SDA Forwarding East-West 트래픽 흐름 문제 해결
소개
이 문서에서는 SDA(Software Defined Access)의 일부로 East-West 트래픽 흐름을 검증하는 방법에 대해 설명합니다.
사전 요구 사항
요구 사항
다음 주제에 대한 지식을 보유하고 있으면 유용합니다.
- IP(인터넷 프로토콜) 포워딩
- LISP(Locator/ID Separation Protocol)
사용되는 구성 요소
이 문서의 정보는 다음 소프트웨어 및 하드웨어 버전을 기반으로 합니다.
- Cisco IOS® XE 17.10.1의 C9000v
- SDA 1.0(LISP PubSub 아님)
이 문서의 정보는 특정 랩 환경의 디바이스를 토대로 작성되었습니다. 이 문서에 사용된 모든 디바이스는 초기화된(기본) 컨피그레이션으로 시작되었습니다. 현재 네트워크가 작동 중인 경우 모든 명령의 잠재적인 영향을 미리 숙지하시기 바랍니다.
관련 제품
이 문서는 다음과 같은 하드웨어 및 소프트웨어 버전에서도 사용할 수 있습니다.
- C9200
- C9300
- C9400
- C9500
- C9600
- Cisco IOS® XE 16.12 이상
배경 정보
SDA East-West Traffic Flow는 SDA 패브릭 내의 엔드포인트가 동일한 패브릭 내의 다른 엔드포인트와 통신하려는 개념을 의미합니다. 동서 간 흐름으로 간주되지 않는 것이 무엇인지에 대해서는 주의할 점이 있다. East-West 트래픽 흐름의 예는 다음과 같습니다.
- 동일한 서브넷(172.19.10.3과 통신하는 172.17.10.2)에 있는 엔드포인트는 L2LISP 확장으로 간주됩니다
- 동일한 VRF(VN)(172.19.10.2, 172.19.11.2와 통신하며 둘 다 VRF 캠퍼스에 있음)에 있는 엔드포인트는 L3 LISP로 간주됩니다
- L2 핸드오프 경계에 연결된 호스트와 통신하는 패브릭 내에 있는 엔드포인트이며, L2LISP와 정확히 동일합니다.
East-West 트래픽 흐름은 다음 예를 참조하지 않습니다.
- 트래픽은 SDA 패브릭에서 패브릭 외부, 즉 North-South로 시작됨
- Inter-VRF 라우팅은 East-West로도 간주되지 않습니다(VRF 캠퍼스의 엔드포인트, IP 주소 172.19.10.2, VRF 게스트의 엔드포인트와 통신하는 엔드포인트, IP 주소 172.19.11.2).
- SD-WAN 통합 도메인
- SDA 트랜짓
- 테두리 선호도
- 엑스트라넷
토폴로지
이 예의 목적상 C9000v 스위치는 패브릭 에지 및 배치된 경계로 작동합니다. 모든 엔드포인트는 동일한 VN(Virtual Network), red_vn 내에 있습니다. 10.47.4.2 및 10.47.4.2의 엔드포인트는 동일한 서브넷에 있으며, 10.47.10.2의 엔드포인트는 다른 서브넷에 있지만 동일한 VN에 있습니다.
설정
CIsco DNA-Center가 기본 설정으로 SDA 패브릭을 프로비저닝하는 데 사용된다고 가정합니다.
- 레이어 2 확장이 활성화됩니다(IP 주소 조회가 아닌 MAC 주소 조회를 기반으로 트래픽을 강제 전달함).
- 레이어 2 플러딩이 비활성화됩니다(이를 통해 에지 디바이스에서 ARP 억제 및 LISP 지원 ARP 학습이 가능함).
적절한 호스트 온보딩 프로세스가 끝나면 인터페이스 컨피그레이션에는 다음과 같은 여러 섹션이 포함됩니다.
패브릭 에지(10.47.1.12) 인터페이스 구성:
interface GigabitEthernet1/0/3 switchport access vlan 1026 switchport mode access device-tracking attach-policy IPDT_POLICY spanning-tree portfast spanning-tree bpduguard enable end interface Vlan1026 description Configured from Cisco DNA-Center mac-address 0000.0c9f.f341 vrf forwarding red_vn ip address 10.47.4.1 255.255.255.0 ip helper-address 10.47.9.9 no ip redirects ip route-cache same-interface no lisp mobility liveness test lisp mobility red-IPV4 end
패브릭 에지(10.47.1.12) LISP 구성:
router lisp locator-table default locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f IPv4-interface Loopback0 priority 10 weight 10 exit-locator-set
!
instance-id 4099 remote-rloc-probe on-route-change dynamic-eid red-IPV4 database-mapping 10.47.4.0/24 locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f exit-dynamic-eid ! dynamic-eid red-helpdesk-IPV4 database-mapping 10.47.10.0/24 locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f exit-dynamic-eid ! service ipv4 eid-table vrf red_vn map-cache 0.0.0.0/0 map-request sgt distribution sgt exit-service-ipv4 ! exit-instance-id
!
! instance-id 8190 remote-rloc-probe on-route-change service ethernet eid-table vlan 1026 database-mapping mac locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f dynamic-eid detection multiple-addr bridged-vm exit-service-ethernet ! exit-instance-id ! instance-id 8192 remote-rloc-probe on-route-change service ethernet eid-table vlan 1028 database-mapping mac locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f dynamic-eid detection multiple-addr bridged-vm exit-service-ethernet ! exit-instance-id
패브릭 에지(10.47.1.13) 인터페이스 구성:
interface GigabitEthernet1/0/3 switchport access vlan 1026 switchport mode access device-tracking attach-policy IPDT_POLICY spanning-tree portfast spanning-tree bpduguard enable end ! interface GigabitEthernet1/0/5 switchport access vlan 1028 switchport mode access device-tracking attach-policy IPDT_POLICY spanning-tree portfast spanning-tree bpduguard enable end ! interface Vlan1026 description Configured from Cisco DNA-Center mac-address 0000.0c9f.f341 vrf forwarding red_vn ip address 10.47.4.1 255.255.255.0 ip helper-address 10.47.9.9 no ip redirects ip route-cache same-interface no lisp mobility liveness test lisp mobility red-IPV4 end ! interface Vlan1028 description Configured from Cisco DNA-Center mac-address 0000.0c9f.f800 vrf forwarding red_vn ip address 10.47.10.1 255.255.255.0 ip helper-address 10.47.9.9 no ip redirects ip route-cache same-interface no lisp mobility liveness test lisp mobility red-helpdesk-IPV4 end
패브릭 에지(10.47.1.13) LISP 구성
router lisp locator-table default locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 IPv4-interface Loopback0 priority 10 weight 10 exit-locator-set ! instance-id 4099 remote-rloc-probe on-route-change dynamic-eid red-IPV4 database-mapping 10.47.4.0/24 locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 exit-dynamic-eid ! dynamic-eid red-helpdesk-IPV4 database-mapping 10.47.10.0/24 locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 exit-dynamic-eid ! service ipv4 eid-table vrf red_vn map-cache 0.0.0.0/0 map-request sgt distribution sgt exit-service-ipv4 ! exit-instance-id ! instance-id 8190 remote-rloc-probe on-route-change service ethernet eid-table vlan 1026 database-mapping mac locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 dynamic-eid detection multiple-addr bridged-vm exit-service-ethernet ! exit-instance-id ! instance-id 8192 remote-rloc-probe on-route-change service ethernet eid-table vlan 1028 database-mapping mac locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 dynamic-eid detection multiple-addr bridged-vm exit-service-ethernet ! exit-instance-id
호스트 온보딩 확인
호스트 온보딩 프로세스의 일부로 다음과 같은 몇 가지 구조가 생성됩니다.
IPDT/IP 장치 추적 항목
호스트 온보딩에 성공하면 IPDT(IP Device Tracking) 테이블에 유효한 항목이 있으며 엔드 호스트가 REACHABLE로 표시됩니다.
Edge-1#show device-tracking database interface g1/0/3
portDB has 2 entries for interface Gi1/0/3, 2 dynamic
Codes: L - Local, S - Static, ND - Neighbor Discovery, ARP - Address Resolution Protocol, DH4 - IPv4 DHCP, DH6 - IPv6 DHCP, PKT - Other Packet, API - API created
Preflevel flags (prlvl):
0001:MAC and LLA match 0002:Orig trunk 0004:Orig access
0008:Orig trusted trunk 0010:Orig trusted access 0020:DHCP assigned
0040:Cga authenticated 0080:Cert authenticated 0100:Statically assigned
Network Layer Address Link Layer Address Interface vlan prlvl age state Time left
DH4 10.47.4.2 5254.0019.93e9 Gi1/0/3 1026 0024 3mn REACHABLE 28 s try 0(15198 s)
MAC/ARP 항목
엔드 호스트가 성공적으로 온보딩되면 기본 게이트웨이를 ping할 수 있습니다(또는 이 통신을 차단하는 엔드포인트에 방화벽이 설치되어 있지 않은 경우 기본 게이트웨이에서 ping할 수 있음).
Edge-1#ping vrf red_vn 10.47.4.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.47.4.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 142/150/161 ms
에지 노드에는 MAC 주소 및 테이블의 해당 ARP 항목(VRF)이 있습니다.
Edge-1#show mac address-table interface g1/0/3
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
1026 5254.0019.93e9 DYNAMIC Gi1/0/3
Total Mac Addresses for this criterion: 1
Edge-1#show ip arp vrf red_vn
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.47.4.1 - 0000.0c9f.f341 ARPA Vlan1026
Internet 10.47.4.2 1 5254.0019.93e9 ARPA Vlan1026
Internet 10.47.10.1 - 0000.0c9f.f800 ARPA Vlan1028
소프트웨어 FED MAC 주소 프로그래밍**
FED에서 MAC 주소를 확인하려면 show platform software fed switch active matm macTable vlan <vlan id> mac <mac address> 명령을 사용합니다
Edge-1#show platform software fed switch active matm macTable vlan 1026 mac 5254.0019.93e9 VLAN MAC Type Seq# EC_Bi Flags machandle siHandle riHandle diHandle *a_time *e_time ports Con ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 1026 5254.0019.93e9 0x1 9 0 0 0x7f65ec7bda68 0x7f65ec7c21f8 0x0 0x7f65ec6e1368 300 7 GigabitEthernet1/0/3 Yes ======platform hardware details ====== Asic: 0 htm-handle = 0x7f65ec95dc68 MVID = 7 gpn = 1 SI = 0xc3 RI = 0x25 DI = 0x526e DI = 0x526e pmap = 0x00000000 0x00000004 pmap_intf : [GigabitEthernet1/0/3] Asic: 1 SI = 0xc3 RI = 0x25 DI = 0x526e DI = 0x526e pmap = 0x00000000 0x00000000
**MAC 주소 macHandle 프로그래밍**
이전 명령의 macHandle 값(0x7f65ec7bda68)을 가져와 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <macHandle> 1에 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec7bda68 1
Handle:0x7f65ec7bda68 Res-Type:ASIC_RSC_HASH_TCAM Res-Switch-Num:0 Asic-Num:255 Feature-ID:AL_FID_L2 Lkp-ftr-id:LKP_FEAT_L2_SRC_MAC_VLAN ref_count:1
priv_ri/priv_si Handle: (nil)Hardware Indices/Handles: handle [ASIC: 0]: 0x7f65ec95dc68
Features sharing this resource:Cookie length: 12
19 00 54 52 e9 93 07 80 07 00 00 00
Detailed Resource Information (ASIC_INSTANCE# 0)
----------------------------------------
Number of HTM Entries: 1
Entry 0: (handle 0x7f65ec95dc68)
Absolute Index: 6778
Time Stamp: 4
KEY - vlan:7 mac:0x5254001993e9 l3_if:0 gpn:3 epoch:0 static:0 flood_en:0 vlan_lead_wless_flood_en: 0 client_home_asic: 0 learning_peerid 0, learning_peerid_valid 0 lvx:1
MASK - vlan:0 mac:0x0 l3_if:0 gpn:0 epoch:0 static:0 flood_en:0 vlan_lead_wless_flood_en: 0 client_home_asic: 0 learning_peerid 0, learning_peerid_valid 0 lvx:0
SRC_AD - need_to_learn:0 lrn_v:0 catchall:0 static_mac:0 chain_ptr_v:0 chain_ptr: 0 static_entry_v:0 auth_state:0 auth_mode:0 auth_behavior_tag:0 traf_m:0 is_src_ce:0
DST_AD - si:0xb7 bridge:0 replicate:0 blk_fwd_o:0 v4_rmac:0 v6_rmac:0 catchall:0 ign_src_lrn:0 port_mask_o:0 afd_cli_f:0 afd_lbl:0 prio:3 dest_mod_idx:0 destined_to_us:0 pv_trunk:0 smr:0
==============================================================
**MVID 확인**
이전 출력의 숫자 7은 하드웨어의 MVID(Mapped VLAN ID)입니다. "실제" VLAN과 일치하는지 확인하려면 show platform software fed switch active vlan <vlan number>를 사용합니다
Edge-1#show platform software fed switch active vlan 1026 VLAN Fed Information Vlan Id IF Id LE Handle STP Handle L3 IF Handle SVI IF ID MVID ----------------------------------------------------------------------------------------------------------------------- 1026 0x0000000000420011 0x00007f65ec6a08b8 0x00007f65ec6a1138 0x00007f65ec77e838 0x000000000000001d 7
**GPN(Global Port Number) 확인**
GPN을 "실제" 인터페이스와 연계하려면 show platform software fed switch active ifm mappings gpn 명령을 사용합니다
Edge-1#show platform software fed switch active ifm mappings gpn
Mappings Table
GPN Interface IF_ID IF_TYPE
--------------------------------------------------------------------------------------------------
1 GigabitEthernet1/0/1 0x0000001a ETHER
2 GigabitEthernet1/0/2 0x0000001b ETHER
3 GigabitEthernet1/0/3 0x0000000b ETHER <-- GPN 3 lines up with the expected Egress interface
**MAC 주소 siHandle 프로그래밍**
이전 명령의 siHandle 값(0x7f65ec7c21f8)을 가져와 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <si_handle> 1에 활용합니다.
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec7c21f8 1
Handle:0x7f65ec7c21f8 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:2
priv_ri/priv_si Handle: 0x7f65ec7c2498Hardware Indices/Handles: index0:0xc3 mtu_index/l3u_ri_index0:0x0 index1:0xc3 mtu_index/l3u_ri_index1:0x0
Features sharing this resource:66 (1)]
57 (1)]
Cookie length: 56
00 00 00 00 00 00 00 00 02 04 00 00 00 00 00 00 00 00 00 00 07 00 52 54 00 19 93 e9 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Detailed Resource Information (ASIC_INSTANCE# 0)
----------------------------------------
Station Index (SI) [0xc3] <-- Station Index is comprised of the Rewrite Index (RI) and Destination Index (DI) RI = 0x25 <-- Rewrite Index contains the forwarding information DI = 0x526e <-- Destination Index contains information related to the outgoing interface
stationTableGenericLabel = 0
stationFdConstructionLabel = 0x7
lookupSkipIdIndex = 0
rcpServiceId = 0
dejaVuPreCheckEn = 0x1
Replication Bitmap: LD <-- Local Data (LD) indicates that the destination is on this ASIC
Detailed Resource Information (ASIC_INSTANCE# 1)
----------------------------------------
Station Index (SI) [0xc3] <-- Station Index is comprised of the Rewrite Index (RI) and Destination Index (DI) RI = 0x25 <-- Rewrite Index contains the forwarding information DI = 0x526e <-- Destination Index contains information related to the outgoing interface
stationTableGenericLabel = 0
stationFdConstructionLabel = 0x7
lookupSkipIdIndex = 0
rcpServiceId = 0
dejaVuPreCheckEn = 0x1
Replication Bitmap: CD <-- Core Data (CD) indicates that the destination is on the same ASIC, different core ==============================================================
**MAC 주소 다시 쓰기 인덱스 확인**
이전 명령의 RI 값(0x25)을 가져와 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI>에 활용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x25 0x25
ASIC#:0 RI:37 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 52:54:00:19:93:e9,
L3IF LE Index 41
ASIC#:0 RI:38 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 01:00:5e:00:00:00,
L3IF LE Index 40
ASIC#:0 RI:39 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 52:54:00:00:50:17,
L3IF LE Index 40
ASIC#:1 RI:37 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 52:54:00:19:93:e9,
L3IF LE Index 41
ASIC#:1 RI:38 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 01:00:5e:00:00:00,
L3IF LE Index 40
ASIC#:1 RI:39 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)
MAC Addr: MAC Addr: 52:54:00:00:50:17,
L3IF LE Index 40
**MAC 주소 대상 인덱스 확인**
이전 명령의 DI 값(0x526e)을 가져와 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI>에서 활용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x526e 0x526e
ASIC#0:
Destination index = 0x526e
pmap = 0x00000000 0x00000004 <-- Convert decimal 4 to binary, which is 0100. Count this binary right to left, zero-based, so Port 2. pmap_intf : [GigabitEthernet1/0/3]
cmi = 0x0
rcp_pmap = 0x0
al_rsc_cmi
CPU Map Index (CMI) [0]
ctiLo0 = 0
ctiLo1 = 0
ctiLo2 = 0
cpuQNum0 = 0
cpuQNum1 = 0
cpuQNum2 = 0
npuIndex = 0
stripSeg = 0
copySeg = 0
ASIC#1:
Destination index = 0x526e
pmap = 0x00000000 0x00000000
cmi = 0x0
rcp_pmap = 0x0
al_rsc_cmi
CPU Map Index (CMI) [0]
ctiLo0 = 0
ctiLo1 = 0
ctiLo2 = 0
cpuQNum0 = 0
cpuQNum1 = 0
cpuQNum2 = 0
npuIndex = 0
stripSeg = 0
copySeg = 0
**포트 확인**
이전에 확인한 포트의 상관관계를 분석하려면 commandshow platform software fed switch active ifm 매핑을 사용하고 Port 열을 확인합니다.
Edge-1#show platform software fed switch active ifm mappings ------------------ show platform software fed switch active ifm mappings ------------------ Interface IF_ID Inst Asic Core Port SubPort Mac Cntx LPN GPN Type Active GigabitEthernet1/0/1 0x1a 0 0 0 0 0 1 0 1 1 NIF Y GigabitEthernet1/0/2 0x1b 0 0 0 1 0 2 1 2 2 NIF Y GigabitEthernet1/0/3 0xb 0 0 0 2 0 3 2 3 3 NIF Y <-- Matches port 2 from previous output
**하드웨어 FED MAC 주소 확인**
작업/이상적인 시나리오의 이 출력은 macHandle 디코딩이 제공한 것과 일치합니다.
Edge-1#show platform hardware fed switch active matm macTable vlan 1026 mac 5254.0019.93e9 HEAD: MAC address 5254.0019.93e9 in VLAN 1026 KEY: vlan 7, mac 0x5254001993e9, l3_if 0, gpn 3, epoch 0, static 0, flood_en 0, vlan_lead_wless_flood_en 0, client_home_asic 0, learning_peerid 0, learning_peerid_valid 0 MASK: vlan 0, mac 0x0, l3_if 0, gpn 0, epoch 0, static 0, flood_en 0, vlan_lead_wless_flood_en 0, client_home_asic 0 learning_peerid 0, learning_peerid_valid 0 SRC_AD: need_to_learn 0, lrn_v 0, catchall 0, static_mac 0, chain_ptr_v 0, chain_ptr 0, static_entry_v 0, auth_state 0, auth_mode 0, traf_mode 0, is_src_ce 0 DST_AD: si 0xb7, bridge 0, replicate 0, blk_fwd_o 0, v4_mac 0, v6_mac 0, catchall 0, ign_src_lrn 0, port_mask_o 0, afd_cli_f 0, afd_lbl 0, priority 3, dest_mod_idx 0, destined_to_us 0, pv_trunk 0 Total Mac number of addresses:: 1
- 하드웨어의 VLAN ID(MVID)는 7입니다.
- MAC 주소: 5254.0019.93e9
- GPN: 3
LISP 항목
호스트 온보딩에 성공한 후 엔드 호스트에 대한 LISP 항목이 Edge Node에서 로컬로 생성되고 Control Nodes(LISP MSMR - LISP Map Server / Map Resolver)에 등록됩니다. L2 및 L3에 대해 확인할 수 있는 특정 인스턴스 ID 범위와 관련하여 모든 LISP 확인을 수행해야 합니다.
Edge-1#show vlan id 1026 VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1026 red active L2LI0:8190, Gi1/0/3 <-- L2 LISP Instance ID tied to VLAN 1026
**L2 LISP 데이터베이스 확인**
L2 LISP 데이터베이스를 확인하려면 show lisp instance-id <L2 LISP ID> ethernet database <mac address> 명령을 사용합니다
Edge-1#show lisp instance-id 8190 ethernet database 5254.0019.93e9 LISP ETR MAC Mapping Database for LISP 0 EID-table Vlan 1026 (IID 8190), LSBs: 0x1 Entries total 1, no-route 0, inactive 0, do-not-register 2 5254.0019.93e9/48, dynamic-eid Auto-L2-group-8190, inherited from default locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f -----> Endpoint MAC Uptime: 2d17h, Last-change: 2d17h Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.12 10/10 cfg-intf site-self, reachable -----> Our own RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1d11h Yes 0 -----> RLOC of upstream collocated border 10.47.1.11 2d17h Yes 0 -----> RLOC of upstream collocated border
**LISP L2 AR(Address Resolution) 데이터베이스 확인**
LISP L2 AR 데이터베이스를 확인하려면 show lisp instance-id <LISP L2 IID> ethernet database address-resolution <mac address> 명령을 사용합니다
Edge-1#show lisp instance-id 8190 ethernet database address-resolution 5254.0019.93e9 LISP ETR Address Resolution for LISP 0 EID-table Vlan 1026 (IID 8190) (*) -> entry being deleted Hardware Address L3 InstID Host Address 5254.0019.93e9 4099 10.47.4.2/32 <-- Endpoint MAC Address, LISP L3 Instance ID, Endpoint IPv4 Address, respectively
**LISP L3 데이터베이스 확인**
LISP L3 데이터베이스를 확인하려면 show lisp instance-id <LISP L3 IID> ipv4 database <IP address/Subnet Mask> 명령을 사용합니다
Edge-1#show lisp instance-id 4099 ipv4 database 10.47.4.2/32 LISP ETR IPv4 Mapping Database for LISP 0 EID-table vrf red_vn (IID 4099), LSBs: 0x1 Entries total 1, no-route 0, inactive 0, do-not-register 1 10.47.4.2/32, dynamic-eid red-IPV4, inherited from default locator-set rloc_222e1707-175d-4019-a783-060404f8bc2f -----> Endpoint IPv4 Address Uptime: 2d18h, Last-change: 2d18h Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.12 10/10 cfg-intf site-self, reachable -----> Our own RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1d11h Yes 0 -----> RLOC of upstream collocated border 10.47.1.11 2d17h Yes 0 -----> RLOC of upstream collocated border
**CEF 확인**
CEF를 확인하려면 show ip cef vrf <vrf name> <IP address> internal 명령을 사용합니다
Edge-1#show ip cef vrf red_vn 10.47.4.2 internal
10.47.4.2/32, epoch 1, flags [att, sc], RIB[D], refcnt 6, per-destination sharing
sources: RIB, Adj, IPL
feature space:
IPRM: 0x00058000
Broker: linked, distributed at 3rd priority
subblocks:
SC owned,sourced: LISP local EID -
SC inherited: LISP remote EID - locator status bits 0x00000000
SC inherited: LISP cfg dyn-EID - LISP configured dynamic-EID
LISP EID attributes: localEID Yes, c-dynEID Yes, d-dynEID Yes, a-dynEID No
SC owned,sourced: LISP generalised SMR - [disabled, not inheriting, 0x7F06D0A67E40 locks: 1]
Adj source: IP adj out of Vlan1026, addr 10.47.4.2 7F06D300B738
Dependent covered prefix type adjfib, cover 10.47.4.0/24
2 IPL sources [no flags]
ifnums:
Vlan1026(29): 10.47.4.2
path list 7F06CEE8D720, 3 locks, per-destination, flags 0x49 [shble, rif, hwcn]
path 7F06D0A900C8, share 1/1, type attached nexthop, for IPv4
nexthop 10.47.4.2 Vlan1026, IP adj out of Vlan1026, addr 10.47.4.2 7F06D300B738
output chain:
IP adj out of Vlan1026, addr 10.47.4.2 7F06D300B738
SDA 에지 노드의 로컬 LISP 항목 외에도 SDA 제어 노드(LISP MS/MR)에는 엔드포인트에 대한 추가 정보가 포함되어 있습니다.
배치된 보더 L2 LISP 서버 확인:
L2 LISP 서버를 확인하려면 show lisp instance-id <L2 LISP IID> ethernet server <MAC Address> 명령을 사용합니다
Border-1#show lisp instance-id 8190 ethernet server 5254.0019.93e9
LISP Site Registration Information
Site name: site_uci
Description: map-server configured from Cisco DNA-Center
Allowed configured locators: any
Requested EID-prefix:
EID-prefix: 5254.0019.93e9/48 instance-id 8190 <-- Endpoint MAC Address
First registered: 2w5d
Last registered: 3d16h
Routing table tag: 0
Origin: Dynamic, more specific of any-mac
Merge active: No
Proxy reply: Yes
Skip Publication: No
Force Withdraw: No
TTL: 1d00h
State: complete
Extranet IID: Unspecified
Registration errors:
Authentication failures: 0
Allowed locators mismatch: 0
ETR 10.47.1.12:21038, last registered 3d16h, proxy-reply, map-notify <-- Egress Tunnel Router (Fabric Edge IP address)
TTL 1d00h, no merge, hash-function sha1
state complete, no security-capability
nonce 0xB60C4314-0x97BB332D
xTR-ID 0xAB3179F6-0xC774F22C-0x00F2C82E-0x3A66738D
site-ID unspecified
Domain-ID local
Multihoming-ID unspecified
sourced by reliable transport
Locator Local State Pri/Wgt Scope
10.47.1.12 yes up 10/10 IPv4 none <--(Fabric Edge IP address)
배치된 보더 L2 LISP AR(Address Resolution) 서버 확인:
L2 LISP AR 서버를 확인하려면 show lisp instance-id <LISP L2 IID> ethernet server address-resolution <IP address> 명령을 사용합니다
등록 기록을 확인하려면 show lisp instance-id <LISP L2 IID> ethernet server address-resolution <IP address> registration-history 명령을 사용합니다
Border-1#show lisp instance-id 8190 ethernet server address-resolution 10.47.4.2 Address-resolution data for router lisp 0 instance-id 8190 Site name: site_uci Host Address: 10.47.4.2/32 Hardware Address: 5254.0019.93e9 First registered: 2w5d Last registered: 3d16h Registration errors: Authentication failures: 0 ETR 10.47.1.12:21038 Last registered: 3d16h TTL: 1d00h xTR-ID: 0xAB3179F6-0xC774F22C-0x00F2C82E-0x3A66738D Site-ID: unspecified Registered addr: 5254.0019.93e9 L3 Instance ID: 4099
Border-1#show lisp instance-id 8190 ethernet server address-resolution 10.47.4.2 registration-history Map-Server registration history Roam = Did host move to a new location? WLC = Did registration come from a Wireless Controller? Prefix qualifier: + = Register Event, - = Deregister Event, * = AR register event Timestamp (UTC) Instance Proto Roam WLC Source EID prefix / Locator *Sep 29 16:50:27.762 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9 *Oct 1 21:05:11.086 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9 *Oct 2 06:51:11.882 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9 *Oct 3 00:56:33.642 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9 *Oct 3 01:53:45.934 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9 *Oct 6 04:36:08.685 8190 TCP No No 10.47.1.12 +*10.47.4.2/32 / 5254.0019.93e9
배치된 보더 L3 LISP 서버 확인
L3 LISP 서버를 확인하려면 show lisp instance-id <LISP L3 IID> ipv4 server <IP address> 명령을 사용합니다
L3 LISP 서버 등록 기록을 확인하려면 show lisp instance-id <LISP L3 IID> ipv4 server <IP address> registration-history 명령을 사용합니다
Border-1#show lisp instance-id 4099 ipv4 server 10.47.4.2
LISP Site Registration Information
Site name: site_uci
Description: map-server configured from Cisco DNA-Center
Allowed configured locators: any
Requested EID-prefix:
EID-prefix: 10.47.4.2/32 instance-id 4099
First registered: 2w5d
Last registered: 02:39:39
Routing table tag: 0
Origin: Dynamic, more specific of 10.47.4.0/24
Merge active: No
Proxy reply: Yes
Skip Publication: No
Force Withdraw: No
TTL: 1d00h
State: complete
Extranet IID: Unspecified
Registration errors:
Authentication failures: 0
Allowed locators mismatch: 0
ETR 10.47.1.12:21038, last registered 02:39:39, proxy-reply, map-notify
TTL 1d00h, no merge, hash-function sha1
state complete, no security-capability
nonce 0x128CB668-0xF7B85F77
xTR-ID 0xAB3179F6-0xC774F22C-0x00F2C82E-0x3A66738D
site-ID unspecified
Domain-ID local
Multihoming-ID unspecified
sourced by reliable transport
Locator Local State Pri/Wgt Scope
10.47.1.12 yes up 10/10 IPv4 none
Border-1#show lisp instance-id 4099 ipv4 server 10.47.4.2/32 registration-history
Map-Server registration history
Roam = Did host move to a new location?
WLC = Did registration come from a Wireless Controller?
Prefix qualifier: + = Register Event, - = Deregister Event, * = AR register event
Timestamp (UTC) Instance Proto Roam WLC Source
EID prefix / Locator
*Oct 6 04:36:01.548 4099 UDP No No 10.47.1.12
+ 10.47.4.2/32
*Oct 6 04:36:08.686 4099 TCP No No 10.47.1.12
+ 10.47.4.2/32
*Oct 9 18:35:48.058 4099 TCP No No 10.47.1.12
+ 10.47.4.2/32
SDA의 ARP 해결
Cisco Catalyst Center를 사용하여 기본 설정으로 SDA 패브릭을 프로비저닝한 것으로 가정합니다. 즉, 레이어 2 확장이 활성화되고 패브릭 내의 모든 트래픽(동일한 VLAN/VN)이 IP 주소 조회/LISP IP 인스턴스가 아닌 MAC 주소 조회/LISP 이더넷 인스턴스를 기반으로 전달됩니다.
트러블슈팅 관점에서 양쪽 호스트의 고정 ARP 항목을 구성하여 패브릭의 일반 연결에 문제가 있는지(호스트 간에 ping이 작동하지 않는 경우) 또는 ARP 확인에만 문제가 있는지 신속하게 확인하는 것이 유용할 수 있습니다.
SDA 패브릭의 ARP 프로세스는 LISP를 활용하여 호스트의 ID와 위치를 확인하며 기존 라우팅/스위칭 환경의 ARP 동작과 다릅니다.
1단계: 패브릭 엔드포인트가 ARP 요청을 전송하여 다른 패브릭 엔드포인트에 대한 MAC/IP 바인딩을 확인합니다.
인그레스 인터페이스에서 패킷 캡처를 구성하여 ARP 패킷이 호스트로부터 수신되었음을 확인할 수 있습니다.
Edge-1#monitor capture 1 interface g1/0/3 in match any
Edge-1#mon cap 1 start
Started capture point : 1
Edge-1#mon cap 1 stop
Capture statistics collected at software:
Capture duration - 22 seconds
Packets received - 13
Packets dropped - 0
Packets oversized - 0
Number of Bytes dropped at asic not collected
Capture buffer will exists till exported or cleared
Stopped capture point : 1
Edge-1#show monitor capture 1 buffer brief
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
1 0.000000 52:54:00:19:93:e9 -> ff:ff:ff:ff:ff:ff ARP 60 Who has 10.47.4.3? Tell 10.47.4.2
2 1.028893 52:54:00:19:93:e9 -> ff:ff:ff:ff:ff:ff ARP 60 Who has 10.47.4.3? Tell 10.47.4.2
3 2.058244 52:54:00:19:93:e9 -> ff:ff:ff:ff:ff:ff ARP 60 Who has 10.47.4.3? Tell 10.47.4.2
Edge-1#show monitor capture 1 buffer display-filter arp detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 1: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0
Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe)
Interface name: /tmp/epc_ws/wif_to_ts_pipe
Encapsulation type: Ethernet (1)
Arrival Time: Oct 10, 2023 14:52:03.659290000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1696949523.659290000 seconds
[Time delta from previous captured frame: 0.000000000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 0.000000000 seconds]
Frame Number: 1
Frame Length: 60 bytes (480 bits)
Capture Length: 60 bytes (480 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:arp]
Ethernet II, Src: 52:54:00:19:93:e9 (52:54:00:19:93:e9), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) <-- SMAC/DMAC respectively
Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
Source: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
Address: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: ARP (0x0806)
Padding: 000000000000000000000000000000000000
Address Resolution Protocol (request)
Hardware type: Ethernet (1)
Protocol type: IPv4 (0x0800)
Hardware size: 6
Protocol size: 4
Opcode: request (1)
Sender MAC address: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
Sender IP address: 10.47.4.2
Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
Target IP address: 10.47.4.3
2단계. 에지 노드는 ARP 패킷을 사용하고 LISP 요청을 생성하여 HOST-02의 MAC 주소를 확인합니다.
Edge-1은 LISP Control-Planes(배치된 경계)에 MAC 주소 10.47.4.3을 확인하기 위한 LISP 맵 요청을 보냅니다.
Edge-1#debug lisp control-plane all
Edge-1#debug l2lisp all
LISP[REMT ]-0: Map Request: Delay is over for IID 8190 EID 10.47.4.3/32, requester 'AR'. LISP[REMT ]-0 IID 8190: Schedule processing of Map-Requests from 'remote EID prefix' in IPv4. LISP[REMT ]-0: Map Request: Sending request for IID 8190 EID 10.47.4.3/32, requester 'AR'.
3단계. 제어 노드는 IP/MAC 매핑에 대한 LISP 요청을 받고 응답을 다시 SDA 에지 노드로 보냅니다.
LISP Map-Request는 Fabric Edge에서 수신되며 10.47.4.3에 연결된 MAC 주소로 LISP Map-Reply로 응답합니다.
Border-1#debug lisp control-plane all
Border-1#debug l2lisp all
LISP[TRNSP]-0: Processing received Map-Request(1) message on GigabitEthernet1/0/3 from 10.47.4.3:4342 to 10.47.4.3:4342. LISP[MR ]-0: Received Map-Request with 1 records, first EID IID 8190 10.47.4.3/32, source EID UNSPEC, nonce 0x73F75F36-0x061CAF58. LISP[MR ]-0 IID 8190 Eth-ARP: MS EID 10.47.4.3/32: Sending proxy reply to 10.47.1.12.
LISP 컨트롤 플레인은 로컬 데이터베이스에 저장된 주소 확인 항목에 따라 프록시 회신으로 응답합니다
Border-1#show lisp instance-id 8190 ethernet server address-resolution 10.47.4.3 Address-resolution data for router lisp 0 instance-id 8190 Site name: site_uci Host Address: 10.47.4.3/32 Hardware Address: 5254.001e.ad00 First registered: 21:11:17 Last registered: 21:11:17 Registration errors: Authentication failures: 0 ETR 10.47.1.13:16056 Last registered: 21:11:17 TTL: 1d00h xTR-ID: 0x8CEE6478-0x9358E248-0xE935FF07-0x8C3C5450 Site-ID: unspecified Registered addr: 5254.001e.ad00 L3 Instance ID: 4099
4단계. 에지 노드는 MAC 주소가 10.47.4.3인 LISP 응답을 받습니다.
패브릭 에지 노드에서 LISP 프록시 응답을 수신합니다.
LISP[REMT ]-0: Processing Map-Reply mapping record for IID 8190 MAC 5254.001e.ad00/48 LCAF 2, ttl 1440, action none, not authoritative, 1 locator. LISP[REMT ]-0: Processing mapping information for EID prefix IID 8190 5254.001e.ad00/48.
5단계. 에지 노드는 MAC 주소에 대한 RLOC 위치를 결정하기 위해 LISP 맵 요청 패킷을 보냅니다.
처음 세 단계를 성공적으로 완료한 후 에지 노드는 ARP가 처음 생성된 MAC 주소 10.47.4.3을 알고 있습니다. 레이어 2 확장이 활성화되면 에지 노드는 이 정보를 10.47.4.2에 다시 회신하지 않고 이그레스 노드 에지의 RLOC 위치를 확인하는 데 사용합니다. 따라서 기존 레이어 2 네트워크에서처럼 10.47.4.3으로 ARP를 전달할 수 있습니다.
따라서 에지 노드는 이더넷 인스턴스에서 또 다른 LISP 맵 요청 패킷을 생성하며, 이번에는 10.47.4.2의 MAC 주소에 대한 RLOC 정보를 요청합니다.
Edge-1#debug lisp control-plane all
Edge-1#debug l2lisp all
*Oct 10 17:01:41.430: LISP[REMT ]-0 IID 8190: Schedule processing of Map-Requests from 'remote EID prefix' in IPv4. *Oct 10 17:01:41.430: LISP[REMT ]-0: Map Request: Sending request for IID 8190 EID 5254.001e.ad00/48, requester 'remote EID prefix'
6단계: MAC 주소의 RLOC 위치를 결정하기 위해 제어 노드에서 LISP 맵 요청 패킷을 수신합니다.
제어 노드는 LISP 패킷을 수신하고 로컬 데이터베이스 상태에 따라 응답합니다
Border-1#debug lisp control-plane all Border-1#debug l2lisp all *Oct 10 16:04:42.055: LISP[MR ]-0 IID 8190 Eth-ARP: MS EID 10.47.4.3/32: Sending proxy reply to 10.47.1.12. *Oct 10 16:04:42.407: LISP[MR ]-0: Received Map-Request with 1 records, first EID IID 8190 5254.001e.ad00/48, source EID 0000.0c9f.f341, nonce 0x75E13E8C-0x40DE7912. *Oct 10 16:04:42.408: LISP[MR ]-0 IID 8190 MAC: MS EID 5254.001e.ad00/48: Sending proxy reply to 10.47.1.12.
7단계: LISP Map-Reply is received by Edge Node(에지 노드에서 LISP 맵 응답 수신)
제어 노드에서 생성한 LISP 맵 응답이 에지 노드에서 수신됩니다.
Edge-1#debug lisp control-plane all
Edge-1#debug l2lisp all
*Oct 10 17:44:00.181: LISP[TRNSP]-0: Processing received Map-Reply(2) message on GigabitEthernet1/0/2 from 10.47.1.13:4342 to 10.47.1.12:4342. *Oct 10 17:44:00.181: LISP[REMT ]-0: Received Map-Reply with nonce 0xF954EC80-0x039D7E4A, 1 records. *Oct 10 17:44:00.181: LISP[REMT ]-0: Map-Reply nonce matches pending request for IID 8190 EID 5254.001e.ad00/48, requester 'remote EID RLOC'. *Oct 10 17:44:00.181: LISP[REMT ]-0: Processing Map-Reply mapping record for IID 8190 MAC 5254.001e.ad00/48 LCAF 2, ttl 1440, action none, authoritative, 1 locator. *Oct 10 17:44:00.181: LISP[REMT ]-0: Map Request: Received reply with rtt 560ms. *Oct 10 17:44:00.181: LISP[REMT ]-0: Processing mapping information for EID prefix IID 8190 5254.001e.ad00/48.
이렇게 하면 LISP 이더넷 인스턴스 맵 캐시에 항목이 만들어지고 ARP 패킷이 10.47.4.3이 연결된 Edge-2로 전달될 수 있습니다
Edge-1#show lisp instance-id 8190 ethernet map-cache 5254.001e.ad00
LISP MAC Mapping Cache for LISP 0 EID-table Vlan 1026 (IID 8190), 1 entries
5254.001e.ad00/48, uptime: 00:04:11, expires: 23:55:48, via map-reply, complete
Sources: map-reply
State: complete, last modified: 00:04:11, map-source: 10.47.1.13
Active, Packets out: 8(0 bytes), counters are not accurate (~ 00:00:04 ago)
Encapsulating dynamic-EID traffic
Locator Uptime State Pri/Wgt Encap-IID
10.47.1.13 00:04:11 up 10/10 -
Last up-down state change: 00:04:11, state change count: 1
Last route reachability change: 00:04:11, state change count: 1
Last priority / weight change: never/never
RLOC-probing loc-status algorithm:
Last RLOC-probe sent: 00:04:11 (rtt 560ms)
8단계. ARP는 VXLAN에서 캡슐화되어 HOST-02로 전송됩니다.
모든 LISP 관련 단계는 10.47.4.3의 위치를 확인하는 데 필요했습니다. 그러면 에지 노드가 원래의 ARP(브로드캐스트) 패킷을 적절한 에지 노드를 향해 유니캐스트로 전송할 수 있습니다. 단일 ARP 패킷이 10.47.4.2에서 전송된 경우에도 적절한 ARP 확인이 가능하도록 모든 단계가 완료될 때까지 원래 ARP 요청은 에지 노드 CPU에 의해 캐시됩니다(삭제되지 않음).
ARP 패킷은 다음 예제와 같이 VXLAN에서 캡슐화됩니다.
Edge-2#show monitor capture 1 buffer display-filter arp brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit
67 15.149181 52:54:00:19:93:e9 -> 52:54:00:1e:ad:00 ARP 110 Who has 10.47.4.3? Tell 10.47.4.2 68 15.155511 52:54:00:19:93:e9 -> 52:54:00:1e:ad:00 ARP 110 Who has 10.47.4.3? Tell 10.47.4.2
ARP 요청은 VXLAN에서 캡슐화되었으며 브로드캐스트 ARP 요청에서 유니캐스트 ARP 요청으로 변환됩니다.
Frame 68: 110 bytes on wire (880 bits), 110 bytes captured (880 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0
Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe)
Interface name: /tmp/epc_ws/wif_to_ts_pipe
Encapsulation type: Ethernet (1)
Arrival Time: Oct 10, 2023 17:56:43.256570000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1696960603.256570000 seconds
[Time delta from previous captured frame: 0.006330000 seconds]
[Time delta from previous displayed frame: 0.006330000 seconds]
[Time since reference or first frame: 15.155511000 seconds]
Frame Number: 68
Frame Length: 110 bytes (880 bits)
Capture Length: 110 bytes (880 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:vxlan:eth:ethertype:arp]
Ethernet II, Src: 52:54:00:0a:42:11 (52:54:00:0a:42:11), Dst: 52:54:00:17:fe:65 (52:54:00:17:fe:65)
Destination: 52:54:00:17:fe:65 (52:54:00:17:fe:65)
Address: 52:54:00:17:fe:65 (52:54:00:17:fe:65)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: 52:54:00:0a:42:11 (52:54:00:0a:42:11)
Address: 52:54:00:0a:42:11 (52:54:00:0a:42:11)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: IPv4 (0x0800)
Internet Protocol Version 4, Src: 10.47.1.12, Dst: 10.47.1.13 <-- 10.47.1.12 is Edge-1 RLOC, 10.47.1.13 is Edge-2 RLOC
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
0000 00.. = Differentiated Services Codepoint: Default (0)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 96
Identification: 0x1781 (6017)
Flags: 0x4000, Don't fragment
0... .... .... .... = Reserved bit: Not set
.1.. .... .... .... = Don't fragment: Set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 253
Protocol: UDP (17)
Header checksum: 0x4f95 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.12
Destination: 10.47.1.13
User Datagram Protocol, Src Port: 65354, Dst Port: 4789
Source Port: 65354
Destination Port: 4789
Length: 76
[Checksum: [missing]]
[Checksum Status: Not present]
[Stream index: 0]
[Timestamps]
[Time since first frame: 15.155511000 seconds]
[Time since previous frame: 0.006330000 seconds]
Virtual eXtensible Local Area Network
Flags: 0x8800, GBP Extension, VXLAN Network ID (VNI)
1... .... .... .... = GBP Extension: Defined
.... .... .0.. .... = Don't Learn: False
.... 1... .... .... = VXLAN Network ID (VNI): True
.... .... .... 0... = Policy Applied: False
.000 .000 0.00 .000 = Reserved(R): 0x0000
Group Policy ID: 0
VXLAN Network Identifier (VNI): 8190 <-- L2 LISP IID
Reserved: 0
Ethernet II, Src: 52:54:00:19:93:e9 (52:54:00:19:93:e9), Dst: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00) <--Unicast ARP Request
Destination: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
Address: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
Address: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: ARP (0x0806)
Trailer: 000000000000000000000000000000000000
Address Resolution Protocol (request)
Hardware type: Ethernet (1)
Protocol type: IPv4 (0x0800)
Hardware size: 6
Protocol size: 4
Opcode: request (1)
Sender MAC address: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
Sender IP address: 10.47.4.2
Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
Target IP address: 10.47.4.3
9단계. ARP 회신은 10.47.4.3에 의해 생성되고 10.47.4.2로 전송됨
Edge-2#show monitor capture 1 buffer display-filter arp brief
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
1 0.000000 52:54:00:1e:ad:00 -> 52:54:00:19:93:e9 ARP 60 10.47.4.3 is at 52:54:00:1e:ad:00
2 0.069429 52:54:00:1e:ad:00 -> 52:54:00:19:93:e9 ARP 60 10.47.4.3 is at 52:54:00:1e:ad:00
11 5.960508 52:54:00:1e:ad:00 -> 52:54:00:19:93:e9 ARP 60 Who has 10.47.4.2? Tell 10.47.4.3
이 때 패킷은 원래 ARP 요청으로서 주소를 브로드캐스트하지 않고 10.47.4.2의 MAC 주소로 전송되며, 인그레스 에지 노드(Edge-2)에 도달하면 일반 LISP 작업이 트리거됩니다. 처음 10.47.4.2의 MAC 주소가 에지 노드의 LISP 이더넷 인스턴스에서 누락되었습니다. 패킷이 CPU로 전송되어 HOST-01에 대한 RLOC를 확인하기 위한 LISP 맵 요청을 생성합니다. 이 동작은 이 문서의 다른 섹션에서 설명한 것과 정확히 동일하며 Edge-2에서 10.47.4.2에 대한 LISP 맵 캐시 항목을 만들 수 있습니다.
Edge-2#show lisp instance-id 8190 ethernet map-cache 5254.0019.93e9
LISP MAC Mapping Cache for LISP 0 EID-table Vlan 1026 (IID 8190), 1 entries
5254.0019.93e9/48, uptime: 03:18:28, expires: 20:41:32, via map-reply, complete
Sources: map-reply
State: complete, last modified: 03:18:28, map-source: 10.47.1.12
Active, Packets out: 386(0 bytes), counters are not accurate (~ 00:00:12 ago)
Encapsulating dynamic-EID traffic
Locator Uptime State Pri/Wgt Encap-IID
10.47.1.12 03:18:28 up 10/10 -
Last up-down state change: 03:18:28, state change count: 1
Last route reachability change: 03:18:28, state change count: 1
Last priority / weight change: never/never
RLOC-probing loc-status algorithm:
Last RLOC-probe sent: 03:18:28 (rtt 710ms)
이 항목을 사용하면 VXLAN 캡슐화에서 Edge-1로 ARP 응답을 성공적으로 전송하고 10.47.4.2의 전체 경쟁 ARP 확인 프로세스에 추가로 전달할 수 있습니다.
SDA 패브릭의 기본 호스트 연결성(동일한 VLAN/동일한 VN)
ARP 확인이 성공적으로 완료되었으며 두 호스트 10.47.4.2 및 10.47.4.3에 서로 적절한 ARP 항목이 있다고 가정합니다.
트러블슈팅 관점에서 양쪽 호스트의 고정 ARP 항목을 구성하여 패브릭의 일반 연결에 문제가 있는지(호스트 간에 ping이 작동하지 않는 경우) 또는 ARP 프로세스에만 문제가 있는지 신속하게 확인하는 것이 매우 유용합니다.
10.47.4.2는 10.47.4.3에 대한 ICMP 요청을 생성합니다.
Edge-1#show monitor capture 1 buffer brief
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
1 0.000000 10.47.4.2 -> 10.47.4.3 ICMP 98 Echo (ping) request id=0x0040, seq=3/768, ttl=64
Edge-1#show monitor capture 1 buffer detail
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 1: 98 bytes on wire (784 bits), 98 bytes captured (784 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0
Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe)
Interface name: /tmp/epc_ws/wif_to_ts_pipe
Encapsulation type: Ethernet (1)
Arrival Time: Oct 10, 2023 18:21:21.484694000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1696962081.484694000 seconds
[Time delta from previous captured frame: 0.000000000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 0.000000000 seconds]
Frame Number: 1
Frame Length: 98 bytes (784 bits)
Capture Length: 98 bytes (784 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:icmp:data]
Ethernet II, Src: 52:54:00:19:93:e9 (52:54:00:19:93:e9), Dst: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00) <-- Endpoint MAC, Anycast GW MAC respectively
Destination: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
Address: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
Address: 52:54:00:19:93:e9 (52:54:00:19:93:e9)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: IPv4 (0x0800)
Internet Protocol Version 4, Src: 10.47.4.2, Dst: 10.47.4.3
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
0000 00.. = Differentiated Services Codepoint: Default (0)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 84
Identification: 0x7321 (29473)
Flags: 0x4000, Don't fragment
0... .... .... .... = Reserved bit: Not set
.1.. .... .... .... = Don't fragment: Set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: ICMP (1)
Header checksum: 0xab25 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.4.2
Destination: 10.47.4.3
Internet Control Message Protocol
Type: 8 (Echo (ping) request)
Code: 0
Checksum: 0x02ea [correct]
[Checksum Status: Good]
Identifier (BE): 64 (0x0040)
Identifier (LE): 16384 (0x4000)
Sequence number (BE): 3 (0x0003)
Sequence number (LE): 768 (0x0300)
Data (56 bytes)
0000 68 95 8c 3d 00 00 00 00 00 00 00 00 00 00 00 00 h..=............
0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0030 00 00 00 00 00 00 00 00 ........
Data: 68958c3d0000000000000000000000000000000000000000b^@&
[Length: 56]
ICMP 패킷은 10.47.4.3으로 Locator(로케이터) 필드에 지정된 Edge Node(에지-2)로 전송되며 포함된 패킷 캡처를 통해 캡처될 수 있습니다.
L2 확장이 활성화된 VLAN에서 패킷이 수신되면 LISP 이더넷 인스턴스에서 조회가 수행됩니다.
Edge-1#show lisp instance-id 8190 ethernet map-cache 5254.001e.ad00
LISP MAC Mapping Cache for LISP 0 EID-table Vlan 1026 (IID 8190), 1 entries
5254.001e.ad00/48, uptime: 00:22:29, expires: 23:37:32, via map-reply, complete
Sources: map-reply
State: complete, last modified: 00:22:29, map-source: 10.47.1.13
Active, Packets out: 42(0 bytes), counters are not accurate (~ 00:00:58 ago)
Encapsulating dynamic-EID traffic
Locator Uptime State Pri/Wgt Encap-IID
10.47.1.13 00:22:29 up 10/10 -
Last up-down state change: 00:22:29, state change count: 1
Last route reachability change: 00:22:29, state change count: 1
Last priority / weight change: never/never
RLOC-probing loc-status algorithm:
Last RLOC-probe sent: 00:22:28 (rtt 1609ms)
원격 엔드포인트의 MAC 주소를 확인하고 L2LI0을 가리킵니다.
Edge-1#show mac add add 5254.001e.ad00
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
1026 5254.001e.ad00 CP_LEARN L2LI0
Total Mac Addresses installed by LISP: REMOTE: 1
FED에서 MAC 주소를 확인하면 추가 정보를 수집할 수 있습니다.
Edge-1#show platform software fed sw active matm macTable vlan 1026 mac 5254.001e.ad00 VLAN MAC Type Seq# EC_Bi Flags machandle siHandle riHandle diHandle *a_time *e_time ports Con ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 1026 5254.001e.ad00 0x1000001 0 0 64 0x7f65ecfdd3a8 0x7f65ecfdd1f8 0x7f65ecfdd048 0x0 0 2 RLOC 10.47.1.13 adj_id 97 No ======platform hardware details ====== Asic: 0 htm-handle = 0x7f65ecc4d188 MVID = 7 gpn = 1 SI = 0xc7 RI = 0x12 DI = 0x5012 Asic: 1 SI = 0xc7 RI = 0x12 DI = 0x5013
MAC 주소 macHandle 디코드
이전 명령에서 macHandle(0x7f65ecfdd3a8)을 가져와서 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <macHandle> 명령에서 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ecfdd3a8 1 Handle:0x7f65ecfdd3a8 Res-Type:ASIC_RSC_HASH_TCAM Res-Switch-Num:0 Asic-Num:255 Feature-ID:AL_FID_L2_WIRELESS Lkp-ftr-id:LKP_FEAT_L2_SRC_MAC_VLAN ref_count:1 priv_ri/priv_si Handle: (nil)Hardware Indices/Handles: handle [ASIC: 0]: 0x7f65ecc4d188 Features sharing this resource:Cookie length: 12 1e 00 54 52 00 ad 07 80 07 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Number of HTM Entries: 1 Entry 0: (handle 0x7f65ecc4d188) Absolute Index: 4706 Time Stamp: 14 KEY - vlan:7 mac:0x5254001ead00 l3_if:0 gpn:3401 epoch:0 static:0 flood_en:0 vlan_lead_wless_flood_en: 0 client_home_asic: 0 learning_peerid 0, learning_peerid_valid 0 lvx:1 MASK - vlan:0 mac:0x0 l3_if:0 gpn:0 epoch:0 static:0 flood_en:0 vlan_lead_wless_flood_en: 0 client_home_asic: 0 learning_peerid 0, learning_peerid_valid 0 lvx:0 SRC_AD - need_to_learn:0 lrn_v:0 catchall:0 static_mac:0 chain_ptr_v:0 chain_ptr: 0 static_entry_v:0 auth_state:0 auth_mode:0 auth_behavior_tag:0 traf_m:0 is_src_ce:0 DST_AD - si:0xc7 bridge:0 replicate:0 blk_fwd_o:0 v4_rmac:0 v6_rmac:0 catchall:0 ign_src_lrn:0 port_mask_o:0 afd_cli_f:0 afd_lbl:0 prio:3 dest_mod_idx:0 destined_to_us:0 pv_trunk:0 smr:1 ==============================================================
MAC 주소 siHandle 디코드
이전 명령에서 siHandle(0x7f65ecfdd1f8)을 가져와서 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <siHandle> 명령에서 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ecfdd1f8 1 Handle:0x7f65ecfdd1f8 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L2_WIRELESS Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ecfdd048Hardware Indices/Handles: index0:0xc7 mtu_index/l3u_ri_index0:0x0 index1:0xc7 mtu_index/l3u_ri_index1:0x0 Features sharing this resource:58 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 02 04 00 00 00 00 00 00 00 00 00 00 07 00 61 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Station Index (SI) [0xc7] <-- Contains the Rewrite Index (RI) and Outgoing Interface Information (DI) RI = 0x12 <-- Rewrite Index = Contains information for forwarding DI = 0x5012 <-- Destination Index = Outgoing Interface stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- Station Index (SI) [0xc7] <-- Contains the Rewrite Index (RI) and Outgoing Interface Information (DI)
RI = 0x12 <-- Rewrite Index = Contains information for forwarding
DI = 0x5013 <-- Destination Index = Outgoing Interface stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD ==============================================================
인덱스 디코드 다시 쓰기
RI(0x12)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI> 명령에서 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x12 0x12 ASIC#:0 RI:18 Rewrite_type:AL_RRM_REWRITE_L2_PAYLOAD_L2LISP_ENCAP(115) Mapped_rii:LVX_L2_ENCAP_L2_PAYLOAD_ROUTED(133) Src IP: 10.47.1.12 <-- Local RLOC Dst IP: 10.47.1.13 <-- Remote RLOC iVxlan dstMac: 0x5254:0x01c:0x7de0 iVxlan srcMac: 0x00:0x00:0x00 IPv4 TTL: 0 iid present: 1 lisp iid: 0 lisp flags: 0 dst Port: 4789 update only l3if: 0 is Sgt: 1 is TTL Prop: 0 L3if LE: 0 (0) Port LE: 0 (0) Vlan LE: 7 (0) ASIC#:1 RI:18 Rewrite_type:AL_RRM_REWRITE_L2_PAYLOAD_L2LISP_ENCAP(115) Mapped_rii:LVX_L2_ENCAP_L2_PAYLOAD_ROUTED(133) Src IP: 10.47.1.12 <-- Local RLOC Dst IP: 10.47.1.13 <-- Remote RLOC iVxlan dstMac: 0x5254:0x01c:0x7de0 iVxlan srcMac: 0x00:0x00:0x00 IPv4 TTL: 0 iid present: 1 lisp iid: 0 lisp flags: 0 dst Port: 4789 update only l3if: 0 is Sgt: 1 is TTL Prop: 0 L3if LE: 0 (0) Port LE: 0 (0) Vlan LE: 7 (0)
대상 인덱스 디코드
DI(0x5012)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI> 명령을 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x5012 0x5012 ASIC#0: Destination index = 0x5012 DI_RCP_PORT1 <-- Recirculation port for VXLAN imposition pmap = 0x00000000 0x00000000 cmi = 0x0 rcp_pmap = 0x1 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0 ASIC#1: Destination index = 0x5012 DI_RCP_PORT1 <-- Recirculation port for VXLAN imposition pmap = 0x00000000 0x00000000 cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0
siHandle 디코드
siHandle(0x7f65ecfdd048)을 사용하여 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <siHandle> 명령을 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ecfdd048 1 Handle:0x7f65ecfdd048 Res-Type:ASIC_RSC_RI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L2_WIRELESS Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ecfdcd78Hardware Indices/Handles: index0:0x12 mtu_index/l3u_ri_index0:0x0 index1:0x12 mtu_index/l3u_ri_index1:0x0 Features sharing this resource:58 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 02 04 00 00 00 00 00 00 00 00 00 00 07 00 61 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- ASIC#:0 RI:18 Rewrite_type:AL_RRM_REWRITE_L2_PAYLOAD_L2LISP_ENCAP(115) Mapped_rii:LVX_L2_ENCAP_L2_PAYLOAD_ROUTED(133) Src IP: 10.47.1.12 <-- Local RLOC Dst IP: 10.47.1.13 <-- Remote RLOC iVxlan dstMac: 0x610:0x00:0x00 iVxlan srcMac: 0x00:0x00:0x00 IPv4 TTL: 0 iid present: 1 lisp iid: 0 lisp flags: 0 dst Port: 4789 update only l3if: 0 is Sgt: 1 is TTL Prop: 0 L3if LE: 0 (0) Port LE: 279 (0) Vlan LE: 7 (0) Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- ASIC#:1 RI:18 Rewrite_type:AL_RRM_REWRITE_L2_PAYLOAD_L2LISP_ENCAP(115) Mapped_rii:LVX_L2_ENCAP_L2_PAYLOAD_ROUTED(133)
Src IP: 10.47.1.12 <-- Local RLOC
Dst IP: 10.47.1.13 <-- Remote RLOC iVxlan dstMac: 0x610:0x00:0x00 iVxlan srcMac: 0x00:0x00:0x00 IPv4 TTL: 0 iid present: 1 lisp iid: 0 lisp flags: 0 dst Port: 4789 update only l3if: 0 is Sgt: 1 is TTL Prop: 0 L3if LE: 0 (0) Port LE: 279 (0) Vlan LE: 7 (0) ==============================================================
언더레이 경로 확인
트래픽은 10.47.1.12를 사용하여 IID 8190을 사용하는 VXLAN에서 캡슐화되며 Gig1/0/1 및 G1/0/2에서 로드 밸런싱될 수 있습니다
Edge-1#show ip route 10.47.1.13
Routing entry for 10.47.1.13/32
Known via "isis", distance 115, metric 30, type level-2
Redistributing via isis
Last update from 10.47.1.4 on GigabitEthernet1/0/2, 2d22h ago
Routing Descriptor Blocks:
10.47.1.4, from 10.47.1.13, 2d22h ago, via GigabitEthernet1/0/2
Route metric is 30, traffic share count is 1
* 10.47.1.0, from 10.47.1.13, 2d22h ago, via GigabitEthernet1/0/1
Route metric is 30, traffic share count is 1
Edge-1#show ip cef 10.47.1.13
10.47.1.13/32
nexthop 10.47.1.0 GigabitEthernet1/0/1
nexthop 10.47.1.4 GigabitEthernet1/0/2
si_hdl, ri_hdl 정보를 가져오려면 show platform software fed switch active ip adj 명령을 사용합니다
Edge-1#show platform software fed switch active ip adj IPV4 Adj entries dest if_name dst_mac si_hdl ri_hdl pd_flags adj_id Last-modified ---- ------- ------- ------ ------ -------- ------ ------------- 225.0.0.0 GigabitEthernet1/0/1 0100.5e00.0000 0x7f65ec958128 0x7f65ec957e18 0x0 0xf80001a1 2023/09/19 17:57:41.399 10.47.1.10 LISP0.4100 4500.0000.0000 0x7f65ec895ed8 0x7f65ec895a68 0x60 0x5c 2023/09/19 17:58:16.545 225.0.0.0 GigabitEthernet1/0/2 0100.5e00.0000 0x7f65ec958f68 0x7f65ec95b2b8 0x0 0xf80001b1 2023/09/19 17:57:41.938 10.47.1.4 GigabitEthernet1/0/2 5254.001c.7de0 0x7f65ec8a5458 0x7f65ec8a4eb8 0x0 0x4c 2023/09/19 17:58:02.150 225.0.0.0 Null0 f800.0011.0000 0x7f65ec3740c8 0x0 0x0 0xf8000011 2023/09/19 17:57:29.404 10.47.1.0 GigabitEthernet1/0/1 5254.000a.42f3 0x7f65ec8b8468 0x7f65ec8b8158 0x0 0x55 2023/09/19 17:58:08.864
Underlay Next-Hop si_hdl Decode
si_hdl(0x7f65ec8a5458)을 확인하려면 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <si_hdl> 명령에서 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec8a5458 1 Handle:0x7f65ec8a5458 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ec8a4eb8Hardware Indices/Handles: index0:0xbc mtu_index/l3u_ri_index0:0x0 index1:0xbc mtu_index/l3u_ri_index1:0x0 Features sharing this resource:66 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 26 00 00 00 00 00 00 00 00 00 00 00 08 00 52 54 00 1c 7d e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Station Index (SI) [0xbc] -----> Contains RI and DI information RI = 0x1a -----> Rewrite Index = MAC address rewrite information for L3 forwarding to the next-hop adjacency DI = 0x526d -----> Destination Index = Outgoing Interface stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD -----> Local Data, indicating that this ASIC is directly connected to the adjacency interface Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- Station Index (SI) [0xbc] -----> Contains RI and DI information RI = 0x1a -----> Rewrite Index = MAC address rewrite information for L3 forwarding to the next-hop adjacency DI = 0x526d -----> Destination Index = Outgoing Interface stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: CD -----> Core Data, indicating that this instance of the ASIC is on the same ASIC, but different core. ==============================================================
Next-Hop Rewrite Index Decode 언더레이
RI(0x1a)를 디코딩하려면 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI> 명령을 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x1a 0x1a ASIC#:0 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) -----> Decimal 26 is hex 0x1a MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, -----> MAC address 5254.001c.7de0 for the next-hop adjacency L3IF LE Index 38 ASIC#:1 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, -----> MAC address 5254.001c.7de0 for the next-hop adjacency L3IF LE Index 38
Next-Hop 목적지 인덱스 디코드 언더레이
DI(0x526d)를 디코딩하려면 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI>에서 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x526d 0x526d ASIC#0: Destination index = 0x526d pmap = 0x00000000 0x00000002 <-- Convert decimal 2 to binary, which is 0010. Count this binary right to left, zero-based, so Port 1. pmap_intf : [GigabitEthernet1/0/2] cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0 ASIC#1: Destination index = 0x526d pmap = 0x00000000 0x00000000 cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0
Edge-1#show platform software fed switch active ifm mappings Interface IF_ID Inst Asic Core Port SubPort Mac Cntx LPN GPN Type Active GigabitEthernet1/0/1 0x1a 0 0 0 0 0 1 0 1 1 NIF Y GigabitEthernet1/0/2 0x1b 0 0 0 1 0 2 1 2 2 NIF Y <-- Port 1 lines up to G1/0/2 GigabitEthernet1/0/3 0xb 0 0 0 2 0 3 2 3 3 NIF Y GigabitEthernet1/0/4 0xc 0 0 0 3 0 4 3 4 4 NIF Y GigabitEthernet1/0/5 0xd 0 0 0 4 0 5 4 5 5 NIF Y GigabitEthernet1/0/6 0xe 0 0 0 5 0 6 5 6 6 NIF Y GigabitEthernet1/0/7 0xf 0 0 0 6 0 7 6 7 7 NIF Y GigabitEthernet1/0/8 0x10 0 0 0 7 0 8 7 8 8 NIF Y
Next-Hop ri_hdl Decode 언더레이
show platform hardware fed switch active fwd-asic abstraction print-resource-handle (ri_hdl) 1에서 ri_hdl(0x7f65ec8a4eb8)을 디코딩하려면
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec8a4eb8 1 Handle:0x7f65ec8a4eb8 Res-Type:ASIC_RSC_RI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ec903b28Hardware Indices/Handles: index0:0x1a mtu_index/l3u_ri_index0:0x0 index1:0x1a mtu_index/l3u_ri_index1:0x0 Features sharing this resource:66 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 26 00 00 00 00 00 00 00 00 00 00 00 08 00 52 54 00 1c 7d e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- ASIC#:0 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) <-- Decimal 26 is 0x1a in hex MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, <-- MAC address 5254.001c.7de0 for the next-hop adjacency L3IF LE Index 38 Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- ASIC#:1 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)<-- Decimal 26 is 0x1a in hex MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, MAC Addr: MAC Addr: 52:54:00:1c:7d:e0,<-- MAC address 5254.001c.7de0 for the next-hop adjacency
L3IF LE Index 38 ==============================================================
SDA 패브릭의 기본 호스트 연결성(서로 다른 VLAN/동일한 VN)
이 절에서는 10.47.4.2와 10.47.10.2 사이의 의사소통을 살펴본다. 이러한 호스트는 서로 다른 VLAN에 속하므로 둘 다 기본 게이트웨이를 가리키는 기본 게이트웨이를 구성해야 합니다. 10.47.4.2의 경우 10.47.4.1이고 10.47.10.2의 경우 10.47.10.1입니다.
1단계. 엔드포인트와 기본 게이트웨이 간의 연결이 작동하는지 확인합니다.
Edge-1#ping vrf red_vn 10.47.4.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.47.4.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 155/164/181 ms
Edge-2#ping vrf red_vn 10.47.10.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.47.10.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 41/46/62 ms
2단계. 10.47.4.2의 패킷이 Edge-1에서 성공적으로 수신되는지 확인합니다.
패킷은 10.47.4.2를 향하는 인그레스 인터페이스에서 캡처할 수 있습니다.
Edge-1#monitor capture 1 interface g1/0/3 in match any Edge-1#mon cap 1 start Started capture point : 1 Edge-1#mon cap 1 stop Capture statistics collected at software: Capture duration - 12 seconds Packets received - 9 Packets dropped - 0 Packets oversized - 0 Number of Bytes dropped at asic not collected Capture buffer will exists till exported or cleared Stopped capture point : 1
Edge-1#show monitor capture 1 buffer brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit 1 0.000000 10.47.4.2 -> 10.47.10.2 ICMP 98 Echo (ping) request id=0x0041, seq=0/0, ttl=64 2 0.023447 10.47.4.2 -> 10.47.10.2 ICMP 98 Echo (ping) request id=0x0041, seq=0/0, ttl=64
Edge-1#show monitor capture 1 buffer detailed Starting the packet display ........ Press Ctrl + Shift + 6 to exit Frame 1: 98 bytes on wire (784 bits), 98 bytes captured (784 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0 Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe) Interface name: /tmp/epc_ws/wif_to_ts_pipe Encapsulation type: Ethernet (1) Arrival Time: Oct 11, 2023 15:27:46.033825000 UTC [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1697038066.033825000 seconds [Time delta from previous captured frame: 0.000000000 seconds] [Time delta from previous displayed frame: 0.000000000 seconds] [Time since reference or first frame: 0.000000000 seconds] Frame Number: 1 Frame Length: 98 bytes (784 bits) Capture Length: 98 bytes (784 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:icmp:data] Ethernet II, Src: 52:54:00:19:93:e9 (52:54:00:19:93:e9), Dst: 00:00:0c:9f:f3:41 (00:00:0c:9f:f3:41) <-- SMAC and DMAC respectively Destination: 00:00:0c:9f:f3:41 (00:00:0c:9f:f3:41) Address: 00:00:0c:9f:f3:41 (00:00:0c:9f:f3:41) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Source: 52:54:00:19:93:e9 (52:54:00:19:93:e9) Address: 52:54:00:19:93:e9 (52:54:00:19:93:e9) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.4.2, Dst: 10.47.10.2 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 84 Identification: 0x395e (14686) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 64 Protocol: ICMP (1) Header checksum: 0xdee9 [validation disabled] [Header checksum status: Unverified] Source: 10.47.4.2 Destination: 10.47.10.2 Internet Control Message Protocol Type: 8 (Echo (ping) request) Code: 0 Checksum: 0x248a [correct] [Checksum Status: Good] Identifier (BE): 65 (0x0041) Identifier (LE): 16640 (0x4100) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) 0000 2a 46 a8 ee 00 00 00 00 00 00 00 00 00 00 00 00 *F.............. 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0030 00 00 00 00 00 00 00 00 ........ Data: 2a46a8ee0000000000000000000000000000000000000000b^@& [Length: 56]
3단계 - LISP 조회
인그레스 에지 노드는 패킷을 전송하는 HOST-03의 위치(RLOC)를 결정해야 합니다. 이 경우 엔드 호스트 HOST-03이 다른 VLAN(동일한 VN/VRF: USERS)에 있는 것처럼 LISP IPv4 인스턴스는 조회가 IP 주소(MAC 주소는 에지 노드 자체에 속함)를 기반으로 하기 때문에 사용됩니다.
Edge-1#debug lisp control-plane all
LISP[REMT ]-0: Map Request: Sending request for IID 4099 EID 10.47.10.2/32, requester 'remote EID prefix'. LISP[REMT ]-0: Map-Reply nonce matches pending request for IID 4099 EID 10.47.10.2/32, requester 'remote EID prefix'.
LISP 맵 요청이 제어 노드(LISP 맵 서버) Border-1에 도달함:
Border-1#debug lisp control-plane all
LISP[TRNSP]-0: Processing received Map-Request(1) message on GigabitEthernet1/0/3 from 10.47.10.2:4342 to 10.47.10.2:4342.
LISP[MR ]-0: Received Map-Request with 1 records, first EID IID 4099 10.47.10.2/32, source EID 10.47.4.2, nonce 0x1CFAB931-0x8207CB93. LISP[MR ]-0 IID 4099 IPv4: MS EID 10.47.10.2/32: Sending proxy reply to 10.47.1.12.
LISP 맵 회신 에지 노드에 도달:
LISP[REMT ]-0: Processing Map-Reply mapping record for IID 4099 IPv4 10.47.10.2/32 LCAF 2, ttl 1440, action none, not authoritative, 1 locator. LISP[REMT ]-0: Processing mapping information for EID prefix IID 4099 10.47.10.2/32.
패브릭 에지는 10.47.10.2에 대한 RLOC를 쿼리하고 맵 응답을 처리합니다
LISP[REMT ]-0: Map Request: Sending request for IID 4099 EID 10.47.10.2/32, requester 'remote EID RLOC'.
LISP[REMT ]-0: Processing Map-Reply mapping record for IID 4099 IPv4 10.47.10.2/32 LCAF 2, ttl 1440, action none, authoritative, 1 locator. LISP[REMT ]-0: Processing mapping information for EID prefix IID 4099 10.47.10.2/32.
엔트리가 없는 경우 LISP 프로세스 관점에서 디버그를 수집해야 합니다. LISP(LISP Grouper)라는 툴도 있습니다. 이 툴은 수동으로 LISP 프로세스를 트리거하는 데 사용할 수 있습니다(두 제어 노드 간의 이중화된 제어 노드 컨피그레이션 및 데이터베이스 일관성을 테스트하는 매우 효과적인 방법).
Edge-1#lig instance-id 4099 10.47.10.2 to 10.47.1.10 Mapping information for EID 10.47.10.2 from 10.47.1.10 with RTT 334 msecs 10.47.10.2/32, uptime: 00:00:00, expires: 23:59:59, via map-reply, complete Locator Uptime State Pri/Wgt Encap-IID 10.47.1.13 00:00:00 up 10/10 -
Edge-1#lig instance-id 4099 10.47.10.2 to 10.47.1.11 Mapping information for EID 10.47.10.2 from 10.47.1.11 with RTT 327 msecs 10.47.10.2/32, uptime: 00:00:06, expires: 23:59:59, via map-reply, complete Locator Uptime State Pri/Wgt Encap-IID 10.47.1.13 00:00:06 up 10/10 -
경로 확인
CEF는 LISP를 사용하며, LISP는 수신한 맵 캐시 항목을 사용합니다
Edge-1#show ip cef vrf red_vn 10.47.10.2 10.47.10.2/32 nexthop 10.47.1.13 LISP0.4099
Edge-1#show ip route 10.47.1.13 Routing entry for 10.47.1.13/32 Known via "isis", distance 115, metric 30, type level-2 Redistributing via isis Last update from 10.47.1.4 on GigabitEthernet1/0/2, 3d19h ago Routing Descriptor Blocks: 10.47.1.4, from 10.47.1.13, 3d19h ago, via GigabitEthernet1/0/2 Route metric is 30, traffic share count is 1 * 10.47.1.0, from 10.47.1.13, 3d19h ago, via GigabitEthernet1/0/1 Route metric is 30, traffic share count is 1
Edge-1#show lisp instance-id 4099 ipv4 map-cache 10.47.10.2 LISP IPv4 Mapping Cache for LISP 0 EID-table vrf red_vn (IID 4099), 1 entries 10.47.10.2/32, uptime: 00:08:48, expires: 23:51:17, via map-reply, complete Sources: map-reply State: complete, last modified: 00:08:48, map-source: 10.47.1.11 Active, Packets out: 51(29376 bytes), counters are not accurate (~ 00:00:15 ago) Encapsulating dynamic-EID traffic Locator Uptime State Pri/Wgt Encap-IID 10.47.1.13 00:08:48 up 10/10 - Last up-down state change: 00:08:48, state change count: 1 Last route reachability change: 22:07:12, state change count: 1 Last priority / weight change: never/never RLOC-probing loc-status algorithm: Last RLOC-probe sent: 00:08:48 (rtt 931ms)
LISP Next-Hop 확인
이 패킷은 VXLAN에서 캡슐화되므로 LISP next-hop을 확인해야 합니다. 명령 show platform software fed switch active ip adj를 사용하여 10.47.1.13, LISP next-hop에 대한 추가 정보를 얻습니다
Edge-1#show platform software fed switch active ip adj IPV4 Adj entries dest if_name dst_mac si_hdl ri_hdl pd_flags adj_id Last-modified ---- ------- ------- ------ ------ -------- ------ ------------- 10.47.1.10 LISP0.4100 4500.0000.0000 0x7f65ec895ed8 0x7f65ec895a68 0x60 0x5c 2023/09/19 17:58:16.545 10.47.1.4 GigabitEthernet1/0/2 5254.001c.7de0 0x7f65ec8a5458 0x7f65ec8a4eb8 0x0 0x4c 2023/09/19 17:58:02.150 10.47.1.0 GigabitEthernet1/0/1 5254.000a.42f3 0x7f65ec8b8468 0x7f65ec8b8158 0x0 0x55 2023/09/19 17:58:08.864 10.47.4.2 Vlan1026 5254.0019.93e9 0x7f65ec7c21f8 0x7f65ec7c2498 0x0 0x1a 2023/09/19 23:59:34.081 10.47.1.13 LISP0.4099 4500.0000.0000 0x7f65ed00f668 0x7f65ed00fd58 0x60 0x20 2023/10/11 15:36:06.243
LISP Next-Hop si_hdl 디코딩
si_hdl (0x7f65ed00f668)을 사용하여 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <si_hdl> 1에 사용하십시오.
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ed00f668 1 Handle:0x7f65ed00f668 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_LISP Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ed00fd58Hardware Indices/Handles: index0:0xc8 mtu_index/l3u_ri_index0:0x0 index1:0xc8 mtu_index/l3u_ri_index1:0x0 Features sharing this resource:109 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 38 5f 84 ec 0a 2f 01 0d ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Station Index (SI) [0xc8] <-- Contains the RI and DI RI = 0x2c <-- Rewrite Index contains information for L3 Forwarding DI = 0x5012 <-- Destination Index contains information for the destination port stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0xc rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD Detailed Resource Information (ASIC_INSTANCE# 1) ----------------------------------------
Station Index (SI) [0xc8] <-- Contains the RI and DI
RI = 0x2c <-- Rewrite Index contains information for L3 Forwarding
DI = 0x5013 <-- Destination Index contains information for the destination port stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0xc rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD ==============================================================
LISP Next-Hop RI 디코딩
RI(0x2c)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI>에 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x2c 0x2c ASIC#:0 RI:44 Rewrite_type:AL_RRM_REWRITE_IPV4_VXLAN_INNER_IPV4_ENCAP(110) Mapped_rii:LVX_L3_ENCAP_L2_PAYLOAD(123) Dst Mac: MAC Addr: ba:25:cd:f4:ad:38, Src IP: 10.47.1.12 <-- Local RLOC Dst IP: 10.47.1.13 <-- RLOC of Edge-2 IPv4 TTL: 0 LISP INSTANCEID: 0 L3IF LE Index: 46 ASIC#:1 RI:44 Rewrite_type:AL_RRM_REWRITE_IPV4_VXLAN_INNER_IPV4_ENCAP(110) Mapped_rii:LVX_L3_ENCAP_L2_PAYLOAD(123) Dst Mac: MAC Addr: ba:25:cd:f4:ad:38,
Src IP: 10.47.1.12 <-- Local RLOC
Dst IP: 10.47.1.13 <-- RLOC of Edge-2 IPv4 TTL: 0 LISP INSTANCEID: 0 L3IF LE Index: 46
LISP Next-Hop DI Decode
DI(0x5012)를 받아 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI>에 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x5012 0x5012 ASIC#0:
Destination index = 0x5012 DI_RCP_PORT1 <-- Expected, this means the packet is recirculated for VXLAN imposition
pmap = 0x00000000 0x00000000
cmi = 0x0
rcp_pmap = 0x1
al_rsc_cmi
CPU Map Index (CMI) [0]
ctiLo0 = 0
ctiLo1 = 0
ctiLo2 = 0
cpuQNum0 = 0
cpuQNum1 = 0
cpuQNum2 = 0
npuIndex = 0
stripSeg = 0
copySeg = 0
ASIC#1:
Destination index = 0x5012 DI_RCP_PORT1 <-- Expected, this means the packet is recirculated for VXLAN imposition
pmap = 0x00000000 0x00000000
cmi = 0x0
rcp_pmap = 0x0
al_rsc_cmi
CPU Map Index (CMI) [0]
ctiLo0 = 0
ctiLo1 = 0
ctiLo2 = 0
cpuQNum0 = 0
cpuQNum1 = 0
cpuQNum2 = 0
npuIndex = 0
stripSeg = 0
copySeg = 0
LISP Next-Hop ri_hdl 디코딩
ri_hdl (0x7f65ed00fd58)을 가져와서 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <ri_hdl> 명령에서 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ed00fd58 1 Handle:0x7f65ed00fd58 Res-Type:ASIC_RSC_RI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_LISP Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ed00b618Hardware Indices/Handles: index0:0x2c mtu_index/l3u_ri_index0:0x0 index1:0x2c mtu_index/l3u_ri_index1:0x0 Features sharing this resource:109 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 2e 00 00 00 0a 2f 01 0d ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- ASIC#:0 RI:44 Rewrite_type:AL_RRM_REWRITE_IPV4_VXLAN_INNER_IPV4_ENCAP(110) Mapped_rii:LVX_L3_ENCAP_L2_PAYLOAD(123) Dst Mac: MAC Addr: ba:25:cd:f4:ad:38, Src IP: 10.47.1.12 <-- Local RLOC Dst IP: 10.47.1.13 <-- Edge-2 RLOC IPv4 TTL: 0 LISP INSTANCEID: 0 L3IF LE Index: 46 Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- ASIC#:1 RI:44 Rewrite_type:AL_RRM_REWRITE_IPV4_VXLAN_INNER_IPV4_ENCAP(110) Mapped_rii:LVX_L3_ENCAP_L2_PAYLOAD(123) Dst Mac: MAC Addr: ba:25:cd:f4:ad:38,
Src IP: 10.47.1.12 <-- Local RLOC
Dst IP: 10.47.1.13 <-- Edge-2 RLOC IPv4 TTL: 0 LISP INSTANCEID: 0 L3IF LE Index: 46 ==============================================================
언더레이 Next-Hop 확인
LISP Next-Hop에 도달하기 위해 언더레이에 가능한 두 가지 경로가 있으며, 한 경로에 대해 검증이 발생하며, 다른 언더레이 Next-Hop의 검증에도 동일한 논리가 적용됩니다.
Edge-1#show ip route 10.47.1.13
Routing entry for 10.47.1.13/32
Known via "isis", distance 115, metric 30, type level-2
Redistributing via isis
Last update from 10.47.1.4 on GigabitEthernet1/0/2, 3d19h ago
Routing Descriptor Blocks:
10.47.1.4, from 10.47.1.13, 3d19h ago, via GigabitEthernet1/0/2
Route metric is 30, traffic share count is 1
* 10.47.1.0, from 10.47.1.13, 3d19h ago, via GigabitEthernet1/0/1
Route metric is 30, traffic share count is 1
다음 홉에 대한 자세한 내용을 보려면 show platform software fed switch active ip adj를 사용하십시오
Edge-1#show platform software fed switch active ip adj IPV4 Adj entries dest if_name dst_mac si_hdl ri_hdl pd_flags adj_id Last-modified ---- ------- ------- ------ ------ -------- ------ ------------- 10.47.1.4 GigabitEthernet1/0/2 5254.001c.7de0 0x7f65ec8a5458 0x7f65ec8a4eb8 0x0 0x4c 2023/09/19 17:58:02.150 10.47.1.0 GigabitEthernet1/0/1 5254.000a.42f3 0x7f65ec8b8468 0x7f65ec8b8158 0x0 0x55 2023/09/19 17:58:08.864 <snip>
Underlay Next-Hop si_hdl Decode
si_hdl (0x7f65ec8a5458)을 가져와서 명령 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <si_hdl> 1에 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec8a5458 1 Handle:0x7f65ec8a5458 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ec8a4eb8Hardware Indices/Handles: index0:0xbc mtu_index/l3u_ri_index0:0x0 index1:0xbc mtu_index/l3u_ri_index1:0x0 Features sharing this resource:66 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 26 00 00 00 00 00 00 00 00 00 00 00 08 00 52 54 00 1c 7d e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Station Index (SI) [0xbc] <-- Contains the RI and DI RI = 0x1a <-- Rewrite index contains information for L3 Forwarding DI = 0x526d <-- Destination index contains information for the destination port stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: LD Detailed Resource Information (ASIC_INSTANCE# 1) ----------------------------------------
Station Index (SI) [0xbc] <-- Contains the RI and DI
RI = 0x1a <-- Rewrite index contains information for L3 Forwarding
DI = 0x526d <-- Destination index contains information for the destination port stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0 Replication Bitmap: CD ==============================================================
Next-Hop RI Decode 언더레이
RI(0x1a)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI> 명령을 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x1a 0x1a ASIC#:0 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) <-- Decimal 26 is hex 0x1a MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, <-- MAC Address 5254.001c.7de0 corresponds to the next-hop L3IF LE Index 38 ASIC#:1 RI:26 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9)<-- Decimal 26 is hex 0x1a MAC Addr: MAC Addr: 52:54:00:1c:7d:e0, <-- MAC Address 5254.001c.7de0 corresponds to the next-hop L3IF LE Index 38
다음 홉 DI 디코드 언더레이
DI(0x526d)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI> 명령을 사용합니다.
Edge-1#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x526d 0x526d ASIC#0: Destination index = 0x526d pmap = 0x00000000 0x00000002 <-- Take decimal 2 and convert to binary, so 0010, and then count this binary right to left zero-based, so Port 1 pmap_intf : [GigabitEthernet1/0/2] cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0 ASIC#1: Destination index = 0x526d pmap = 0x00000000 0x00000000 cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0
Edge-1#show platform software fed switch active ifm mappings Interface IF_ID Inst Asic Core Port SubPort Mac Cntx LPN GPN Type Active GigabitEthernet1/0/1 0x1a 0 0 0 0 0 1 0 1 1 NIF Y GigabitEthernet1/0/2 0x1b 0 0 0 1 0 2 1 2 2 NIF Y <-- Port 1 maps to Gig1/0/2 GigabitEthernet1/0/3 0xb 0 0 0 2 0 3 2 3 3 NIF Y GigabitEthernet1/0/4 0xc 0 0 0 3 0 4 3 4 4 NIF Y GigabitEthernet1/0/5 0xd 0 0 0 4 0 5 4 5 5 NIF Y GigabitEthernet1/0/6 0xe 0 0 0 5 0 6 5 6 6 NIF Y GigabitEthernet1/0/7 0xf 0 0 0 6 0 7 6 7 7 NIF Y GigabitEthernet1/0/8 0x10 0 0 0 7 0 8 7 8 8 NIF Y
Next-Hop ri_hdl Decode 언더레이
ri_hdl (0x7f65ec8b8158)을 가져와서 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <ri_hdl> 명령에서 사용합니다. 1
Edge-1#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f65ec8b8158 1 Handle:0x7f65ec8b8158 Res-Type:ASIC_RSC_RI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:1 priv_ri/priv_si Handle: 0x7f65ec7a6338Hardware Indices/Handles: index0:0x1b mtu_index/l3u_ri_index0:0x0 index1:0x1b mtu_index/l3u_ri_index1:0x0 Features sharing this resource:66 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 25 00 00 00 00 00 00 00 00 00 00 00 08 00 52 54 00 0a 42 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- ASIC#:0 RI:27 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) MAC Addr: MAC Addr: 52:54:00:0a:42:f3, L3IF LE Index 37 Detailed Resource Information (ASIC_INSTANCE# 1) ---------------------------------------- ASIC#:1 RI:27 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) MAC Addr: MAC Addr: 52:54:00:0a:42:f3, L3IF LE Index 37 ==============================================================
패킷은 VXLAN에서 캡슐화되고 로드 밸런싱 규칙에 따라 전송됩니다. EPC(Embedded Packet Capture)를 사용하여 모든 인터페이스의 트래픽을 동시에 캡처할 수 있습니다. 이때 패킷은 VXLAN으로 캡슐화되며, EPC 필터는 내부 IPv4 주소가 아니라 RLOC에서 RLOC으로 가는 것에 맞아야 합니다.
Edge-1#monitor capture 1 interface range g1/0/1-2 out match ipv4 host 10.47.1.12 host 10.47.1.13 Edge-1#monitor capture 1 start Started capture point : 1 Edge-1# Edge-1#monitor capture 1 stop Capture statistics collected at software: Capture duration - 18 seconds Packets received - 4 Packets dropped - 0 Packets oversized - 0 Number of Bytes dropped at asic not collected Capture buffer will exists till exported or cleared Stopped capture point : 1
Edge-1#show monitor capture 1 buffer brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit 1 0.000000 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0046, seq=0/0, ttl=63 2 0.980849 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0046, seq=1/256, ttl=63 3 1.984077 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0046, seq=2/512, ttl=63 4 2.999989 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0046, seq=3/768, ttl=63
Edge-1#show monitor capture 1 buffer detailed Starting the packet display ........ Press Ctrl + Shift + 6 to exit Frame 1: 148 bytes on wire (1184 bits), 148 bytes captured (1184 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0 Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe) Interface name: /tmp/epc_ws/wif_to_ts_pipe Encapsulation type: Ethernet (1) Arrival Time: Oct 11, 2023 16:50:52.262553000 UTC [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1697043052.262553000 seconds [Time delta from previous captured frame: 0.000000000 seconds] [Time delta from previous displayed frame: 0.000000000 seconds] [Time since reference or first frame: 0.000000000 seconds] Frame Number: 1 Frame Length: 148 bytes (1184 bits) Capture Length: 148 bytes (1184 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:udp:vxlan:eth:ethertype:ip:icmp:data] Ethernet II, Src: 00:00:00:00:00:00 (00:00:00:00:00:00), Dst: 00:00:00:00:00:00 (00:00:00:00:00:00) <-- EPC does not capture L3 rewrite on egress properly, this is OK Destination: 00:00:00:00:00:00 (00:00:00:00:00:00) Address: 00:00:00:00:00:00 (00:00:00:00:00:00) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Source: 00:00:00:00:00:00 (00:00:00:00:00:00) Address: 00:00:00:00:00:00 (00:00:00:00:00:00) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.1.12, Dst: 10.47.1.13 <-- RLOC to RLOC 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 134 Identification: 0x1d6f (7535) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 64 Protocol: UDP (17) Header checksum: 0x0682 [validation disabled] [Header checksum status: Unverified] Source: 10.47.1.12 Destination: 10.47.1.13 User Datagram Protocol, Src Port: 65354, Dst Port: 4789 Source Port: 65354 Destination Port: 4789 Length: 114 [Checksum: [missing]] [Checksum Status: Not present] [Stream index: 0] [Timestamps] [Time since first frame: 0.000000000 seconds] [Time since previous frame: 0.000000000 seconds] Virtual eXtensible Local Area Network Flags: 0x8800, GBP Extension, VXLAN Network ID (VNI) 1... .... .... .... = GBP Extension: Defined .... .... .0.. .... = Don't Learn: False .... 1... .... .... = VXLAN Network ID (VNI): True .... .... .... 0... = Policy Applied: False .000 .000 0.00 .000 = Reserved(R): 0x0000 Group Policy ID: 0 VXLAN Network Identifier (VNI): 4099 <-- LISP L3 IID Reserved: 0 Ethernet II, Src: 00:00:00:00:61:00 (00:00:00:00:61:00), Dst: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) <-- Dummy Ethernet header for VXLAN Destination: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) Address: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Source: 00:00:00:00:61:00 (00:00:00:00:61:00) Address: 00:00:00:00:61:00 (00:00:00:00:61:00) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.4.2, Dst: 10.47.10.2 <-- True IPv4 addresses 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 84 Identification: 0x92f6 (37622) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 63 Protocol: ICMP (1) Header checksum: 0x8651 [validation disabled] [Header checksum status: Unverified] Source: 10.47.4.2 Destination: 10.47.10.2 Internet Control Message Protocol Type: 8 (Echo (ping) request) Code: 0 Checksum: 0xa383 [correct] [Checksum Status: Good] Identifier (BE): 70 (0x0046) Identifier (LE): 17920 (0x4600) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) 0000 78 1e dc 17 00 00 00 00 00 00 00 00 00 00 00 00 x............... 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0030 00 00 00 00 00 00 00 00 ........ Data: 781edc170000000000000000000000000000000000000000b^@& [Length: 56]
캡슐화된 VXLAN 패킷이 Edge-2에 도달함:
Edge-2#monitor capture 1 interface range g1/0/1-2 in match ipv4 host 10.47.1.12 host 10.47.1.13 Edge-2#monitor capture 1 start Started capture point : 1 Edge-2#monitor capture 1 stop Capture statistics collected at software: Capture duration - 7 seconds Packets received - 6 Packets dropped - 0 Packets oversized - 0 Number of Bytes dropped at asic not collected Capture buffer will exists till exported or cleared Stopped capture point : 1
Edge-2#show monitor capture 1 buffer brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit 1 0.000000 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=0/0, ttl=63 2 0.007826 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=0/0, ttl=63 3 0.086345 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=1/256, ttl=63 4 0.097490 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=1/256, ttl=63 5 1.150969 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=2/512, ttl=63 6 1.163817 10.47.4.2 -> 10.47.10.2 ICMP 148 Echo (ping) request id=0x0047, seq=2/512, ttl=63
Edge-2#show monitor capture 1 buffer detailed Starting the packet display ........ Press Ctrl + Shift + 6 to exit Frame 1: 148 bytes on wire (1184 bits), 148 bytes captured (1184 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0 Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe) Interface name: /tmp/epc_ws/wif_to_ts_pipe Encapsulation type: Ethernet (1) Arrival Time: Oct 11, 2023 16:58:12.702159000 UTC [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1697043492.702159000 seconds [Time delta from previous captured frame: 0.000000000 seconds] [Time delta from previous displayed frame: 0.000000000 seconds] [Time since reference or first frame: 0.000000000 seconds] Frame Number: 1 Frame Length: 148 bytes (1184 bits) Capture Length: 148 bytes (1184 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:udp:vxlan:eth:ethertype:ip:icmp:data] Ethernet II, Src: 52:54:00:0a:42:11 (52:54:00:0a:42:11), Dst: 52:54:00:17:fe:65 (52:54:00:17:fe:65) <-- True MAC addresses post L3 rewrite Destination: 52:54:00:17:fe:65 (52:54:00:17:fe:65) Address: 52:54:00:17:fe:65 (52:54:00:17:fe:65) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Source: 52:54:00:0a:42:11 (52:54:00:0a:42:11) Address: 52:54:00:0a:42:11 (52:54:00:0a:42:11) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.1.12, Dst: 10.47.1.13 <-- RLOC to RLOC 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 134 Identification: 0x1d7b (7547) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 62 Protocol: UDP (17) Header checksum: 0x0876 [validation disabled] [Header checksum status: Unverified] Source: 10.47.1.12 Destination: 10.47.1.13 User Datagram Protocol, Src Port: 65354, Dst Port: 4789 Source Port: 65354 Destination Port: 4789 Length: 114 [Checksum: [missing]] [Checksum Status: Not present] [Stream index: 0] [Timestamps] [Time since first frame: 0.000000000 seconds] [Time since previous frame: 0.000000000 seconds] Virtual eXtensible Local Area Network Flags: 0x8800, GBP Extension, VXLAN Network ID (VNI) 1... .... .... .... = GBP Extension: Defined .... .... .0.. .... = Don't Learn: False .... 1... .... .... = VXLAN Network ID (VNI): True .... .... .... 0... = Policy Applied: False .000 .000 0.00 .000 = Reserved(R): 0x0000 Group Policy ID: 0 VXLAN Network Identifier (VNI): 4099 <-- LISP L3 IID Reserved: 0 Ethernet II, Src: 00:00:00:00:61:00 (00:00:00:00:61:00), Dst: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) <-- Dummy Ethernet header for VXLAN Destination: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) Address: ba:25:cd:f4:ad:38 (ba:25:cd:f4:ad:38) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Source: 00:00:00:00:61:00 (00:00:00:00:61:00) Address: 00:00:00:00:61:00 (00:00:00:00:61:00) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.4.2, Dst: 10.47.10.2 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 84 Identification: 0x1abb (6843) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 63 Protocol: ICMP (1) Header checksum: 0xfe8c [validation disabled] [Header checksum status: Unverified] Source: 10.47.4.2 Destination: 10.47.10.2 Internet Control Message Protocol Type: 8 (Echo (ping) request) Code: 0 Checksum: 0x044f [correct] [Checksum Status: Good] Identifier (BE): 71 (0x0047) Identifier (LE): 18176 (0x4700) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) 0000 e8 37 0b 32 00 00 00 00 00 00 00 00 00 00 00 00 .7.2............ 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0030 00 00 00 00 00 00 00 00 ........ Data: e8370b320000000000000000000000000000000000000000b^@& [Length: 56]
Edge-2는 VXLAN 헤더의 압축을 풀고 ARP 테이블을 참조하여 ICMP 요청을 10.47.10.2로 전달합니다
Edge-2#show ip cef vrf red_vn 10.47.10.2 10.47.10.2/32 nexthop 10.47.10.2 Vlan1028
Edge-2#show platform software fed switch active ip adj IPV4 Adj entries dest if_name dst_mac si_hdl ri_hdl pd_flags adj_id Last-modified ---- ------- ------- ------ ------ -------- ------ ------------- 10.47.10.2 Vlan1028 5254.0002.cbf5 0x7f5744f89988 0x7f5744f8afa8 0x0 0x26 2023/10/09 18:57:59.026
<snip>
엔드포인트 si_hdl 디코딩
si_hdl (0x7f5744f89988)을 사용하여 show platform hardware fed switch active fwd-asic abstraction print-resource-handle <si_hdl> 1에 사용하십시오.
Edge-2#show platform hardware fed switch active fwd-asic abstraction print-resource-handle 0x7f5744f89988 1 Handle:0x7f5744f89988 Res-Type:ASIC_RSC_SI Res-Switch-Num:255 Asic-Num:255 Feature-ID:AL_FID_L3_UNICAST_IPV4 Lkp-ftr-id:LKP_FEAT_INVALID ref_count:2 priv_ri/priv_si Handle: 0x7f5744f8afa8Hardware Indices/Handles: index0:0xc8 mtu_index/l3u_ri_index0:0x0 index1:0xc8 mtu_index/l3u_ri_index1:0x0 Features sharing this resource:66 (1)] 57 (1)] Cookie length: 56 00 00 00 00 00 00 00 00 04 04 00 00 00 00 00 00 00 00 00 00 07 00 52 54 00 02 cb f5 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Detailed Resource Information (ASIC_INSTANCE# 0) ---------------------------------------- Station Index (SI) [0xc8] <-- Station Index contains RI and DI RI = 0x2c <-- Rewrite Index contains information for L2 Forwarding DI = 0x526e <-- Rewrite Index contains destination port information stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0x1 Replication Bitmap: LD Detailed Resource Information (ASIC_INSTANCE# 1) ----------------------------------------
Station Index (SI) [0xc8] <-- Station Index contains RI and DI
RI = 0x2c <-- Rewrite Index contains information for L2 Forwarding
DI = 0x526e <-- Rewrite Index contains destination port information stationTableGenericLabel = 0 stationFdConstructionLabel = 0x7 lookupSkipIdIndex = 0 rcpServiceId = 0 dejaVuPreCheckEn = 0x1 Replication Bitmap: CD ==============================================================
엔드포인트 RI 디코드
RI(0x2c)를 가져와서 show platform hardware fed switch active fwd-asic resource asic all rewrite-index range <RI> <RI> 명령을 사용합니다.
Edge-2#show platform hardware fed switch active fwd-asic resource asic all rewrite-index range 0x2c 0x2c ASIC#:0 RI:44 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) <-- Decimal 44 is hex 0x2c MAC Addr: MAC Addr: 52:54:00:02:cb:f5, <-- MAC Address 5254.0002.cbf5 is 10.47.10.2 L3IF LE Index 50 ASIC#:1 RI:44 Rewrite_type:AL_RRM_REWRITE_L3_UNICAST_IPV4_SHARED(1) Mapped_rii:L3_UNICAST_IPV4(9) <-- Decimal 44 is hex 0x2c MAC Addr: MAC Addr: 52:54:00:02:cb:f5,<-- MAC Address 5254.0002.cbf5 is 10.47.10.2 L3IF LE Index 50
엔드포인트 DI 디코드
DI(0x526e)를 받아 show platform hardware fed switch active fwd-asic resource asic all destination-index range <DI> <DI>에 사용합니다.
Edge-2#show platform hardware fed switch active fwd-asic resource asic all destination-index range 0x526e 0x526e ASIC#0: Destination index = 0x526e pmap = 0x00000000 0x00000010 <-- Convert 10 into binary, 0001 and 0000, so 00010000, and count from right to left, zero-based, so Port 4 pmap_intf : [GigabitEthernet1/0/5] cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0 ASIC#1: Destination index = 0x526e pmap = 0x00000000 0x00000000 cmi = 0x0 rcp_pmap = 0x0 al_rsc_cmi CPU Map Index (CMI) [0] ctiLo0 = 0 ctiLo1 = 0 ctiLo2 = 0 cpuQNum0 = 0 cpuQNum1 = 0 cpuQNum2 = 0 npuIndex = 0 stripSeg = 0 copySeg = 0
Edge-2#show platform software fed switch active ifm mappings Interface IF_ID Inst Asic Core Port SubPort Mac Cntx LPN GPN Type Active GigabitEthernet1/0/1 0x1a 0 0 0 0 0 1 0 1 1 NIF Y GigabitEthernet1/0/2 0x1b 0 0 0 1 0 2 1 2 2 NIF Y GigabitEthernet1/0/3 0xb 0 0 0 2 0 3 2 3 3 NIF Y GigabitEthernet1/0/4 0xc 0 0 0 3 0 4 3 4 4 NIF Y GigabitEthernet1/0/5 0xd 0 0 0 4 0 5 4 5 5 NIF Y <-- Port 4 corresponds to Gig1/0/5 GigabitEthernet1/0/6 0xe 0 0 0 5 0 6 5 6 6 NIF Y GigabitEthernet1/0/7 0xf 0 0 0 6 0 7 6 7 7 NIF Y GigabitEthernet1/0/8 0x10 0 0 0 7 0 8 7 8 8 NIF Y
Edge-2는 패킷을 역캡슐화하여 HOST-03이 연결된 이그레스 인터페이스로 전송합니다.
Edge-2#monitor capture 1 interface g1/0/5 out match ipv4 host 10.47.4.2 host 10.47.10.2 Edge-2#monitor capture 1 start Started capture point : 1 Edge-2#monitor capture 1 stop Capture statistics collected at software: Capture duration - 6 seconds Packets received - 3 Packets dropped - 0 Packets oversized - 0 Number of Bytes dropped at asic not collected Capture buffer will exists till exported or cleared Stopped capture point : 1
Edge-2#show monitor capture 1 buffer brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit 1 0.000000 10.47.4.2 -> 10.47.10.2 ICMP 106 Echo (ping) request id=0x0048, seq=0/0, ttl=62 2 0.984985 10.47.4.2 -> 10.47.10.2 ICMP 106 Echo (ping) request id=0x0048, seq=1/256, ttl=62 3 1.985357 10.47.4.2 -> 10.47.10.2 ICMP 106 Echo (ping) request id=0x0048, seq=2/512, ttl=62
Edge-2#show monitor capture 1 buffer detailed Starting the packet display ........ Press Ctrl + Shift + 6 to exit Frame 1: 106 bytes on wire (848 bits), 106 bytes captured (848 bits) on interface /tmp/epc_ws/wif_to_ts_pipe, id 0 Interface id: 0 (/tmp/epc_ws/wif_to_ts_pipe) Interface name: /tmp/epc_ws/wif_to_ts_pipe Encapsulation type: Ethernet (1) Arrival Time: Oct 11, 2023 17:22:20.730331000 UTC [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1697044940.730331000 seconds [Time delta from previous captured frame: 0.000000000 seconds] [Time delta from previous displayed frame: 0.000000000 seconds] [Time since reference or first frame: 0.000000000 seconds] Frame Number: 1 Frame Length: 106 bytes (848 bits) Capture Length: 106 bytes (848 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:cmd:ethertype:ip:icmp:data] Ethernet II, Src: 00:00:00:00:61:00 (00:00:00:00:61:00), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) <-- Dummy Ethernet header, EPC does not capture it properly Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast) Source: 00:00:00:00:61:00 (00:00:00:00:61:00) Address: 00:00:00:00:61:00 (00:00:00:00:61:00) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) Type: CiscoMetaData (0x8909) Cisco MetaData Version: 1 Length: 1 Options: 0x0001 SGT: 0 Type: IPv4 (0x0800) Internet Protocol Version 4, Src: 10.47.4.2, Dst: 10.47.10.2 <-- True IP addresses 0100 .... = Version: 4 .... 0101 = Header Length: 20 bytes (5) Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT) 0000 00.. = Differentiated Services Codepoint: Default (0) .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0) Total Length: 84 Identification: 0x35e4 (13796) Flags: 0x4000, Don't fragment 0... .... .... .... = Reserved bit: Not set .1.. .... .... .... = Don't fragment: Set ..0. .... .... .... = More fragments: Not set Fragment offset: 0 Time to live: 62 Protocol: ICMP (1) Header checksum: 0xe463 [validation disabled] [Header checksum status: Unverified] Source: 10.47.4.2 Destination: 10.47.10.2 Internet Control Message Protocol Type: 8 (Echo (ping) request) Code: 0 Checksum: 0x2693 [correct] [Checksum Status: Good] Identifier (BE): 72 (0x0048) Identifier (LE): 18432 (0x4800) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) 0000 69 9c 67 88 00 00 00 00 00 00 00 00 00 00 00 00 i.g............. 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0030 00 00 00 00 00 00 00 00 ........ Data: 699c67880000000000000000000000000000000000000000b^@& [Length: 56]
개정 이력
| 개정 | 게시 날짜 | 의견 |
|---|---|---|
1.0 |
12-Oct-2023 |
최초 릴리스 |
피드백