在Catalyst 9000X系列交換機上配置IPsec
簡介
本檔案介紹如何驗證Catalyst 9300X交換器上的網際網路通訊協定安全(IPsec)功能。
必要條件
需求
思科建議您瞭解以下主題：
- IPsec
採用元件
本文中的資訊係根據以下軟體和硬體版本：
- C9300
- C9400
- Cisco IOS® XE 17.6.4及更高版本
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。
背景資訊
從Cisco IOS® XE 17.5.1開始，Catalyst 9300-X系列交換機支援IPsec。IPsec透過加密和身份驗證提供高級別的安全性，並保護資料免遭未經授權的訪問。C9300X上的IPsec實施使用sVTI（靜態虛擬隧道介面）配置在兩個對等體之間提供安全隧道。
Cisco IOS® XE 17.10.1中引入了Catalyst 9400-X系列交換機上的IPsec支援，而Catalyst 9500-X的支援預定為17.12.1。
技術
| IOSd |
IOS守護程式 |
這是在Linux核心上運行的Cisco IOS守護程式。它在核心中作為軟體進程運行。IOSdprocesses CLI命令和協定，用於建立狀態和配置。 |
| PD |
視平台而定 |
運行平台的特定資料和命令 |
| IPsec |
網際網路通訊協定安全性 |
一種安全網路協定簇，它驗證和加密資料的間隔，以便透過Internet協定網路在兩台電腦之間提供安全的加密通訊。 |
| SVTI |
靜態虛擬通道介面 |
靜態配置的虛擬介面，您可以對其應用安全功能 |
| SA |
安全性關聯 |
SA是兩個或多個實體之間的關係，描述實體如何使用安全服務進行安全通訊 |
| FED |
轉發引擎驅動程式 |
負責UADP ASIC硬體程式設計的交換機元件 |
設定
網路圖表
在本示例中，Catalyst 9300X和ASR1001-X作為IPsec對等體與IPsec虛擬隧道介面起作用。
安裝HSEC許可證
在Catalyst 9300X平台上啟用IPSec功能，需要HSEC許可證(C9000-HSEC)。這與支援IPSec的基於Cisco IOS XE的其他路由平台不同，在該平台中，僅需要使用HSEC許可證來增加允許的加密吞吐量。在Catalyst 9300X平台上，如果未安裝HSEC許可證，則隧道模式和隧道保護 CLI將被阻止：
C9300X(config)#int tunnel1
C9300X(config-if)#tunnel mode ipsec ipv4
%'tunnel mode' change not allowed
*Sep 19 20:54:41.068: %PLATFORM_IPSEC_HSEC-3-INVALID_HSEC: HSEC license not present: IPSec mode configuration is rejected
使用智慧許可在交換機連線到CSSM或CSLU時安裝HSEC許可證：
C9300X#license smart authorization request add hseck9 local
*Oct 12 20:01:36.680: %SMART_LIC-6-AUTHORIZATION_INSTALL_SUCCESS: A new licensing authorization code was successfully installed on PID:C9300X-24Y,SN:FOC2522L1W7
驗證已正確安裝HSEC許可證：
C9300X#show license summ
Account Information:
Smart Account: Cisco Systems, TAC As of Oct 13 15:50:35 2022 UTC
Virtual Account: CORE TAC
License Usage:
License Entitlement Tag Count Status
-----------------------------------------------------------------------------
network-advantage (C9300X-12Y Network Adv...) 1 IN USE
dna-advantage (C9300X-12Y DNA Advantage) 1 IN USE
C9K HSEC (Cat9K HSEC) 0 NOT IN USE
在隧道介面上啟用IPsec作為隧道模式：
C9300X(config)#int tunnel1
C9300X(config-if)#tunnel mode ipsec ipv4
C9300X(config-if)#end
一旦啟用IPSec，HSEC許可證就會被使用
C9300X#show license summ
Account Information:
Smart Account: Cisco Systems, TAC As of Oct 13 15:50:35 2022 UTC
Virtual Account: CORE TAC
License Usage:
License Entitlement Tag Count Status
-----------------------------------------------------------------------------
network-advantage (C9300X-12Y Network Adv...) 1 IN USE
dna-advantage (C9300X-12Y DNA Advantage) 1 IN USE
C9K HSEC (Cat9K HSEC) 1 IN USE
SVTI通道保護
C9300X上的IPsec配置使用標準Cisco IOS XE IPsec配置。這是使用IKEv2 Smart Defaults的簡單SVTI配置，其中我們使用IKEv2的預設IKEv2策略、IKEv2方案、IPsec轉換和IKEv2的IPsec配置檔案。
C9300X配置
ip routing
!
crypto ikev2 profile default
match identity remote address 192.0.2.2 255.255.255.255
authentication remote pre-share key cisco123
authentication local pre-share key cisco123
!
interface Tunnel1
ip address 192.168.1.1 255.255.255.252
tunnel source 198.51.100.1
tunnel mode ipsec ipv4
tunnel destination 192.0.2.2
tunnel protection ipsec profile default
對等配置
crypto ikev2 profile default
match identity remote address 198.51.100.1 255.255.255.255
authentication remote pre-share key cisco123
authentication local pre-share key cisco123
!
interface Tunnel1
ip address 192.168.1.2 255.255.255.252
tunnel source 192.0.2.2
tunnel mode ipsec ipv4
tunnel destination 198.51.100.1
tunnel protection ipsec profile default
有關各種IKEv2和IPsec配置結構的更詳細討論，請參閱C9300X IPsec配置指南。
驗證
IPsec通道
C9300X平台上的IPsec實施在架構上不同於路由平台（ASR1000、ISR4000、Catalyst 8200/8300等），其中IPsec功能處理在QFP（量子流處理器）微碼中實現。
C9300X轉發架構基於UADP ASIC，因此大多數QFP功能FIA實施不適用於此處。
以下是一些主要區別：
- show crypto ipsec sa peer x.x.x.x platform不顯示從FMAN到QFP的平台程式設計資訊。
- Packet-trace也不起作用（有關以下內容的詳細資訊）。
- UADP ASIC不支援加密流量分類，因此show crypto ruleset platform不適用
IOSd控制平面
IPsec控制平面驗證與路由平台的驗證完全相同，請參閱。要顯示IOSd中安裝的IPsec SA，請執行以下操作：
C9300X#show crypto ipsec sa
interface: Tunnel1
Crypto map tag: Tunnel1-head-0, local addr 198.51.100.1
protected vrf: (none)
local ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
remote ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
current_peer 192.0.2.2 port 500
PERMIT, flags={origin_is_acl,}
#pkts encaps: 200, #pkts encrypt: 200, #pkts digest: 200
#pkts decaps: 200, #pkts decrypt: 200, #pkts verify: 200
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0
#pkts not decompressed: 0, #pkts decompress failed: 0
#send errors 0, #recv errors 0
local crypto endpt.: 198.51.100.1, remote crypto endpt.: 192.0.2.2
plaintext mtu 1438, path mtu 1500, ip mtu 1500, ip mtu idb TwentyFiveGigE1/0/1
current outbound spi: 0x42709657(1114674775)
PFS (Y/N): N, DH group: none
inbound esp sas:
spi: 0x4FE26715(1340237589)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2098, flow_id: CAT9K:98, sibling_flags FFFFFFFF80000048, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (26/1605)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
inbound ah sas:
inbound pcp sas:
outbound esp sas:
spi: 0x42709657(1114674775)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2097, flow_id: CAT9K:97, sibling_flags FFFFFFFF80000048, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (32/1605)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
outbound ah sas:
outbound pcp sas:
注意輸出中的flow_id，它必須與轉發平面中安裝的流id匹配。
PD控制平面
IOSd和PD控制平面之間的統計資訊
C9300X#show platfor software ipsec policy statistics
PAL CMD REQUEST REPLY OK REPLY ERR ABORT
SADB_INIT_START 3 3 0 0
SADB_INIT_COMPLETED 3 3 0 0
SADB_DELETE 2 2 0 0
SADB_ATTR_UPDATE 4 4 0 0
SADB_INTF_ATTACH 3 3 0 0
SADB_INTF_UPDATE 0 0 0 0
SADB_INTF_DETACH 2 2 0 0
ACL_INSERT 4 4 0 0
ACL_MODIFY 0 0 0 0
ACL_DELETE 3 3 0 0
PEER_INSERT 7 7 0 0
PEER_DELETE 6 6 0 0
SPI_INSERT 39 37 2 0
SPI_DELETE 36 36 0 0
CFLOW_INSERT 5 5 0 0
CFLOW_MODIFY 33 33 0 0
CFLOW_DELETE 4 4 0 0
IPSEC_SA_DELETE 76 76 0 0
TBAR_CREATE 0 0 0 0
TBAR_UPDATE 0 0 0 0
TBAR_REMOVE 0 0 0 0
0 0 0 0
PAL NOTIFY RECEIVE COMPLETE PROC ERR IGNORE
NOTIFY_RP 0 0 0 0
SA_DEAD 0 0 0 0
SA_SOFT_LIFE 46 46 0 0
IDLE_TIMER 0 0 0 0
DPD_TIMER 0 0 0 0
INVALID_SPI 0 0 0 0
0 5 0 0
VTI SADB 0 33 0 0
TP SADB 0 40 0 0
IPSec PAL database summary:
DB NAME ENT ADD ENT DEL ABORT
PAL_SADB 3 2 0
PAL_SADB_ID 3 2 0
PAL_INTF 3 2 0
PAL_SA_ID 76 74 0
PAL_ACL 0 0 0
PAL_PEER 7 6 0
PAL_SPI 39 38 0
PAL_CFLOW 5 4 0
PAL_TBAR 0 0 0
SADB物件表格
C9300X#show plat software ipsec switch active f0 sadb all IPsec SADB object table: SADB-ID Hint Complete #RefCnt #CfgCnt #ACL-Ref ----------------------------------------------------------------------- 3 vir-tun-int true 2 0 0
SADB條目
C9300X#show plat software ipsec switch active f0 sadb identifier 3
=========== SADB id: 3
hint: vir-tun-int
completed: true
reference count: 2
configure count: 0
ACL reference: 0
SeqNo (Static/Dynamic) ACL id
-----------------------------------------
IPsec流資訊
C9300X#show plat software ipsec switch active f0 flow all
=========== Flow id: 97
mode: tunnel
direction: outbound
protocol: esp
SPI: 0x42709657
local IP addr: 198.51.100.1
remote IP addr: 192.0.2.2
crypto map id: 0
SPD id: 3
cpp SPD id: 0
ACE line number: 0
QFP SA handle: INVALID
crypto device id: 0
IOS XE interface id: 65
interface name: Tunnel1
use path MTU: FALSE
object state: active
object bind state: new
=========== Flow id: 98
mode: tunnel
direction: inbound
protocol: esp
SPI: 0x4fe26715
local IP addr: 198.51.100.1
remote IP addr: 192.0.2.2
crypto map id: 0
SPD id: 3
cpp SPD id: 0
ACE line number: 0
QFP SA handle: INVALID
crypto device id: 0
IOS XE interface id: 65
interface name: Tunnel1
object state: active
疑難排解
IOSd
通常會收集以下debug和show命令：
show crypto eli all
show crypto socket
show crypto map
show crypto ikev2 sa detail
show crypto ipsec sa
show crypto ipsec internal
debug crypto ikev2
debug crypto ikev2 error
debug crypto ikev2 packet
debug crypto ipsec
debug crypto ipsec error
debug crypto kmi
debug crypto socket
debug tunnel protection
PD控制平面
要檢驗PD控制平面操作，請使用前面顯示的檢驗步驟。要調試與PD控制平面相關的所有問題，請啟用PD控制平面調試：
1. 將btrace日誌記錄級別提升至詳細：
C9300X#set platform software trace forwarding-manager switch active f0 ipsec verbose
C9300X#show platform software trace level forwarding-manager switch active f0 | in ipsec ipsec Verbose
2. 啟用PD控制平面條件調試：
C9300X#debug platform condition feature ipsec controlplane submode level verbose
C9300X#show platform conditions Conditional Debug Global State: Stop Feature Type Submode Level ------------|-------------|----------------------------------------------------------------------|---------- IPSEC controlplane N/A verbose
3. 收集 fman_fp btrace輸出的調試輸出：
C9300X#show logging process fman_fp module ipsec internal
Logging display requested on 2022/10/19 20:57:52 (UTC) for Hostname: [C9300X], Model: [C9300X-24Y], Version: [17.07.01], SN: [FOC251531YZ], MD_SN: [FOC2522L1W7]
Displaying logs from the last 0 days, 0 hours, 10 minutes, 0 seconds
executing cmd on chassis 1 ...
Unified Decoder Library Init .. DONE
Found 1 UTF Streams
2022/10/19 20:50:36.686071658 {fman_fp_F0-0}{1}: [ipsec] [22441]: (ERR): IPSEC-PAL-IB-Key::
2022/10/19 20:50:36.686073648 {fman_fp_F0-0}{1}: [ipsec] [22441]: (ERR): IPSEC-b0 d0 31 04 85 36 a6 08 8c 22 d2 37 b4 63 20 b9 6e 71 aa 0a 4b 26 25 56 6c 62 45 b7 31 a1 9f 3b eb 82 e8 61 ...
PD資料平面
驗證資料層面IPsec隧道統計資訊，包括常見IPsec丟棄（例如HMAC或重播故障）
C9300X#show platform software fed sw active ipsec counters if-id all ######################################## Flow Stats for if-id 0x41 ######################################## ----------------------------------- Inbound Flow Info for flow id: 98 ------------------------------ SA Index: 1 -------------------- Asic Instance 0: SA Stats Packet Format Check Error: 0 Invalid SA: 0 Auth Fail: 0 Sequence Number Overflows: 0 Anti-Replay Fail: 0 Packet Count: 200 Byte Count: 27600 ----------------------------------- Outbound Flow Info for flow id: 97 ------------------------------ SA Index: 1025 -------------------- Asic Instance 0: SA Stats Packet Format Check Error: 0 Invalid SA: 0 Auth Fail: 0 Sequence Number Overflows: 0 Anti-Replay Fail: 0 Packet Count: 200 Byte Count: 33600
注意：流ID與show crypto ipsec sa輸出中的流ID匹配。使用show platform software fed switch active ipsec counters sa <sa_id>命令還可以獲取單個流統計資料，其中sa_id是前面輸出中的SA索引。
資料平面Packet Tracer
UADP ASIC平台上的Packet Tracer與基於QFP的系統上的Packet Tracer的行為完全不同。可以使用手動觸發器或基於PCAP的觸發器啟用它。以下是使用基於PCAP (EPC)的觸發器的示例。
1. 啟用EPC並開始捕獲：
C9300X#monitor capture test interface twentyFiveGigE 1/0/2 in match ipv4 10.1.1.2/32 any
C9300X#show monitor capture test
Status Information for Capture test
Target Type:
Interface: TwentyFiveGigE1/0/2, Direction: IN
Status : Inactive
Filter Details:
IPv4
Source IP: 10.1.1.2/32
Destination IP: any
Protocol: any
Buffer Details:
Buffer Type: LINEAR (default)
Buffer Size (in MB): 10
File Details:
File not associated
Limit Details:
Number of Packets to capture: 0 (no limit)
Packet Capture duration: 0 (no limit)
Packet Size to capture: 0 (no limit)
Maximum number of packets to capture per second: 1000
Packet sampling rate: 0 (no sampling)
2.執行其餘專案並停止擷取：
C9300X#monitor capture test start Started capture point : test *Oct 18 18:34:09.656: %BUFCAP-6-ENABLE: Capture Point test enabled. <run traffic test>
C9300X#monitor capture test stop Capture statistics collected at software: Capture duration - 23 seconds Packets received - 5 Packets dropped - 0 Packets oversized - 0 Bytes dropped in asic - 0 Capture buffer will exists till exported or cleared Stopped capture point : test
3. 將擷取匯出至快閃記憶體
C9300X#show monitor capture test buff
*Oct 18 18:34:33.569: %BUFCAP-6-DISABLE
Starting the packet display ........ Press Ctrl + Shift + 6 to exit
1 0.000000 10.1.1.2 -> 10.2.1.2 ICMP 114 Echo (ping) request id=0x0003, seq=0/0, ttl=255
2 0.000607 10.1.1.2 -> 10.2.1.2 ICMP 114 Echo (ping) request id=0x0003, seq=1/256, ttl=255
3 0.001191 10.1.1.2 -> 10.2.1.2 ICMP 114 Echo (ping) request id=0x0003, seq=2/512, ttl=255
4 0.001760 10.1.1.2 -> 10.2.1.2 ICMP 114 Echo (ping) request id=0x0003, seq=3/768, ttl=255
5 0.002336 10.1.1.2 -> 10.2.1.2 ICMP 114 Echo (ping) request id=0x0003, seq=4/1024, ttl=255
C9300X#monitor capture test export location flash:test.pcap
4.運行Packet Tracer：
C9300X#show platform hardware fed switch 1 forward interface TwentyFiveGigE 1/0/2 pcap flash:test.pcap number 1
Show forward is running in the background. After completion, syslog will be generated.
C9300X#
*Oct 18 18:36:56.288: %SHFWD-6-PACKET_TRACE_DONE: Switch 1 F0/0: fed: Packet Trace Complete: Execute (show platform hardware fed switch <> forward last summary|detail)
*Oct 18 18:36:56.288: %SHFWD-6-PACKET_TRACE_FLOW_ID: Switch 1 F0/0: fed: Packet Trace Flow id is 131077
C9300X#
C9300X#show plat hardware fed switch 1 forward last summary
Input Packet Details:
###[ Ethernet ]###
dst = b0:8b:d0:8d:6b:d6
src=78:ba:f9:ab:a7:03
type = 0x800
###[ IP ]###
version = 4
ihl = 5
tos = 0x0
len = 100
id = 15
flags =
frag = 0
ttl = 255
proto = icmp
chksum = 0xa583
src=10.1.1.2
dst = 10.2.1.2
options = ''
###[ ICMP ]###
type = echo-request
code = 0
chksum = 0xae17
id = 0x3
seq = 0x0
###[ Raw ]###
load = '00 00 00 00 01 1B CF 14 AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD AB CD'
Ingress:
Port : TwentyFiveGigE1/0/2
Global Port Number : 2
Local Port Number : 2
Asic Port Number : 1
Asic Instance : 1
Vlan : 4095
Mapped Vlan ID : 1
STP Instance : 1
BlockForward : 0
BlockLearn : 0
L3 Interface : 38
IPv4 Routing : enabled
IPv6 Routing : enabled
Vrf Id : 0
Adjacency:
Station Index : 179
Destination Index : 20754
Rewrite Index : 24
Replication Bit Map : 0x1 ['remoteData']
Decision:
Destination Index : 20754 [DI_RCP_PORT3]
Rewrite Index : 24
Dest Mod Index : 0 [IGR_FIXED_DMI_NULL_VALUE]
CPU Map Index : 0 [CMI_NULL]
Forwarding Mode : 3 [Other or Tunnel]
Replication Bit Map : ['remoteData']
Winner : L3FWDIPV4 LOOKUP
Qos Label : 1
SGT : 0
DGTID : 0
Egress:
Possible Replication :
Port : RCP
Asic Instance : 0
Asic Port Number : 0
Output Port Data :
Port : RCP
Asic Instance : 0
Asic Port Number : 90
Unique RI : 0
Rewrite Type : 0 [Unknown]
Mapped Rewrite Type : 229 [IPSEC_TUNNEL_MODE_ENCAP_FIRSTPASS_OUTERV4_INNERV4]
Vlan : 0
Mapped Vlan ID : 0
RCP, mappedRii.fdMuxProfileSet = 1 , get fdMuxProfile from MappedRii
Qos Label : 1
SGT : 0
********************************************************************************
Input Packet Details:
N/A: Recirculated Packet
Ingress:
Port : Recirculation Port
Asic Port Number : 90
Asic Instance : 0
Vlan : 0
Mapped Vlan ID : 2
STP Instance : 0
BlockForward : 0
BlockLearn : 0
L3 Interface : 38
IPv4 Routing : enabled
IPv6 Routing : enabled
Vrf Id : 0
Adjacency:
Station Index : 177
Destination Index : 21304
Rewrite Index : 21
Replication Bit Map : 0x1 ['remoteData']
Decision:
Destination Index : 21304
Rewrite Index : 21
Dest Mod Index : 0 [IGR_FIXED_DMI_NULL_VALUE]
CPU Map Index : 0 [CMI_NULL]
Forwarding Mode : 3 [Other or Tunnel]
Replication Bit Map : ['remoteData']
Winner : L3FWDIPV4 LOOKUP
Qos Label : 1
SGT : 0
DGTID : 0
Egress:
Possible Replication :
Port : TwentyFiveGigE1/0/1
Output Port Data :
Port : TwentyFiveGigE1/0/1
Global Port Number : 1
Local Port Number : 1
Asic Port Number : 0
Asic Instance : 1
Unique RI : 0
Rewrite Type : 0 [Unknown]
Mapped Rewrite Type : 13 [L3_UNICAST_IPV4_PARTIAL]
Vlan : 0
Mapped Vlan ID : 0
Output Packet Details:
Port : TwentyFiveGigE1/0/1
###[ Ethernet ]###
dst = 00:62:ec:da:e0:02
src=b0:8b:d0:8d:6b:e4
type = 0x800
###[ IP ]###
version = 4
ihl = 5
tos = 0x0
len = 168
id = 2114
flags = DF
frag = 0
ttl = 254
proto = ipv6_crypt
chksum = 0x45db
src=198.51.100.1
dst = 192.0.2.2
options = ''
###[ Raw ]### load = '6D 18 45 C9 00 00 00 06 09 B0 DC 13 11 FA DC F8 63 98 51 98 33 11 9C C0 D7 24 BF C2 1C 45 D3 1B 91 0B 5F B4 3A C0 AD 18 1A 9C 34 32 19 67 D9 EE 30 F4 CE 6B B9 E7 E5 41 33 E7 97 86 68 14 C0 4D 86 49 88 E7 3A 7E 3E E3 5C C7 CE C9 C4 C8 FC 41 33 43 DD 9B F8 E1 0F A6 71 C3 69 A9 51 1F 98 0D FE EF 58 18 31 0C 77 00 34 3D 81 92 A9 05 12 05 43 0E 9E 11 03 68 83 78 EC D1 C0 06 7A 34 54 8D 82 83 BA 60 58 1A FB 3A BA 1A 9F CF 44 12 CD 5D 4A D4 8E 10'
********************************************************************************
C9300X#show crypto ipsec sa | in current outbound
current outbound spi: 0x6D1845C9(1830307273) <-- Matches the load result in packet trace
注意：在前面的輸出中，轉發到出口的資料包是具有當前出站SA SPI的ESP資料包。要獲得更詳細的FED轉發決策分析，可使用同一命令的detail變體。示例：可以使用show plat hardware fed switch 1 forward last detail。
PD資料平面調試
注意：只能在TAC的幫助下啟用PD資料平面調試。如果無法通過常規CLI/調試辨識問題，則工程需要這些非常低級別的跟蹤。
C9300X#set platform software trace fed switch active ipsec verbose
C9300X#debug platform condition feature ipsec dataplane submode all level verbose
C9300X#show logging process fed module ipsec internal
IPsec PD SHIM調試
debug platform software ipsec info
debug platform software ipsec error
debug platform software ipsec verbose
debug platform software ipsec all
相關資訊
修訂記錄
| 修訂 | 發佈日期 | 意見 |
|---|---|---|
1.0 |
17-Jan-2024 |
初始版本 |
意見