排除SD接入交换矩阵中的ARP解析故障
简介
本文档介绍如何对SD访问交换矩阵中的地址解析协议(ARP)进行故障排除。
先决条件
要求
Cisco 建议您了解以下主题：
- Internet协议(IP)转发
- 定位器/ID分离协议(LISP)
- 地址解析协议 (ARP)
使用的组件
本文档中的信息基于以下软件和硬件版本：
- Cisco IOS® XE 17.10.1上的C9000v
- SDA 1.0（非LISP PubSub）
本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。
本文档也可用于以下硬件和软件版本：
- C9200
- C9300
- C9400
- C9500
- C9600
- Cisco IOS® XE 16.12及更高版本
拓扑
在本练习中：
- 10.47.1.10和10.47.1.11是并置边界
- 10.47.1.12和10.47.1.13是交换矩阵边缘节点
- 10.47.4.2和10.47.4.3是SDA交换矩阵中的终端，位于同一VLAN/子网和同一VN(red_vn)中
本文档介绍了两个主要使用案例：
- 通过单播路径在10.47.4.2和10.47.4.3之间进行ARP解析
- 通过泛洪路径在10.47.4.2和10.47.4.3之间进行ARP解析
单播路径初始状态
在SDA中，交换矩阵内的ARP解析有两种主要方法。所谓的单播路径表明没有配置第2层(L2)ARP泛洪，或者没有在LISP第2层实例ID(IID)下配置与所讨论的VLAN对应的“泛洪arp nd”。除此警告外，为了符合单播ARP路径的条件，没有配置“IP本地代理ARP”或不存在仅第3层池。
如果满足这些警告，请继续此故障排除部分，并假设两个终端（10.47.4.2和10.47.4.3）都可以到达位于交换矩阵边缘交换机上作为10.47.4.1存在的各自默认网关
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 = 257/292/344 ms
Edge-2#ping vrf red_vn 10.47.4.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.47.4.3, timeout is 2 seconds: !!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 221/321/566 ms
接下来，验证每个交换矩阵边缘节点在IP设备跟踪(IPDT)、LISP L2数据库、L2地址解析(AR)数据库和L3数据库中都有各自的终端。
Edge-1:
要验证IPDT中的终端，请使用命令show device-tracking database interface <interface connecting to endpoint>
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 15s REACHABLE 228 s try 0(6374 s)
要验证LISP L2数据库中的终端，请使用命令show lisp eid-table vlan <vlan id> ethernet database <mac address>使用上一个命令中的VLAN和MAC地址
Edge-1#show lisp eid-table vlan 1026 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 Uptime: 3w5d, Last-change: 3w5d Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.12 10/10 cfg-intf site-self, reachable <-- Edge-1's RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1w3d Yes 0 10.47.1.11 3w5d Yes 0
要验证L2 AR数据库，请使用show lisp eid-table vlan <vlan-id> ethernet database address-resolution <mac address>命令
Edge-1#show lisp eid-table vlan 1026 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 IID, and IPv4 address, respectively
要验证LISP L3数据库，请使用命令show lisp instance-id <L3 IID> ipv4 database <IPv4 address>/subnet mask使用上一个命令中的LISP L3 IID
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 Uptime: 3w5d, Last-change: 3w5d Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.12 10/10 cfg-intf site-self, reachable <-- Edge-1's own RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1w0d Yes 0 10.47.1.11 1w0d Yes 0
Edge-2:
要验证IPDT中的终端，请使用命令show device-tracking database interface <interface connecting to local endpoint>
Edge-2#show device-tracking database interface g1/0/3
portDB has 3 entries for interface Gi1/0/3, 3 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 10.47.4.3 5254.001e.ad00 Gi1/0/3 1026 0024 122s REACHABLE 124 s try 0(5810 s)
要验证LISP L2数据库中的终端，请使用命令show lisp eid-table vlan <vlan id> ethernet database <mac address> 使用上一个命令中的VLAN和MAC地址
Edge-2#show lisp eid-table vlan 1026 ethernet database 5254.001e.ad00 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 5254.001e.ad00/48, dynamic-eid Auto-L2-group-8190, inherited from default locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 Uptime: 3w5d, Last-change: 3w5d Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.13 10/10 cfg-intf site-self, reachable <-- Edge-2's RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1w2d Yes 0 10.47.1.11 1w2d Yes 0
要验证L2 AR数据库，请使用命令show lisp eid-table vlan <vlan-id> ethernet database address-resolution <mac address>
Edge-2#show lisp eid-table vlan 1026 ethernet database address-resolution 5254.001e.ad00 LISP ETR Address Resolution for LISP 0 EID-table Vlan 1026 (IID 8190) (*) -> entry being deleted Hardware Address L3 InstID Host Address 5254.001e.ad00 4099 10.47.4.3/32 <-- Endpoint MAC address, LISP L3 IID, and IPv4 address, respectively
要验证LISP L3数据库，请使用命令show lisp instance-id <L3 IID> ipv4 database <IPv4 address>/subnet mask使用上一个命令中的LISP L3 IID
Edge-2#show lisp instance-id 4099 ipv4 database 10.47.4.3/32 LISP ETR IPv4 Mapping Database for LISP 0 EID-table vrf ed_vn (IID 4099), LSBs: 0x1 Entries total 1, no-route 0, inactive 0, do-not-register 2 10.47.4.3/32, dynamic-eid red-IPV4, inherited from default locator-set rloc_691b1fe4-5264-44c2-bb1b-0903b3eb2c51 Uptime: 1w0d, Last-change: 1w0d Domain-ID: local Service-Insertion: N/A Locator Pri/Wgt Source State 10.47.1.13 10/10 cfg-intf site-self, reachable <-- Edge-2, RLOC Map-server Uptime ACK Domain-ID 10.47.1.10 1w0d Yes 0 10.47.1.11 1w0d Yes 0
并置边界：
理想情况下，两个终端都从L2 LISP、L2 AR和L3角度注册到两个交换矩阵控制平面（Border-1和Border-2）。要派生L2 LISP IID，请检查交换矩阵边缘节点并使用命令show vlan id <vlan id>
Edge-1#show vlan id 1026 VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1026 red active L2LI0:8190, Gi1/0/3 <-- L2 LISP IID VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1026 enet 101026 1500 - - - - - 0 0 Remote SPAN VLAN ---------------- Disabled Primary Secondary Type Ports ------- --------- ----------------- ------------------------------------------
使用show lisp instance-id <L2 IID> ethernet server命令中的L2 IID，从L2 LISP角度验证服务器
Border-1#show lisp instance-id 8190 ethernet server
LISP Site Registration Information
* = Some locators are down or unreachable
# = Some registrations are sourced by reliable transport
Site Name Last Up Who Last Inst EID Prefix
Register Registered ID
site_uci never no -- 8190 any-mac
1w3d yes# 10.47.1.12:21038 8190 5254.0019.93e9/48 <-- RLOC of the FE node, EID prefix that was registered
1w2d yes# 10.47.1.13:16056 8190 5254.001e.ad00/48 <-- RLOC of the FE node, EID prefix that was registered
要验证L2 AR服务器，请使用命令show lisp instance-id <L2 IID> ethernet server address-resolution
Border-1#show lisp instance-id 8190 ethernet server address-resolution
Address-resolution data for router lisp 0 instance-id 8190
L3 InstID Host Address Hardware Address
4099 10.47.4.2/32 5254.0019.93e9 <-- L3 LISP IID, Endpoint IPv4 Address, MAC Address, respectively
4099 10.47.4.3/32 5254.001e.ad00 <-- L3 LISP IID, Endpoint IPv4 Address, MAC Address, respectively
要验证L3服务器，请使用命令show lisp instance-id <L3 IID> ipv4 server
Border-1#show lisp instance-id 4099 ipv4 server
LISP Site Registration Information
* = Some locators are down or unreachable
# = Some registrations are sourced by reliable transport
Site Name Last Up Who Last Inst EID Prefix
Register Registered ID
site_uci never no -- 4099 0.0.0.0/0
6d01h yes# 10.47.1.11:22876 4099 8.8.8.8/32
1w0d yes# 10.47.1.10:21610 4099 10.47.2.4/30
1w0d yes# 10.47.1.11:22876 4099 10.47.2.12/30
never no -- 4099 10.47.4.0/24
1w0d yes# 10.47.1.12:21038 4099 10.47.4.2/32
1w0d yes# 10.47.1.13:16056 4099 10.47.4.3/32
1w0d yes# 10.47.1.11:22876 4099 10.47.6.0/24
1w0d yes# 10.47.1.11:22876 4099 10.47.7.0/24
1w0d yes# 10.47.1.11:22876 4099 10.47.9.8/29
never no -- 4099 10.47.10.0/24
1w0d yes# 10.47.1.13:16056 4099 10.47.10.2/32
控制平面具有L3、L2和AR条目的注册事件的简要历史记录，在排除漫游客户端故障或可能出现的环路故障时（其中客户端在极短的时间内被多个交换矩阵边缘意外注册），这些信息非常有用。
Border-1#show lisp instance-id 8190 ethernet server resolution registration-history | include Timestamp|10.47.4.2|10.47.4.3
Timestamp (UTC) Instance Proto Roam WLC Source
*Oct 9 19:14:39.183 8190 TCP No No 10.47.1.12
+*10.47.4.2/32 / 5254.0019.93e9 <-- Last registered at Oct 9 19:14:39
*Oct 9 19:14:41.183 8190 TCP No No 10.47.1.13
+*10.47.4.3/32 / 5254.001e.ad00 <-- Last registered at OCt 9 19:14:31
单播路径ARP请求高级工作流
单播路径ARP请求验证
拥有IP地址10.47.4.2的终端发送广播ARP请求，通过Edge-1上的嵌入式数据包捕获(EPC)进行确认
Edge-1(10.47.1.12)
Edge-1#monitor capture 1 interface g1/0/3 in match any
Edge-1#monitor capture 1 start
Edge-1#monitor capture 1 stop
Capture statistics collected at software:
Capture duration - 39 seconds
Packets received - 21
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.
Edge-1#show monitor capture 1 buffer 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 19, 2023 23:43:31.893095000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1697759011.893095000 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)
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
此ARP请求将传送到CPU进行进一步处理。利用FED Punject捕获获取其他信息。
Edge-1#debug platform software fed switch active punt packet-capture set-filter “arp" Edge-1#debug platform software fed switch active punt packet-capture start Edge-1#debug platform software fed switch active punt packet-capture stop Edge-1#show platform software fed switch active punt packet-capture brief Punt packet capturing: disabled. Buffer wrapping: disabled Total captured so far: 8 packets. Capture capacity : 4096 packets Capture filter : "arp" ------ Punt Packet Number: 1, Timestamp: 2023/10/19 23:55:03.552 ------ interface : physical: GigabitEthernet1/0/3[if-id: 0x0000000b], pal: GigabitEthernet1/0/3 [if-id: 0x0000000b] <-- Physical interface the ARP Request was received from metadata : cause: 109 [snoop packets], sub-cause: 1, q-no: 16, linktype: MCP_LINK_TYPE_IP [1] <-- Punted for cause snoop packets to CPU queue 16 ether hdr : dest mac: ffff.ffff.ffff, src mac: 5254.0019.93e9 ether hdr : ethertype: 0x0806 (ARP)
要查看CPU队列16，请使用命令show platform software fed switch active punt cpuq 16
Edge-1#show platform software fed switch active punt cpuq 16 Punt CPU Q Statistics =========================================== CPU Q Id : 16 CPU Q Name : CPU_Q_PROTO_SNOOPING Packets received from ASIC : 49054 Send to IOSd total attempts : 49054 <-- Same number as received from ASIC
Send to IOSd failed count : 0 <-- No failures
理想情况下，在CPU监察器（队列16）的Proto Snooping Queue中没有丢弃，请使用命令show platform hardware fed switch active qos queue stats internal cpu policer
Edge-1#show platform hardware fed switch active qos queue stats internal cpu policer | include QId|Proto QId PlcIdx Queue Name Enabled Rate Rate Drop(Bytes) Drop(Frames) 16 12 Proto Snooping No 2000 2000 0 0 <-- No drops
接下来，传送的ARP请求由Punt服务处理。您可以通过debug、debug platform software infrastructure punt看到此行为
Edge-1#debug platform software infrastructure punt
*Oct 20 00:07:01.509: PUNT RX: mcprp_process_receive_packet: pak->vlan_id: 1026 *Oct 20 00:07:01.509: Punt: IP proto src 147.233.10.47, dst 4.2.0.0, from table 0, intf Gi1/0/3, encap ARPA, size 60, cause snoop packets(L3) <-- The IP address is obscured, but it is 10.47.4.2 *Oct 20 00:07:01.509: punt cause:snoop packets invoking reg_invoke_mcprp_punt_feature_msg *Oct 20 00:07:01.509: punt cause:snoop packets MCPRP_PUNT_PAK_PROC_OK_DONE
Punt Service处理数据包后，会将数据包传递到Proto Snoop和Proto ARP snoop进程。这会在ARP监听表中创建一个条目，并将数据包发送到Device-Tracking/SISF。要查看此信息，debug arp以及debug platform fhs all
Edge-1#debug arp
Edge-1#debug platform fhs all
*Oct 20 00:12:06.908: ARP packet received from ARP snooper(Gi1/0/3 10.47.4.2 (5254.0019.93e9) VLAN:1026)
使用命令show platform arpsnooping client <MAC address> 查看ARP请求会发生什么情况
Edge-1#show platform arpsnooping client 5254.0019.93e9 PLAT_DAI : Platform DAI shim FWDPLANE : Dataplane forwarding BRIDGE : Packet to be bridged ARPSN : Arp Snooping Packet Trace for client MAC 5254.0019.93E9: Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action ----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------ 2023/10/24 14:37:15.045 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 PSISF_PRE:PSP_BRNEUTRAL 2023/10/24 14:37:15.045 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 INJECT:INJ_VLAN_IFINPUT_TO_BDI 2023/10/24 14:37:15.045 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 INJECT:BD_DPIDX_TO_FWDPLANE
当IPDT/SISF处理数据包时，它会验证ARP请求的内容并创建一个临时条目，同时等待通过LISP进行解析。
Edge-1#show device-tracking messages detailed 255 | i 5254.0019.93e9 [Tue Oct 24 14:37:12.000] VLAN 1026, From Gi1/0/3 seclvl [guard], MAC 5254.0019.93e9: ARP::REQ, [Tue Oct 24 14:37:13.000] VLAN 1026, From Gi1/0/3 seclvl [guard], MAC 5254.0019.93e9: ARP::REQ,
如果使用debug device-tracking，您会看到设备跟踪中有指向000.0000.00fd的条目。所有这些意味着Gi1/0/3后面的主机正在查询尚未解析的主机，该主机处于临时状态（如果查询的是不存在的主机，则此状态不一定是坏事）
Edge-1#debug device-tracking Device-tracking - General debugging is on *Oct 24 14:55:02.967: SISF[POL]: vlan 1026 matches vlan list on policy IPDT_POLICY for target Gi1/0/3 *Oct 24 14:55:02.967: SISF[POL]: Found matching policy IPDT_POLICY for feature Device-tracking on Gi1/0/3
*Oct 24 14:55:02.967:SISF[GLN]: Checking if ARP ownership can be taken by device-tracking
*Oct 24 14:55:02.967:SISF[GLN]: Not an ARP reply, do not take over
*Oct 24 14:55:02.967:SISF[POL]: Found matching policy LISP-AR-RELAY-VLAN for feature Address Resolution Relay on vlan 1026 *Oct 24 14:55:02.967: SISF[MAC]: Creating new MAC entry for 0000.0000.00fd on interface if none exists *Oct 24 14:55:02.967: SISF[MAC]: Number of MAC entries in MAC-CREATING state incremented to 1 *Oct 24 14:55:02.968: SISF[BT ]: Attaching 0000.0000.00fd entry in MacAdrDB for 10.47.4.3 *Oct 24 14:55:02.968: SISF[GLN]: Binding entry event 1 for 10.47.4.3
由于LISP-AR-RELAY-VLAN策略，SISF使用LISP触发ARP解析，此LISP控制平面进程可以接管。
Edge-1#debug lisp control-plane all Edge-1#debug l2lisp all *Oct 24 15:10:27.677: LISP Client 'SISF client': SISF request to resolve 10.47.4.3 in Vlan 1026.
Edge-1通过LISP控制平面发送LISP映射请求以解析MAC地址10.47.4.3
Edge-1#debug lisp control-plane all Edge-1#debug l2lisp all *Oct 24 15:10:27.681: LISP[REMT ]-0: Map Request: Delay is over for IID 8190 EID 10.47.4.3/32, requester 'AR'. *Oct 24 15:10:27.681: LISP[REMT ]-0 IID 8190: Schedule processing of Map-Requests from 'remote EID prefix' in IPv4. *Oct 24 15:10:27.681: LISP[REMT ]-0: Map Request: Sending request for IID 8190 EID 10.47.4.3/32, requester 'AR'.
在Edge-1的CPU（控制平面）上完成的双向嵌入式数据包捕获(EPC)演示传入的ARP请求和后续的LISP映射请求
Edge-1#monitor capture 1 control-plane both match any Edge-1#monitor capture 1 start Started capture point : 1 Edge-1#monitor capture 1 stop Edge-1#show monitor capture 1 buffer display-filter "arp.dst.proto_ipv4==10.47.4.3 or lisp" Starting the packet display ........ Press Ctrl + Shift + 6 to exit 60 10.110293 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 61 10.111714 10.47.4.3 -> 10.47.4.3 LISP 114 Encapsulated Map-Request for Unknown LCAF Type (53)/32
您可以更详细地查看LISP映射请求
Edge-1#show monitor capture 1 buffer display-filter "frame.number==61" detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 61: 114 bytes on wire (912 bits), 114 bytes captured (912 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 24, 2023 15:20:08.948469000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698160808.948469000 seconds
[Time delta from previous captured frame: 0.001421000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 10.111714000 seconds]
Frame Number: 61
Frame Length: 114 bytes (912 bits)
Capture Length: 114 bytes (912 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:lisp:ip:udp:lisp]
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) <-- Ignore the SMAC/DMAC this is done up at the CPU, not final MAC addresses
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: 10.47.1.10 <-- Edge-1 RLOC and one of the collocated border RLOC, respectively
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 100
Identification: 0x599c (22940)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x4ab9 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.12
Destination: 10.47.1.10
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 80
Checksum: 0x6393 [unverified]
[Checksum Status: Unverified]
[Stream index: 0]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
1000 .... .... .... .... .... = Type: Encapsulated Control Message (8)
.... 0... .... .... .... .... .... .... = S bit (LISP-SEC capable): Not set
.... .0.. .... .... .... .... .... .... = D bit (DDT-originated): Not set
.... ..00 0000 0000 0000 0000 0000 0000 = Reserved bits: 0x0000000
Internet Protocol Version 4, Src: 10.47.4.3, Dst: 10.47.4.3 <-- MAP Request to resolve the MAC address tied to 10.47.4.3
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 68
Identification: 0x599b (22939)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x44ea [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.4.3
Destination: 10.47.4.3
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 48
Checksum: 0x9622 [unverified]
[Checksum Status: Unverified]
[Stream index: 1]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
0001 .... .... .... .... .... = Type: Map-Request (1)
.... 0000 00.. .... .... .... = Flags: 0x00
.... 0... .... .... .... .... = A bit (Authoritative): Not set
.... .0.. .... .... .... .... = M bit (Map-Reply present): Not set
.... ..0. .... .... .... .... = P bit (Probe): Not set
.... ...0 .... .... .... .... = S bit (Solicit-Map-Request): Not set
.... .... 0... .... .... .... = p bit (Proxy ITR): Not set
.... .... .0.. .... .... .... = s bit (SMR-invoked): Not set
.... .... ..00 0000 000. .... = Reserved bits: 0x000
.... .... .... .... ...0 0000 = ITR-RLOC Count: 0
Record Count: 1
Nonce: 0xcffee30fb39a05b7
Source EID AFI: Reserved (0)
Source EID: not set
ITR-RLOC 1: 10.47.1.12
ITR-RLOC AFI: IPv4 (1)
ITR-RLOC Address: 10.47.1.12
Map-Request Record 1: Unknown LCAF Type (53)/32
Reserved: 0x00
Prefix Length: 32
Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
Prefix: Unknown LCAF Type (53)
LCAF: Unknown (53)
LCAF Header: 00003520000a
Reserved bits: 0x00
Flags: 0x00
Type: Unknown (53)
Reserved bits: 0x20
Length: 10
[Expert Info (Error/Protocol): LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[Severity level: Error]
[Group: Protocol]
并置边界（10.47.1.10和10.47.1.11）
接下来，LISP控制平面使用LISP映射应答响应Edge-1。调试和CPU EPC中均可看到这种情况。
Border-2#show monitor capture 1 buffer display-filter lisp Starting the packet display ........ Press Ctrl + Shift + 6 to exit 113 12.767420 10.47.4.3 -> 10.47.4.3 LISP 114 Encapsulated Map-Request for Unknown LCAF Type (53)/32 114 12.774428 10.47.1.11 -> 10.47.1.12 LISP 96 Map-Reply for Unknown LCAF Type (53)/32
当我们更详细地了解数据包时，可以看到LISP映射请求和后续的LISP映射应答
Border-2#show monitor capture 1 buffer display-filter frame.number==113 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 113: 114 bytes on wire (912 bits), 114 bytes captured (912 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 24, 2023 15:41:06.566253000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698162066.566253000 seconds
[Time delta from previous captured frame: 0.013424000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 12.767420000 seconds]
Frame Number: 113
Frame Length: 114 bytes (912 bits)
Capture Length: 114 bytes (912 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:lisp:ip:udp:lisp]
Ethernet II, Src: 52:54:00:04:84:a3 (52:54:00:04:84:a3), Dst: 52:54:00:1c:7d:e0 (52:54:00:1c:7d:e0) <-- True MAC addresses
Destination: 52:54:00:1c:7d:e0 (52:54:00:1c:7d:e0)
Address: 52:54:00:1c:7d:e0 (52:54:00:1c:7d:e0)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: 52:54:00:04:84:a3 (52:54:00:04:84:a3)
Address: 52:54:00:04:84:a3 (52:54:00:04:84:a3)
.... ..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: 10.47.1.11 <-- Edge-1 RLOC and Border-2 RLOC, respectively
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 100
Identification: 0x5e19 (24089)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x463b [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.12
Destination: 10.47.1.11
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 80
Checksum: 0x6392 [unverified]
[Checksum Status: Unverified]
[Stream index: 1]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
1000 .... .... .... .... .... = Type: Encapsulated Control Message (8)
.... 0... .... .... .... .... .... .... = S bit (LISP-SEC capable): Not set
.... .0.. .... .... .... .... .... .... = D bit (DDT-originated): Not set
.... ..00 0000 0000 0000 0000 0000 0000 = Reserved bits: 0x0000000
Internet Protocol Version 4, Src: 10.47.4.3, Dst: 10.47.4.3 <-- LISP MAP Request for 10.47.4.3
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 68
Identification: 0x5e18 (24088)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x406d [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.4.3
Destination: 10.47.4.3
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 48
Checksum: 0xe9a8 [unverified]
[Checksum Status: Unverified]
[Stream index: 2]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
0001 .... .... .... .... .... = Type: Map-Request (1)
.... 0000 00.. .... .... .... = Flags: 0x00
.... 0... .... .... .... .... = A bit (Authoritative): Not set
.... .0.. .... .... .... .... = M bit (Map-Reply present): Not set
.... ..0. .... .... .... .... = P bit (Probe): Not set
.... ...0 .... .... .... .... = S bit (Solicit-Map-Request): Not set
.... .... 0... .... .... .... = p bit (Proxy ITR): Not set
.... .... .0.. .... .... .... = s bit (SMR-invoked): Not set
.... .... ..00 0000 000. .... = Reserved bits: 0x000
.... .... .... .... ...0 0000 = ITR-RLOC Count: 0
Record Count: 1
Nonce: 0x50c5f2b60b41ca1c
Source EID AFI: Reserved (0)
Source EID: not set
ITR-RLOC 1: 10.47.1.12
ITR-RLOC AFI: IPv4 (1)
ITR-RLOC Address: 10.47.1.12
Map-Request Record 1: Unknown LCAF Type (53)/32
Reserved: 0x00
Prefix Length: 32
Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
Prefix: Unknown LCAF Type (53)
LCAF: Unknown (53)
LCAF Header: 00003520000a
Reserved bits: 0x00
Flags: 0x00
Type: Unknown (53)
Reserved bits: 0x20
Length: 10
[Expert Info (Error/Protocol): LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[Severity level: Error]
[Group: Protocol]
我们还可以查看发送回的LISP映射应答
Border-2#show monitor capture 1 buffer display-filter frame.number==114 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 114: 96 bytes on wire (768 bits), 96 bytes captured (768 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 24, 2023 15:41:06.573261000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698162066.573261000 seconds
[Time delta from previous captured frame: 0.007008000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 12.774428000 seconds]
Frame Number: 114
Frame Length: 96 bytes (768 bits)
Capture Length: 96 bytes (768 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:lisp]
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) <-- CPU Inject does not properly show MAC addresses
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: 10.47.1.11, Dst: 10.47.1.12 <-- Border-2 RLOC and Edge-1 RLOC, respectively
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 82
Identification: 0xe231 (57905)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0xc234 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.11
Destination: 10.47.1.12
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 62
Checksum: 0xe1d6 [unverified]
[Checksum Status: Unverified]
[Stream index: 1]
[Timestamps]
[Time since first frame: 0.007008000 seconds]
[Time since previous frame: 0.007008000 seconds]
Locator/ID Separation Protocol
0010 .... .... .... .... .... = Type: Map-Reply (2)
.... 0... .... .... .... .... = P bit (Probe): Not set
.... .0.. .... .... .... .... = E bit (Echo-Nonce locator reachability algorithm enabled): Not set
.... ..0. .... .... .... .... = S bit (LISP-SEC capable): Not set
.... ...0 0000 0000 0000 0000 = Reserved bits: 0x00000
Record Count: 1
Nonce: 0x50c5f2b60b41ca1c
Mapping Record 1, EID Prefix: Unknown LCAF Type (53)/32, TTL: 1440, Action: No-Action, Not Authoritative
Record TTL: 1440
Locator Count: 1
EID Mask Length: 32
000. .... .... .... = Action: No-Action (0)
...0 .... .... .... = Authoritative bit: Not set
.... .000 0000 0000 = Reserved: 0x000
0000 .... .... .... = Reserved: 0x0
.... 0000 0000 0000 = Mapping Version: 0
EID Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
EID Prefix: Unknown LCAF Type (53)
LCAF: Unknown (53)
LCAF Header: 00003520000a
Reserved bits: 0x00
Flags: 0x00
Type: Unknown (53)
Reserved bits: 0x20
Length: 10
[Expert Info (Error/Protocol): LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[LCAF type 53 is not defined in draft-ietf-lisp-lcaf-05]
[Severity level: Error]
[Group: Protocol]
Locator Record 1, RLOC: 52:54:00:1e:ad:00, Unreachable, Priority/Weight: 1/100, Multicast Priority/Weight: 1/100
Priority: 1
Weight: 100
Multicast Priority: 1
Multicast Weight: 100
Flags: 0x0000
0000 0000 0000 0... = Reserved: 0x0000
.... .... .... .0.. = Local: Not set
.... .... .... ..0. = Probe: Not set
.... .... .... ...0 = Reachable: Not set
AFI: 802 (includes all 802 media plus Ethernet) (6)
Locator: 52:54:00:1e:ad:00
Border-2#debug lisp control-plane all All LISP control debugging is on at verbose level Border-2#debug l2lisp all All L2Lisp debugging is on *Oct 24 16:02:17.854: LISP[TRNSP]-0: Processing received Encap-Control(8) message on GigabitEthernet1/0/3 from 10.47.1.12:4342 to 10.47.1.11:4342. *Oct 24 16:02:17.854: 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. *Oct 24 16:02:17.855: LISP[MR ]-0: Received Map-Request with 1 records, first EID IID 8190 10.47.4.3/32, source EID UNSPEC, nonce 0x3847C91F-0xA966DDEA. *Oct 24 16:02:17.855: LISP[MR ]-0 IID 8190 Eth-ARP: MS EID 10.47.4.3/32: Sending proxy reply to 10.47.1.12.
现在Edge-1已收到地址解析(AR)请求的LISP映射应答，指出10.47.4.3是5254.001e.ad00,Edge-1将生成另一个LISP映射请求以确定终端MAC地址的RLOC
Edge-1#debug lisp control-plane all
Edge-1#debug l2lisp all
*Oct 24 16:19:54.843: LISP[REMT ]-0: Received Map-Reply with nonce 0x37F890B9-0xAC60D2B9, 1 records.
*Oct 24 16:19:54.843: LISP[MS ]-0: This is a Address Resolution message.
*Oct 24 16:19:54.843: LISP[REMT ]-0: Map-Reply nonce matches pending request for IID 8190 EID 10.47.4.3/32, requester 'AR'.
*Oct 24 16:19:54.843: LISP[REMT ]-0: Processing Map-Reply mapping record for IID 8190 Eth-ARP 10.47.4.3/32 LCAF 53, ttl 1440, action none, not authoritative, 1 locator.
*Oct 24 16:19:54.843: LISP[REMT ]-0: 5254.001e.ad00 pri/wei/dID/mID/met/si_type/si_id/si_flg/afn_id=1/100/0/0/4294967295/none/0/UNSPEC/UNSPEC lpr.
*Oct 24 17:11:24.056: LISP[REMT ]-0 IID 8190: Schedule processing of Map-Requests from 'remote EID prefix' in IPv4. *Oct 24 17:11:24.056: LISP[REMT ]-0:
Map Request: Sending request for IID 8190 EID 5254.001e.ad00/48, requester 'remote EID prefix'.>
LISP控制平面接收用于MAC地址10.47.4.3的LISP映射请求，查询以太网服务器表以查找L2 LISP ID 8190，并发送具有MAC-RLOC绑定的LISP映射应答
Border-1#show monitor capture 1 buff display-filter lisp brief Starting the packet display ........ Press Ctrl + Shift + 6 to exit
250 28.656076 0.0.0.0 -> 0.0.0.0 LISP 176 Encapsulated Map-Request for [8190] 52:54:00:1e:ad:00/48 251 28.658851 10.47.1.10 -> 10.47.1.12 LISP 96 Map-Reply for [8190] 52:54:00:1e:ad:00/48
我们可以仔细查看LISP映射请求和映射应答
Border-1#show monitor capture 1 buffer display-filter frame.number==250 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 250: 176 bytes on wire (1408 bits), 176 bytes captured (1408 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 24, 2023 17:37:11.647755000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698169031.647755000 seconds
[Time delta from previous captured frame: 0.315724000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 28.656076000 seconds]
Frame Number: 250
Frame Length: 176 bytes (1408 bits)
Capture Length: 176 bytes (1408 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:lisp:ip:udp:lisp]
Ethernet II, Src: 52:54:00:04:84:b1 (52:54:00:04:84:b1), Dst: 52:54:00:0a:42:f3 (52:54:00:0a:42:f3)
Destination: 52:54:00:0a:42:f3 (52:54:00:0a:42:f3)
Address: 52:54:00:0a:42:f3 (52:54:00:0a:42:f3)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: 52:54:00:04:84:b1 (52:54:00:04:84:b1)
Address: 52:54:00:04:84:b1 (52:54:00:04:84:b1)
.... ..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: 10.47.1.10 <-- Edge-1 RLOC and Border-1 RLOC, respectively
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 162
Identification: 0x75e5 (30181)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x2e32 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.12
Destination: 10.47.1.10
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 142
Checksum: 0x46f1 [unverified]
[Checksum Status: Unverified]
[Stream index: 4]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
1000 .... .... .... .... .... = Type: Encapsulated Control Message (8)
.... 0... .... .... .... .... .... .... = S bit (LISP-SEC capable): Not set
.... .0.. .... .... .... .... .... .... = D bit (DDT-originated): Not set
.... ..00 0000 0000 0000 0000 0000 0000 = Reserved bits: 0x0000000
Internet Protocol Version 4, Src: 0.0.0.0, Dst: 0.0.0.0
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 130
Identification: 0x75e4 (30180)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x44c7 [validation disabled]
[Header checksum status: Unverified]
Source: 0.0.0.0
Destination: 0.0.0.0
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 110
Checksum: 0x18bb [unverified]
[Checksum Status: Unverified]
[Stream index: 5]
[Timestamps]
[Time since first frame: 0.000000000 seconds]
[Time since previous frame: 0.000000000 seconds]
Locator/ID Separation Protocol
0001 .... .... .... .... .... = Type: Map-Request (1)
.... 0100 00.. .... .... .... = Flags: 0x10
.... 0... .... .... .... .... = A bit (Authoritative): Not set
.... .1.. .... .... .... .... = M bit (Map-Reply present): Set
.... ..0. .... .... .... .... = P bit (Probe): Not set
.... ...0 .... .... .... .... = S bit (Solicit-Map-Request): Not set
.... .... 0... .... .... .... = p bit (Proxy ITR): Not set
.... .... .0.. .... .... .... = s bit (SMR-invoked): Not set
.... .... ..00 0000 000. .... = Reserved bits: 0x000
.... .... .... .... ...0 0000 = ITR-RLOC Count: 0
Record Count: 1
Nonce: 0x86438e956066d3ca
Source EID AFI: LISP Canonical Address Format (LCAF) (16387)
Source EID: [8190] 00:00:0c:9f:f3:41
LCAF: Instance ID: 8190, Address: 00:00:0c:9f:f3:41
LCAF Header: 00000220000c
Reserved bits: 0x00
Flags: 0x00
Type: Instance ID (2)
Reserved bits: 0x20
Length: 12
Instance ID: 8190
Address AFI: 802 (includes all 802 media plus Ethernet) (6)
Address: 00:00:0c:9f:f3:41 (00:00:0c:9f:f3:41)
ITR-RLOC 1: 10.47.1.12
ITR-RLOC AFI: IPv4 (1)
ITR-RLOC Address: 10.47.1.12
Map-Request Record 1: [8190] 52:54:00:1e:ad:00/48 <-- Map-Request for this specific MAC address
Reserved: 0x00
Prefix Length: 48
Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
Prefix: [8190] 52:54:00:1e:ad:00
LCAF: Instance ID: 8190, Address: 52:54:00:1e:ad:00
LCAF Header: 00000220000c
Reserved bits: 0x00
Flags: 0x00
Type: Instance ID (2)
Reserved bits: 0x20
Length: 12
Instance ID: 8190
Address AFI: 802 (includes all 802 media plus Ethernet) (6)
Address: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
Map-Reply Record
Mapping Record 1, EID Prefix: [8190] 00:00:0c:9f:f3:41/48, TTL: 1440, Action: No-Action, Authoritative
Record TTL: 1440
Locator Count: 1
EID Mask Length: 48
000. .... .... .... = Action: No-Action (0)
...1 .... .... .... = Authoritative bit: Set
.... .000 0000 0000 = Reserved: 0x000
0000 .... .... .... = Reserved: 0x0
.... 0000 0000 0000 = Mapping Version: 0
EID Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
EID Prefix: [8190] 00:00:0c:9f:f3:41
LCAF: Instance ID: 8190, Address: 00:00:0c:9f:f3:41
LCAF Header: 00000220000c
Reserved bits: 0x00
Flags: 0x00
Type: Instance ID (2)
Reserved bits: 0x20
Length: 12
Instance ID: 8190
Address AFI: 802 (includes all 802 media plus Ethernet) (6)
Address: 00:00:0c:9f:f3:41 (00:00:0c:9f:f3:41)
Locator Record 1, Local RLOC: 10.47.1.12, Reachable, Priority/Weight: 10/10, Multicast Priority/Weight: 10/10
Priority: 10
Weight: 10
Multicast Priority: 10
Multicast Weight: 10
Flags: 0x0005
0000 0000 0000 0... = Reserved: 0x0000
.... .... .... .1.. = Local: Set
.... .... .... ..0. = Probe: Not set
.... .... .... ...1 = Reachable: Set
AFI: IPv4 (1)
Locator: 10.47.1.12
Border-1#show monitor capture 1 buffer display-filter frame.number==251 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 251: 96 bytes on wire (768 bits), 96 bytes captured (768 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 24, 2023 17:37:11.650530000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698169031.650530000 seconds
[Time delta from previous captured frame: 0.002775000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 28.658851000 seconds]
Frame Number: 251
Frame Length: 96 bytes (768 bits)
Capture Length: 96 bytes (768 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:lisp]
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)
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: 10.47.1.10, Dst: 10.47.1.12 <-- Border-1 RLOC, Edge-1 RLOC, respectively
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 82
Identification: 0x12a9 (4777)
Flags: 0x0000
0... .... .... .... = Reserved bit: Not set
.0.. .... .... .... = Don't fragment: Not set
..0. .... .... .... = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (17)
Header checksum: 0x91be [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.10
Destination: 10.47.1.12
User Datagram Protocol, Src Port: 4342, Dst Port: 4342
Source Port: 4342
Destination Port: 4342
Length: 62
Checksum: 0xd63e [unverified]
[Checksum Status: Unverified]
[Stream index: 4]
[Timestamps]
[Time since first frame: 0.002775000 seconds]
[Time since previous frame: 0.002775000 seconds]
Locator/ID Separation Protocol
0010 .... .... .... .... .... = Type: Map-Reply (2)
.... 0... .... .... .... .... = P bit (Probe): Not set
.... .0.. .... .... .... .... = E bit (Echo-Nonce locator reachability algorithm enabled): Not set
.... ..0. .... .... .... .... = S bit (LISP-SEC capable): Not set
.... ...0 0000 0000 0000 0000 = Reserved bits: 0x00000
Record Count: 1
Nonce: 0x86438e956066d3ca
Mapping Record 1, EID Prefix: [8190] 52:54:00:1e:ad:00/48, TTL: 1440, Action: No-Action, Not Authoritative
Record TTL: 1440
Locator Count: 1
EID Mask Length: 48
000. .... .... .... = Action: No-Action (0)
...0 .... .... .... = Authoritative bit: Not set
.... .000 0000 0000 = Reserved: 0x000
0000 .... .... .... = Reserved: 0x0
.... 0000 0000 0000 = Mapping Version: 0
EID Prefix AFI: LISP Canonical Address Format (LCAF) (16387)
EID Prefix: [8190] 52:54:00:1e:ad:00
LCAF: Instance ID: 8190, Address: 52:54:00:1e:ad:00
LCAF Header: 00000220000c
Reserved bits: 0x00
Flags: 0x00
Type: Instance ID (2)
Reserved bits: 0x20
Length: 12
Instance ID: 8190
Address AFI: 802 (includes all 802 media plus Ethernet) (6)
Address: 52:54:00:1e:ad:00 (52:54:00:1e:ad:00)
Locator Record 1, RLOC: 10.47.1.13, Reachable, Priority/Weight: 10/10, Multicast Priority/Weight: 10/10
Priority: 10
Weight: 10
Multicast Priority: 10
Multicast Weight: 10
Flags: 0x0001
0000 0000 0000 0... = Reserved: 0x0000
.... .... .... .0.. = Local: Not set
.... .... .... ..0. = Probe: Not set
.... .... .... ...1 = Reachable: Set
AFI: IPv4 (1)
Locator: 10.47.1.13 <-- This RLOC owns the MAC address
Border-1#debug lisp control-plane all
Border-1#debug l2lisp all
*Oct 24 18:03:00.361: LISP[TRNSP]-0: Processing received Map-Request(1) message on GigabitEthernet1/0/3 from 0.0.0.0:4342 to 0.0.0.0:4342. *Oct 24 18:03:00.361: LISP[MR ]-0: Received Map-Request with 1 records, first EID IID 8190 5254.001e.ad00/48, source EID 0000.0c9f.f341, nonce 0xAD90C521-0x348A478D. *Oct 24 18:03:00.361: LISP[MR ]-0 IID 8190 MAC: MS EID 5254.001e.ad00/48: Sending proxy reply to 10.47.1.12.
Edge-1从Border-1接收LISP映射应答
Edge-1#debug lisp control-plane all
Edge-1#debug l2lisp all
*Oct 24 17:11:24.558: LISP[TRNSP]-0: Processing received Map-Reply(2) message on GigabitEthernet1/0/1 from 10.47.1.10:4342 to 10.47.1.12:4342. *Oct 24 17:11:24.558: LISP[REMT ]-0: Received Map-Reply with nonce 0x38A78BA8-0xC378149D, 1 records. *Oct 24 17:11:24.558: LISP[REMT ]-0: Map-Reply nonce matches pending request for IID 8190 EID 5254.001e.ad00/48, requester 'remote EID prefix'. *Oct 24 17:11:24.558: 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. *Oct 24 17:11:24.559: LISP[REMT ]-0: 10.47.1.13 pri/wei/dID/mID/met/si_type/si_id/si_flg/afn_id=10/10/0/0/4294967295/none/0/UNSPEC/UNSPEC lpR.
可通过CPU EPC在Edge-1上查看通过LISP/SISF交换的整个ARP请求
Edge-1#show monitor capture 1 buffer display-filter "arp.dst.proto_ipv4==10.47.4.3 or lisp" Starting the packet display ........ Press Ctrl + Shift + 6 to exit
120 18.415474 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 <-- Broadcast ARP Request punted up to the CPU 121 18.416092 10.47.4.3 -> 10.47.4.3 LISP 114 Encapsulated Map-Request for Unknown LCAF Type (53)/32 <-- LISP Map-Request to obtain the MAC address of 10.47.4.3 135 19.598041 10.47.1.11 -> 10.47.1.12 LISP 96 Map-Reply for Unknown LCAF Type (53)/32 <-- LISP Map-Reply providing the MAC address of 10.47.4.3 136 19.613072 0.0.0.0 -> 0.0.0.0 LISP 176 Encapsulated Map-Request for [8190] 52:54:00:1e:ad:00/48 <-- LISP Map-Request to obtain the RLOC for MAC address 5254.001e.ad00 138 20.119722 10.47.1.10 -> 10.47.1.12 LISP 96 Map-Reply for [8190] 52:54:00:1e:ad:00/48 <-- LISP Map-Reply for the RLOC that owns MAC address 5254.001e.ad00 143 20.477618 52:54:00:19:93:e9 -> 52:54:00:1e:ad:00 ARP 60 Who has 10.47.4.3? Tell 10.47.4.2 <-- Unicast ARP Request injected down from the CPU
一旦边缘1上的控制平面收敛，就会出现映射缓存条目以及SISF远程条目(RMT)
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: 00:06:26, expires: 23:53:34, via map-reply, complete
Sources: map-reply
State: complete, last modified: 00:06:26, map-source: 10.47.1.13
Active, Packets out: 11(0 bytes), counters are not accurate (~ 00:00:00 ago)
Encapsulating dynamic-EID traffic
Locator Uptime State Pri/Wgt Encap-IID
10.47.1.13 00:06:26 up 10/10 -
Last up-down state change: 00:06:26, state change count: 1
Last route reachability change: 2w0d, state change count: 1
Last priority / weight change: never/never
RLOC-probing loc-status algorithm:
Last RLOC-probe sent: 00:06:25 (rtt 1104ms)
Edge-1#show device-tracking database address 10.47.4.3
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
RMT 10.47.4.3 5254.001e.ad00 L2LI0 1026 0005 7mn STALE try 0 731 s
接下来，从CPU向下注入单播ARP请求。请记住，物理接口上的EPC不能在出口方向捕获CPU注入的数据包，可以使用交换机端口端口分析器(SPAN)或接收交换矩阵边缘节点上的入口EPC来确认收到VXLAN封装的单播ARP请求
Edge-2(10.47.1.13)
首先，检验LISP或隧道接口是否列在VLAN 1026的VLAN ID输出中
Edge-2#show vlan id 1026 VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1026 red active L2LI0:8190, Gi1/0/3 <-- L2 LISP IID is associated VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1026 enet 101026 1500 - - - - - 0 0 Remote SPAN VLAN ---------------- Disabled Primary Secondary Type Ports ------- --------- ----------------- ------------------------------------------
现在，Edge-2上的入口EPC显示收到的VXLAN封装ARP应答。由于单播ARP请求是VXLAN封装的，您可以利用IP ACL来匹配向Edge-2 RLOC发送的Edge-1 RLOC（分别为10.47.1.12和10.47.1.13）以帮助过滤流量。
Edge-2(config)#ip access-list extended tac Edge-2(config-ext-nacl)#permit ip host 10.47.1.12 host 10.47.1.13
Edge-2#monitor capture 1 interface g1/0/1 in access-list tac Edge-2#monitor capture 1 interface g1/0/2 in access-list tac Edge-2#monitor capture 1 start Started capture point : 1 Edge-2#monitor capture 1 stop Capture statistics collected at software: Capture duration - 20 seconds Packets received - 10 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 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
仔细检查此ARP请求后，您可以看到VXLAN封装、UDP报头和其他报头，因为ARP帧很小，通常为60字节。
Edge-2#show monitor capture 1 buffer display-filter frame.number==1 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 1: 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 24, 2023 18:57:34.642468000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698173854.642468000 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: 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 <-- Edge-1 RLOC and Edge-2 RLOC, respectively
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: 0x798a (31114)
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: 0xed8b [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: 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): 8190 <-- LISP L2 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) <-- True source and destination endpoint MAC address
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
Edge-2弹出VXLAN封装并将单播ARP请求传送到CPU进行进一步处理。这可以通过FED Punject捕获看到。
Edge-2#debug platform software fed switch active punt packet-capture start Punt packet capturing started. Edge-2#debug platform software fed switch active punt packet-capture stop Punt packet capturing stopped. Captured 21 packet(s) Edge-2#show platform software fed sw active punt packet-capture display-filter "arp" brief Punt packet capturing: disabled. Buffer wrapping: disabled Total captured so far: 21 packets. Capture capacity : 4096 packets ------ Punt Packet Number: 6, Timestamp: 2023/10/24 19:14:32.930 ------ interface : physical: [if-id: 0x00000000], pal: L2LISP0 [if-id: 0x00000017] metadata : cause: 109 [snoop packets], sub-cause: 1, q-no: 16, linktype: MCP_LINK_TYPE_IP [1] ether hdr : dest mac: 5254.001e.ad00, src mac: 5254.0019.93e9 ether hdr : ethertype: 0x0806 (ARP)
ARP请求将发送到ARP监听进程。
Edge-2#debug platform software infrastructure punt
*Oct 24 19:18:38.916: PUNT RX: mcprp_process_receive_packet: pak->vlan_id: 1026 *Oct 24 19:18:38.916: Punt: IP proto src 147.233.10.47, dst 4.2.0.0, from table 0, intf L2LI0, encap LISP, size 60, cause snoop packets(L3) <-- You can see the 10.47.4.2 *Oct 24 19:18:38.916: punt cause:snoop packets invoking reg_invoke_mcprp_punt_feature_msg *Oct 24 19:18:38.916: punt cause:snoop packets MCPRP_PUNT_PAK_PROC_OK_DONE
由于此ARP请求来自L2 LISP/隧道接口，因此Edge-2从未学习10.47.4.2作为LISP中动态EID的本地端点
Edge-2#show platform arpsnooping client 5254.0019.93e9 PLAT_DAI : Platform DAI shim FWDPLANE : Dataplane forwarding BRIDGE : Packet to be bridged ARPSN : Arp Snooping Packet Trace for client MAC 5254.0019.93E9: Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action ----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------ 2023/10/24 15:57:01.129 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 PLATF_DAI:RECEIVED INPUT 2023/10/24 15:57:01.129 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 PLATF_DAI:RECEIVED_TUNNEL 2023/10/24 15:57:01.129 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 PLATF_DAI:SHUNTED
现在，ARP请求从CPU向下注入到VLAN 1026，具体而言就是Gi1/0/3,10.47.4.3连接到此VLAN。
Edge-2#show mac address-table address 5254.001e.ad00
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
1026 5254.001e.ad00 DYNAMIC Gi1/0/3
Total Mac Addresses for this criterion: 1
Edge-2#show platform arpsnooping client 5254.001e.ad00
PLAT_DAI : Platform DAI shim
FWDPLANE : Dataplane forwarding
BRIDGE : Packet to be bridged
ARPSN : Arp Snooping
Packet Trace for client MAC 5254.001E.AD00:
Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action
----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------
2023/10/24 15:57:01.129 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 INJECT:INJ_VLAN_IFINPUT_TO_BDI
2023/10/24 15:57:01.129 5254.0019.93e9 10.47.4.2 0000.0000.0000 10.47.4.3 ARP_REQUEST 1026 INJECT:BD_DPIDX_TO_FWDPLANE
单播路径ARP回复高级工作流
单播路径ARP应答验证
Edge-2(10.47.1.13)
拥有10.47.4.3的终端以单播ARP应答响应，由于IPDT的存在，ARP应答将传送到CPU。初始验证通过面向终端的接口上的EPC进行。
Edge-2#show monitor capture 1 buffer display-filter arp
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
2 88.712035 52:54:00:1e:ad:00 -> 00:00:0c:9f:f3:41 ARP 60 10.47.4.3 is at 52:54:00:1e:ad:00
接下来，使用FED Punject验证点操作
Edge-2#debug platform software fed sw active punt packet-capture start Punt packet capturing started. Edge-2#debug platform software fed sw active punt packet-capture stop Punt packet capturing stopped. Captured 22 packet(s) Edge-2#show platform software fed sw active punt packet-capture display-filter "arp" brief Punt packet capturing: disabled. Buffer wrapping: disabled Total captured so far: 22 packets. Capture capacity : 4096 packets ------ Punt Packet Number: 6, Timestamp: 2023/10/24 20:32:35.634 ------ interface : physical: [if-id: 0x00000000], pal: L2LISP0 [if-id: 0x00000017] metadata : cause: 109 [snoop packets], sub-cause: 1, q-no: 16, linktype: MCP_LINK_TYPE_IP [1] <-- Punted for Snoop Packets to CPU queue 16 ether hdr : dest mac: 5254.001e.ad00, src mac: 5254.0019.93e9 ether hdr : ethertype: 0x0806 (ARP)
接下来，ARP应答将传递到ARP监听器和设备跟踪
Edge-2#debug platform software infrastructure punt
*Oct 24 19:18:39.101: PUNT RX: mcprp_process_receive_packet: pak->vlan_id: 1026 *Oct 24 19:18:39.101: Punt: IP proto src 173.0.10.47, dst 4.3.82.84, from table 0, intf Gi1/0/3, encap ARPA, size 60, cause snoop packets(L3) <-- 10.47.4.3 is obscured *Oct 24 19:18:39.101: punt cause:snoop packets invoking reg_invoke_mcprp_punt_feature_msg *Oct 24 19:18:39.101: punt cause:snoop packets MCPRP_PUNT_PAK_PROC_OK_DONE
Edge-2#debug platform fhs Edge-2#debug platform fhs all ARP packet received from ARP snooper(Gi1/0/3 10.47.4.3 (5254.001e.ad00) VLAN:10
Edge-2#debug device-tracking
*Oct 24 20:42:22.554: SISF[CLA]: Interest on target vlan 1026 *Oct 24 20:42:22.554: SISF[CLA]: feature Device-tracking *Oct 24 20:42:22.554: SISF[CLA]: feature Address Resolution Relay
*Oct 24 20:42:22.555: SISF[SWI]: Gi1/0/3 vlan 1026 Feature_0 Device-tracking priority 128 *Oct 24 20:42:22.555: SISF[SWI]: Gi1/0/3 vlan 1026 Feature_1 Address Resolution Relay priority 81 *Oct 24 20:42:22.555: SISF[PRS]: ARP-REPLY target set to 10.47.4.2 *Oct 24 20:42:22.556: SISF[SWI]: Gi1/0/3 vlan 1026 Feature Device-tracking rc: OK *Oct 24 20:42:22.556: SISF[ARR]: Gi1/0/3 vlan 1026 Receive a msg in AR *Oct 24 20:42:22.557: SISF[ARR]: Gi1/0/3 vlan 1026 Not ARP Request or NS, return OK *Oct 24 20:42:22.557: SISF[SWI]: Gi1/0/3 vlan 1026 Feature Address Resolution Relay rc: OK *Oct 24 20:42:22.557: SISF[SWI]: Gi1/0/3 vlan 1026 Features execution OK
由于ARP应答已经指向实际目的MAC地址（与Edge-1上临时看到的占位符不同），Edge-2可以触发LISP映射请求以解析RLOC-MAC关联。
Edge-2#debug lisp control-plane all
Edge-2#debug l2lisp all
*Oct 24 20:47:34.400: LISP[REMT ]-0 IID 8190: Schedule processing of Map-Requests from 'remote EID prefix' in IPv4. *Oct 24 20:47:34.401: LISP[REMT ]-0: Map Request: Sending request for IID 8190 EID 5254.0019.93e9/48, requester 'remote EID prefix'. *Oct 24 20:47:35.166: LISP[TRNSP]-0: Processing received Map-Reply(2) message on GigabitEthernet1/0/1 from 10.47.1.11:4342 to 10.47.1.13:4342. *Oct 24 20:47:35.166: LISP[REMT ]-0: Received Map-Reply with nonce 0x5879579E-0xCAFC0AA5, 1 records. *Oct 24 20:47:35.166: LISP[REMT ]-0: Processing Map-Reply mapping record for IID 8190 MAC 5254.0019.93e9/48 LCAF 2, ttl 1440, action none, not authoritative, 1 locator. *Oct 24 20:47:35.166: LISP[REMT ]-0: 10.47.1.12 pri/wei/dID/mID/met/si_type/si_id/si_flg/afn_id=10/10/0/0/4294967295/none/0/UNSPEC/UNSPEC lpR.
使用命令show lisp instance-id <L2 IID> ethernet map-cache <destination MAC address> 验证此ARP应答将通过VXLAN封装发送到哪个RLOC
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: 00:03:45, expires: 23:56:15, via map-reply, complete
Sources: map-reply
State: complete, last modified: 00:03:45, map-source: 10.47.1.12
Active, Packets out: 6(0 bytes), counters are not accurate (~ 00:00:59 ago)
Encapsulating dynamic-EID traffic
Locator Uptime State Pri/Wgt Encap-IID
10.47.1.12 00:03:45 up 10/10 -
Last up-down state change: 00:03:45, state change count: 1
Last route reachability change: 2w0d, state change count: 1
Last priority / weight change: never/never
RLOC-probing loc-status algorithm:
Last RLOC-probe sent: 00:03:45 (rtt 861ms)
在LISP解析之后，可以将ARP应答从CPU注入到底层的10.47.1.12 RLOC
Edge-2#show ip cef 10.47.1.12 10.47.1.12/32 nexthop 10.47.1.2 GigabitEthernet1/0/2 nexthop 10.47.1.6 GigabitEthernet1/0/1
可通过EPC在Edge-2 CPU上查看整个流，ARP应答和ARP请求之间的区别在于此流中没有LISP AR解析。
Edge-2#show monitor capture 1 buffer display-filter "arp.src.proto_ipv4==10.47.4.3 or lisp" Starting the packet display ........ Press Ctrl + Shift + 6 to exit 62 9.355185 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 <-- ARP Reply punted up to the CPU 63 9.355486 0.0.0.0 -> 0.0.0.0 LISP 176 Encapsulated Map-Request for [8190] 52:54:00:19:93:e9/48 <-- LISP Map-Request to resolve RLOC-MAC association 88 12.058412 10.47.1.10 -> 10.47.1.13 LISP 96 Map-Reply for [8190] 52:54:00:19:93:e9/48 <-- LISP Map-Reply providing the RLOC-MAC association 90 12.072455 52:54:00:1e:ad:00 -> 52:54:00:19:93:e9 ARP 110 10.47.4.3 is at 52:54:00:1e:ad:00 <-- VXLAN Encapsulated ARP Reply that is injected by the CPU
您可以使用show platform arpsnooping client <source MAC address> 命令查看在Edge-2上采取的与ARP应答相关的操作
Edge-2#show platform arpsnooping client 5254.001e.ad00 PLAT_DAI : Platform DAI shim FWDPLANE : Dataplane forwarding BRIDGE : Packet to be bridged ARPSN : Arp Snooping Packet Trace for client MAC 5254.001E.AD00: Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action ----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------
2023/10/24 20:47:38.151 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:RECEIVED INPUT 2023/10/24 20:47:38.151 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:RECEIVED 2023/10/24 20:47:38.152 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:TO_ARPSND 2023/10/24 20:47:38.152 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PSISF_PRE:PSP_INJNEUTRAL 2023/10/24 20:47:38.152 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 INJECT:INJ_VLAN_IFINPUT_TO_BDI 2023/10/24 20:47:38.152 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 INJECT:BD_DPIDX_TO_FWDPLANE
Edge-1(10.47.1.12)
Edge-1接收VXLAN封装的ARP应答，弹出VXLAN报头并将ARP应答传送到CPU进行进一步处理。
Edge-1#debug platform software infrastructure punt
*Oct 24 21:42:11.303: PUNT RX: mcprp_process_receive_packet: pak->vlan_id: 1026 *Oct 24 21:42:11.303: Punt: IP proto src 173.0.10.47, dst 4.3.82.84, from table 0, intf L2LI0, encap LISP, size 60, cause snoop packets(L3) <-- Can see 10.47.4.3 IP address that has been obscured *Oct 24 21:42:11.303: punt cause:snoop packets invoking reg_invoke_mcprp_punt_feature_msg *Oct 24 21:42:11.303: punt cause:snoop packets MCPRP_PUNT_PAK_PROC_OK_DONE
您可以使用show platform arpsnooping client <source MAC address> 命令获取有关在Edge-1上如何处理ARP应答的其他信息
Edge-1#show platform arpsnooping client 5254.001e.ad00 PLAT_DAI : Platform DAI shim FWDPLANE : Dataplane forwarding BRIDGE : Packet to be bridged ARPSN : Arp Snooping Packet Trace for client MAC 5254.001E.AD00: Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action ----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------
2023/10/24 20:40:33.741 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:RECEIVED INPUT 2023/10/24 20:40:33.741 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:RECEIVED_TUNNEL 2023/10/24 20:40:33.741 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 PLATF_DAI:SHUNTED 2023/10/24 20:40:33.741 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 INJECT:INJ_VLAN_IFINPUT_TO_BDI 2023/10/24 20:40:33.741 5254.001e.ad00 10.47.4.3 5254.0019.93e9 10.47.4.2 ARP_REPLY 1026 INJECT:BD_DPIDX_TO_FWDPLANE
Edge-1采用转发的ARP应答，并将ARP应答发送到VLAN 1026，发送到终端10.47.4.2所在的端口
Edge-1#show mac address-table address 5254.0019.93e9
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
1026 5254.0019.93e9 DYNAMIC Gi1/0/3
Total Mac Addresses for this criterion: 1
ARP泛洪（L2泛洪）路径
使用L2泛洪时，ARP解析也可能发生在交换矩阵中的所有交换矩阵边缘节点以及支持L2切换/IP定向广播的边界加入通用底层组播组的情况下。每当符合泛洪条件的数据包/帧到达边缘节点时，都会使用底层组播组的目标IP地址进行VXLAN封装。在某些场景中，L2泛洪可应用于ARP解析：
- 命令flood arp-nd在VLAN的L2 LISP实例下配置，广播ARP帧使用广播底层组播组泛洪到所有交换矩阵边缘。
- 当在池中启用L2泛洪，并且池未标记为无线池时，flood arp-nd命令在Cisco Catalyst Center上配置
- 底层组播必须通过LAN自动化或手动配置进行配置。所有交换矩阵组播工作流程都不自动配置底层组播。
一旦配置了底层组播并启用了泛洪arp-nd，这将更改最初使用基于LISP/SISF的解析的ARP请求的处理方式。在L2 LISP实例下配置flood arp-nd后，这会禁用VLAN的LISP-ARP-RELAY-VLAN IPDT策略，并且不会使用。
Edge-1#show device-tracking policies vlan 1026 Target Type Policy Feature Target range vlan 1026 VLAN DT-PROGRAMMATIC Device-tracking vlan all vlan 1026 VLAN LISP-DT-GLEAN-VLAN-MULTI-IP Device-tracking vlan all
泛洪路径ARP请求验证
Edge-1(10.47.1.12)
从启用L2泛洪且配置了arp-nd的VLAN中的客户端收到ARP请求后，将不再由ARP监听进行处理。将ARP请求传送到CPU以进行IPDT学习，但不用于转发。
ARP监听程序不处理ARP请求，可以使用命令show platform arpsnooping client <MAC address>
Edge-1#show platform arpsnooping client 5254.0019.93e9
PLAT_DAI : Platform DAI shim
FWDPLANE : Dataplane forwarding
BRIDGE : Packet to be bridged
ARPSN : Arp Snooping
Packet Trace for client MAC 5254.0019.93E9:
Timestamp Sender Mac Sender IP Target Mac Target IP Opcode VLAN Handler:Action
----------------------- --------------- ------------- ----------------- -------------- ------------ ------- ------------------------------
Filtered entries counters:
ARPSN_FILTER_SVI: 0
Edge-1不会为终端10.47.4.3创建RMT IPDT条目，如输出所示
Edge-1#show monitor capture 1 buffer display-filter arp brief
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
1 0.000000 52:54:00:19:93:e9 -> ff:ff:ff:ff:ff:ff ARP 60 Who has 10.47.4.3? Tell 10.47.4.2
Edge-1#show device-tracking database address 10.47.4.3
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
现在，ARP请求通过VXLAN封装到广播底层组播组中。Edge-1有一个mroute，Loopback0作为源，组作为广播底层组。
Edge-1#show run int lo0 Building configuration... Current configuration : 135 bytes ! interface Loopback0 ip address 10.47.1.12 255.255.255.255 no ip redirects ip pim sparse-mode <-- PIM must be enabled ip router isis clns mtu 1400 end
Edge-1#show ip mroute 239.0.17.2
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry, E - Extranet,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group,
G - Received BGP C-Mroute, g - Sent BGP C-Mroute,
N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,
Q - Received BGP S-A Route, q - Sent BGP S-A Route,
V - RD & Vector, v - Vector, p - PIM Joins on route,
x - VxLAN group, c - PFP-SA cache created entry,
* - determined by Assert, # - iif-starg configured on rpf intf,
e - encap-helper tunnel flag, l - LISP decap ref count contributor
Outgoing interface flags: H - Hardware switched, A - Assert winner, p - PIM Join
t - LISP transit group
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.0.17.2), 5w1d/00:02:05, RP 10.47.1.14, flags: SJC
Incoming interface: GigabitEthernet1/0/2, RPF nbr 10.47.1.4
Outgoing interface list:
L2LISP0.8190, Forward/Sparse-Dense, 01:56:41/00:00:18, flags:
L2LISP0.8192, Forward/Sparse-Dense, 2w2d/00:00:58, flags:
L2LISP0.8188, Forward/Sparse-Dense, 5w1d/00:01:58, flags:
(10.47.1.12, 239.0.17.2), 00:02:53/00:00:06, flags: PFT <-- Lo0 interface of Edge-1
Incoming interface: Null0, RPF nbr 0.0.0.0, <-- Incoming interface Null0 is expected
Outgoing interface list:
GigabitEthernet1/0/2, Forward/Sparse, 00:04:40/00:02:45, flags: <-- Outgoing interface Gig1/0/2 faces the fabric underlay
实际上，泛洪arp-nd会切换IPDT/SISF，而不是泛洪本身。L2泛洪已泛洪广播流量，但关键在于将LISP AR策略从设备跟踪中禁用，ARP的所有权现在已释放，而且可以像任何其他广播一样泛洪。
要验证L2泛洪的硬件编程，请使用命令show platform software dpidb l2lisp <L2 LISP IID>
Edge-1#show platform software dpidb l2lisp 8190 Instance Id:8190, dpidx:25, vlan:1026, Parent Interface:L2LISP0(if_id:23) <-- dpidx value used in the next command
从上一个命令获取dpidx值，并在命令show platform software fed switch active if-id <dpidx value>
Edge-1#show platform software fed switch active ifm if-id 25 Interface IF_ID : 0x0000000000000019 Interface Name : L2LISP0.8190 Interface Block Pointer : 0x7f65ec85ba78 Interface Block State : READY Interface State : Enabled Interface Status : ADD, UPD Interface Ref-Cnt : 2 Interface Type : L2_LISP Created Time : 2023/09/19 17:57:32.046 Last Modified Time : 2023/10/25 17:59:09.265 Current Time : 2023/10/25 20:15:44.624 Is top interface : FALSE Asic_num : 0 Switch_num : 0 AAL port Handle : 7a00003a Parent interface id : 17 Multicast Tunnel IP : 239.0.17.2 Mcast Tunnel Handle : 0x7f65ed356918 L2 Multicast Tunnel IP : 0.0.0.0 L2 Multicast Vlan Id : 0 L2 Multicast Tunnel Hdl : NULL Vlan Id : 1026 Instance Id : 8190 Dest Port : 4789 SGT : Enable Underlay VRF (V4) : 0 Underlay VRF (V6) : 0 Flood Access-tunnel : Disable Flood unknown ucast : Enable Broadcast : Enable Multicast Flood : Enable L2 Multicast Flood : Disable Host Activity report: Enabled <snip>
您可以在出口方向使用Gi1/0/2上的EPC，因为此ARP请求被传入和传出，而不需要CPU注入，因此这次您可以在出口决策中信任EPC捕获。
Edge-1#monitor capture 1 start Started capture point : 1 Edge-1#monitor capture 1 stop Capture statistics collected at software: Capture duration - 22 seconds Packets received - 5 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 110 Who has 10.47.4.3? Tell 10.47.4.2 <-- Size 110 because VXLAN, UDP, and other headers
您可以仔细查看VXLAN封装的ARP请求
Edge-1#show monitor capture 1 buffer display-filter frame.number==1 detailed
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
Frame 1: 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 25, 2023 20:44:36.578645000 UTC
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1698266676.578645000 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: 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: 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) <-- Ignore the all 0s MAC, not accurate
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: 239.0.17.2 <-- Source is Edge-1 RLOC, Destination is the broadcast underlay group
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: 0x8dab (36267)
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: 255
Protocol: UDP (17)
Header checksum: 0xe2a3 [validation disabled]
[Header checksum status: Unverified]
Source: 10.47.1.12
Destination: 239.0.17.2
User Datagram Protocol, Src Port: 65280, Dst Port: 4789
Source Port: 65280
Destination Port: 4789
Length: 76
[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): 8190 <-- L2 LISP IID
Reserved: 0
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 and DMAC of the ARP Request
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)
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
Edge-2(10.47.1.13)
Edge-2加入广播底层组239.0.17.2并具有Edge-1的S、G，它在Gig1/0/1上接收VXLAN封装的组播数据包，而LISP0.8190子接口在传出接口列表中。早期版本的代码（如17.3或更早版本）使用隧道接口而不是LISP0子接口。
Edge-2#show ip mroute 239.0.17.2
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry, E - Extranet,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group,
G - Received BGP C-Mroute, g - Sent BGP C-Mroute,
N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,
Q - Received BGP S-A Route, q - Sent BGP S-A Route,
V - RD & Vector, v - Vector, p - PIM Joins on route,
x - VxLAN group, c - PFP-SA cache created entry,
* - determined by Assert, # - iif-starg configured on rpf intf,
e - encap-helper tunnel flag, l - LISP decap ref count contributor
Outgoing interface flags: H - Hardware switched, A - Assert winner, p - PIM Join
t - LISP transit group
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.0.17.2), 5w1d/stopped, RP 10.47.1.14, flags: SJC
Incoming interface: GigabitEthernet1/0/1, RPF nbr 10.47.1.6
Outgoing interface list:
L2LISP0.8190, Forward/Sparse-Dense, 02:28:57/00:01:02, flags:
L2LISP0.8192, Forward/Sparse-Dense, 2w2d/00:00:32, flags:
L2LISP0.8188, Forward/Sparse-Dense, 5w1d/00:02:54, flags:
(10.47.1.12, 239.0.17.2), 00:00:03/00:02:56, flags: JT
Incoming interface: GigabitEthernet1/0/1, RPF nbr 10.47.1.6 <-- Interface that faces the fabric underlay and the RPF interface towards 10.47.1.12
Outgoing interface list:
L2LISP0.8188, Forward/Sparse-Dense, 00:00:03/00:02:56, flags:
L2LISP0.8192, Forward/Sparse-Dense, 00:00:03/00:02:56, flags:
L2LISP0.8190, Forward/Sparse-Dense, 00:00:03/00:02:56, flags:
Edge-2接收VXLAN封装数据包，弹出VXLAN报头并将数据包泛洪到VLAN 1026，可在传入接口以及面向终端的接口的EPC中看到。
Edge-2#monitor capture 1 interface gig1/0/1 in match any Edge-2#monitor capture 1 int g1/0/3 out Edge-2#monitor capture 1 start Started capture point : 1 Edge-2#monitor capture 1 stop Capture statistics collected at software: Capture duration - 22 seconds Packets received - 43 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 display-filter arp Starting the packet display ........ Press Ctrl + Shift + 6 to exit 10 6.230153 52:54:00:19:93:e9 -> ff:ff:ff:ff:ff:ff ARP 110 Who has 10.47.4.3? Tell 10.47.4.2 <-- Size 110 is the VXLAN encapsulated ARP Request 11 6.404781 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 <-- Size 60 is the original ARP Request
泛洪路径ARP应答验证
ARP应答几乎都是单播，除非它们是无故ARP。对于单播ARP应答，基于LISP/SISF的单播路径的工作流程与基于泛洪arp-nd的泛洪路径的工作流程没有区别，两者使用包括SISF/IPDT检测的同一单播路径。您可以使用单播路径ARP应答验证部分进行故障排除。
修订历史记录
| 版本 | 发布日期 | 备注 |
|---|---|---|
2.0 |
26-Oct-2023 |
首次公开发布 |
1.0 |
12-Aug-2020 |
初始版本 |
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