安全与 VPN : IPSec 协商/IKE 协议

使用 GRE 通道配置带有 EIGRP 和 IPX 的 IPSec

2016 年 10 月 24 日 - 机器翻译
其他版本: PDFpdf | 英语 (2015 年 8 月 22 日) | 反馈


目录


简介

普通的 IPSec 配置不能传输路由协议,例如 Enhanced Interior Gateway Routing Protocol (EIGRP) 和 Open Shortest Path First (OSPF),也不能传输非 IP 数据流,例如互联网分组交换 (IPX)、AppleTalk 等。本文说明了如何使用路由协议和IPSec,在不同网络之间路由非IP数据流。此技术使用通用路由封装 (GRE) 作为实现此功能的方法。

先决条件

要求

尝试进行此配置之前,请确保满足以下要求:

  • 在应用加密映射之前,请确保隧道正常工作。

  • 加密访问列表需要将 GRE 作为允许的协议:access-list 101 permit gre host x.x.x.x host y.y.y.y x.x.x.x = <tunnel_source> y.y.y.y = <tunnel_destination>

  • 使用回环IP地址识别互联网密钥交换(IKE)对等体及隧道源和隧道目的地,以改进其可用性。

  • 有关可能的最大传输单元 (MTU) 问题的讨论,请参阅在 Windows 和 Sun 系统上调整 IP MTU、TCP MSS 和 PMTUD

使用的组件

本文档中的信息基于以下软件和硬件版本:

  • Cisco IOSï ¿  ½软件版本12.1.8和12.2.1

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。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。

规则

有关文档规则的详细信息,请参阅 Cisco 技术提示规则

配置

本部分提供有关如何配置本文档所述功能的信息。

注意: 要查找本文档所用命令的其他信息,请使用命令查找工具仅限注册用户)。

IOS 配置说明:使用 Cisco IOS 软件版本 12.2(13)T 及更高版本代码(编号更高的 T 训练代码、Cisco IOS 软件版本 12.3 及更高版本代码),只需将配置的 IPSEC“加密映射”应用到物理接口,而不再需要将其应用到 GRE 隧道接口。使用 Cisco IOS 软件版本 12.2.(13)T 及更高版本的代码仍能正常工作时,请在物理和隧道接口上应用“加密映射”。不过,强烈建议仅在物理接口上应用它。

网络图

本文档使用此图所示的网络设置。

/image/gif/paws/14136/ipsec_gre.gif

配置

Current configuration:
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Light
!
logging rate-limit console 10 except errors
!
ip subnet-zero
!
!
no ip finger
!
no ip dhcp-client network-discovery
ipx routing 00e0.b06a.40fc
!

!--- IKE policies.

crypto isakmp policy 25
hash md5
authentication pre-share
crypto isakmp key cisco123 address 192.168.2.1
!

!--- IPSec policies.

crypto ipsec transform-set WWW esp-des esp-md5-hmac 
mode transport
!
crypto map GRE local-address Loopback0
crypto map GRE 50 ipsec-isakmp   
set peer 192.168.2.1
set transform-set WWW 

!--- What to encrypt?

match address 101
!
call rsvp-sync
!
fax interface-type modem
mta receive maximum-recipients 0
!
interface Loopback0
ip address 192.168.1.1 255.255.255.0
!
interface Tunnel0
ip address 10.1.1.1 255.255.255.252
ip mtu 1440
ipx network CC
tunnel source Loopback0
tunnel destination 192.168.2.1
crypto map GRE
!
interface FastEthernet0/0
ip address 10.64.10.13 255.255.255.224
no ip route-cache
no ip mroute-cache
duplex auto
speed auto
crypto map GRE
!
interface FastEthernet0/1
ip address 172.16.1.1 255.255.255.0
duplex auto
speed auto
ipx network AA
!         
router eigrp 10
network 10.1.1.0 0.0.0.3
network 172.16.1.0 0.0.0.255
network 192.168.1.0
no auto-summary
no eigrp log-neighbor-changes
!
ip kerberos source-interface any
ip classless
ip route 192.168.2.0 255.255.255.0 10.64.10.14
ip http server
!

!--- What to encrypt?

access-list 101 permit gre host 192.168.1.1 host 192.168.2.1
!
dial-peer cor custom
!
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end

Light#!

议院
Current configuration:
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname House
!
ip subnet-zero
!
ipx routing 00e0.b06a.4114
!

!--- IKE policies.

crypto isakmp policy 25
hash md5
authentication pre-share
crypto isakmp key cisco123 address 192.168.1.1    
!

!--- IPSec policies.

crypto ipsec transform-set WWW esp-des esp-md5-hmac 
mode transport
!
crypto map GRE local-address Loopback0
crypto map GRE 50 ipsec-isakmp   
set peer 192.168.1.1
set transform-set WWW 

!--- What to encrypt?

match address 101
!
!
interface Loopback0
ip address 192.168.2.1 255.255.255.0
!
interface Tunnel0
ip address 10.1.1.2 255.255.255.252
ip mtu 1440
ipx network CC
tunnel source Loopback0
tunnel destination 192.168.1.1
crypto map GRE
!
interface FastEthernet0/0
ip address 10.64.10.14 255.255.255.224
no ip route-cache
no ip mroute-cache
duplex auto
speed auto
crypto map GRE
!
interface FastEthernet0/1
ip address 172.16.2.1 255.255.255.0
duplex auto
speed auto
ipx network BB
!
interface FastEthernet4/0
no ip address
shutdown
duplex auto
speed auto
!
router eigrp 10
network 10.1.1.0 0.0.0.3
network 172.16.2.0 0.0.0.255
network 192.168.2.0
no auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip route 192.168.1.0 255.255.255.0 10.64.10.13
ip http server

!--- What to encrypt?

access-list 101 permit gre host 192.168.2.1 host 192.168.1.1
!
line con 0
line aux 0
line vty 0 4
login
!
end

House#

验证

本部分提供的信息可帮助您确认您的配置是否可正常运行。

命令输出解释程序工具仅限注册用户)支持某些 show 命令,使用此工具可以查看对 show 命令输出的分析。

  • show crypto engine connections active - 显示 IPSec 对等体之间的加密和解密数据包。

  • show crypto isakmp sa — 显示第 1 阶段的安全关联。

  • show crypto ipsec sa - 显示第 2 阶段的安全连接。

  • show ipx route [network] [default] [detailed] - 显示 IPX 路由表的内容。

隧道开启时的 show 命令输出

Light#show ip route 
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.1.0 is directly connected, FastEthernet0/1
D       172.16.2.0 [90/297246976] via 10.1.1.2, 00:00:31, Tunnel0
     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.1.1.0/30 is directly connected, Tunnel0
C       10.64.10.0/27 is directly connected, FastEthernet0/0
C    192.168.1.0/24 is directly connected, Loopback0
S    192.168.2.0/24 [1/0] via 10.64.10.14
Light#ping        
Protocol [ip]: 
Target IP address: 172.16.2.1
Repeat count [5]: 
Datagram size [100]: 
Timeout in seconds [2]: 
Extended commands [n]: y
Source address or interface: 172.16.1.1
Type of service [0]: 
Set DF bit in IP header? [no]: 
Validate reply data? [no]: 
Data pattern [0xABCD]: 
Loose, Strict, Record, Timestamp, Verbose[none]: 
Sweep range of sizes [n]: 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Light#

House#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
D       172.16.1.0 [90/297246976] via 10.1.1.1, 00:00:36, Tunnel0
C       172.16.2.0 is directly connected, FastEthernet0/1
     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.1.1.0/30 is directly connected, Tunnel0
C       10.64.10.0/27 is directly connected, FastEthernet0/0
S    192.168.1.0/24 [1/0] via 10.64.10.13
C    192.168.2.0/24 is directly connected, Loopback0
House#ping 
Protocol [ip]: 
Target IP address: 172.16.1.1
Repeat count [5]: 
Datagram size [100]: 
Timeout in seconds [2]: 
Extended commands [n]: y
Source address or interface: 172.16.2.1
Type of service [0]: 
Set DF bit in IP header? [no]: 
Validate reply data? [no]: 
Data pattern [0xABCD]: 
Loose, Strict, Record, Timestamp, Verbose[none]: 
Sweep range of sizes [n]: 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

Light#show ipx route
Codes: C - Connected primary network,    c - Connected secondary network
       S - Static, F - Floating static, L - Local (internal), W - IPXWAN
       R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate
       s - seconds, u - uses, U - Per-user static

3 Total IPX routes. Up to 1 parallel paths and 16 hops allowed.

No default route known.

C         AA (NOVELL-ETHER),  Fa0/1
C         CC (TUNNEL),        Tu0
R         BB [151/01] via       CC.00e0.b06a.4114,   17s, Tu0

House#show ipx route
Codes: C - Connected primary network,    c - Connected secondary network
       S - Static, F - Floating static, L - Local (internal), W - IPXWAN
       R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate
       s - seconds, u - uses, U - Per-user static

3 Total IPX routes. Up to 1 parallel paths and 16 hops allowed.

No default route known.

C         BB (NOVELL-ETHER),  Fa0/1
C         CC (TUNNEL),        Tu0
R         AA [151/01] via       CC.00e0.b06a.40fc,   59s, Tu0

Light#ping ipx BB.0004.9af2.8261

Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to BB.0004.9af2.8261, timeout is 2 second:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

House#ping ipx AA.0004.9af2.8181 

Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to AA.0004.9af2.8181, timeout is 2 second:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

Light#show crypto isa sa
    dst           src          state        conn-id   slot
192.168.2.1    192.168.1.1    QM_IDLE           1       0
192.168.1.1    192.168.2.1    QM_IDLE           2       0

House#show crypto isa sa
    dst           src          state        conn-id   slot
192.168.1.1    192.168.2.1    QM_IDLE           1       0
192.168.2.1    192.168.1.1    QM_IDLE           2       0


Light#show crypto engine connections active

  ID Interface       IP-Address      State  Algorithm           Encrypt  Decrypt
   1 <none>          <none>          set    HMAC_MD5+DES_56_CB        0        0
   2 <none>          <none>          set    HMAC_MD5+DES_56_CB        0        0
2000 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB        0      161
2001 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB      161        0
2002 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB        0        0
2003 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB        0        0
2004 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB        0        0
2005 FastEthernet0/0 10.64.10.13     set    HMAC_MD5+DES_56_CB        0        0

House#show crypto engine connections active

  ID Interface       IP-Address      State  Algorithm           Encrypt  Decrypt
   1 <none>          <none>          set    HMAC_MD5+DES_56_CB        0        0
   2 <none>          <none>          set    HMAC_MD5+DES_56_CB        0        0
2000 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB        0      159
2001 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB      159        0
2002 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB        0        0
2003 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB        0        0
2004 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB        0        0
2005 FastEthernet0/0 10.64.10.14     set    HMAC_MD5+DES_56_CB        0        0

House#show crypto ipsec sa detail 

interface: Tunnel0
    Crypto map tag: GRE, local addr. 192.168.2.1

   local  ident (addr/mask/prot/port): (192.168.2.1/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (192.168.1.1/255.255.255.255/47/0)
   current_peer: 192.168.1.1
     PERMIT, flags={origin_is_acl,transport_parent,}
    #pkts encaps: 192, #pkts encrypt: 192, #pkts digest 192
    #pkts decaps: 190, #pkts decrypt: 190, #pkts verify 190
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
    #pkts no sa (send) 12, #pkts invalid sa (rcv) 0
    #pkts encaps failed (send) 0, #pkts decaps failed (rcv) 0
    #pkts invalid prot (recv) 0, #pkts verify failed: 0
    #pkts invalid identity (recv) 0, #pkts invalid len (rcv) 0
    #pkts replay rollover (send): 0, #pkts replay rollover (rcv) 0
    ##pkts replay failed (rcv): 0
    #pkts internal err (send): 0, #pkts internal err (recv) 0

     local crypto endpt.: 192.168.2.1, remote crypto endpt.: 192.168.1.1
     path mtu 1514, media mtu 1514
     current outbound spi: 1FA721CA
          
     inbound esp sas:
      spi: 0xEE52531(249898289)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4607961/2797)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0xFEE24F3(267265267)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2002, flow_id: 3, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2826)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x19240817(421791767)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2004, flow_id: 5, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2759)
        IV size: 8 bytes
        replay detection support: Y
          
     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x1FA721CA(531046858)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4607972/2797)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x12B10EB0(313593520)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2003, flow_id: 4, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2826)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x1A700242(443548226)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2005, flow_id: 6, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2759)
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:


   local  ident (addr/mask/prot/port): (192.168.2.1/255.255.255.255/0/0)
   remote ident (addr/mask/prot/port): (192.168.1.1/255.255.255.255/0/0)
   current_peer: 192.168.1.1
     PERMIT, flags={transport_parent,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
    #pkts no sa (send) 0, #pkts invalid sa (rcv) 0
    #pkts encaps failed (send) 0, #pkts decaps failed (rcv) 0
    #pkts invalid prot (recv) 0, #pkts verify failed: 0
    #pkts invalid identity (recv) 0, #pkts invalid len (rcv) 0
    #pkts replay rollover (send): 0, #pkts replay rollover (rcv) 0
    ##pkts replay failed (rcv): 0
    #pkts internal err (send): 0, #pkts internal err (recv) 0

     local crypto endpt.: 192.168.2.1, remote crypto endpt.: 192.168.1.1
     path mtu 1514, media mtu 1514
     current outbound spi: 0

     inbound esp sas:

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:

     outbound ah sas:

     outbound pcp sas:



interface: FastEthernet0/0
    Crypto map tag: GRE, local addr. 192.168.2.1
          
   local  ident (addr/mask/prot/port): (192.168.2.1/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (192.168.1.1/255.255.255.255/47/0)
   current_peer: 192.168.1.1
     PERMIT, flags={origin_is_acl,transport_parent,}
    #pkts encaps: 193, #pkts encrypt: 193, #pkts digest 193
    #pkts decaps: 192, #pkts decrypt: 192, #pkts verify 192
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
    #pkts no sa (send) 12, #pkts invalid sa (rcv) 0
    #pkts encaps failed (send) 0, #pkts decaps failed (rcv) 0
    #pkts invalid prot (recv) 0, #pkts verify failed: 0
    #pkts invalid identity (recv) 0, #pkts invalid len (rcv) 0
    #pkts replay rollover (send): 0, #pkts replay rollover (rcv) 0
    ##pkts replay failed (rcv): 0
    #pkts internal err (send): 0, #pkts internal err (recv) 0

     local crypto endpt.: 192.168.2.1, remote crypto endpt.: 192.168.1.1
     path mtu 1514, media mtu 1514
     current outbound spi: 1FA721CA

     inbound esp sas:
      spi: 0xEE52531(249898289)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4607961/2789)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0xFEE24F3(267265267)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2002, flow_id: 3, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2817)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x19240817(421791767)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2004, flow_id: 5, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2750)
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x1FA721CA(531046858)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4607972/2789)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x12B10EB0(313593520)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2003, flow_id: 4, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2817)
        IV size: 8 bytes
        replay detection support: Y
      spi: 0x1A700242(443548226)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2005, flow_id: 6, crypto map: GRE
        sa timing: remaining key lifetime (k/sec): (4608000/2750)
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:


   local  ident (addr/mask/prot/port): (192.168.2.1/255.255.255.255/0/0)
   remote ident (addr/mask/prot/port): (192.168.1.1/255.255.255.255/0/0)
   current_peer: 192.168.1.1
     PERMIT, flags={transport_parent,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
    #pkts no sa (send) 0, #pkts invalid sa (rcv) 0
    #pkts encaps failed (send) 0, #pkts decaps failed (rcv) 0
    #pkts invalid prot (recv) 0, #pkts verify failed: 0
    #pkts invalid identity (recv) 0, #pkts invalid len (rcv) 0
    #pkts replay rollover (send): 0, #pkts replay rollover (rcv) 0
    ##pkts replay failed (rcv): 0
    #pkts internal err (send): 0, #pkts internal err (recv) 0

     local crypto endpt.: 192.168.2.1, remote crypto endpt.: 192.168.1.1
     path mtu 1514, media mtu 1514
     current outbound spi: 0

     inbound esp sas:

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:

     outbound ah sas:

     outbound pcp sas:

故障排除

本部分提供的信息可用于对配置进行故障排除。

故障排除命令

命令输出解释程序工具仅限注册用户)支持某些 show 命令,使用此工具可以查看对 show 命令输出的分析。

注意: 在发出 debug 命令之前,请参阅有关 debug 命令的重要信息

  • debug crypto isakmp -显示在阶段1期间的错误。

  • debug crypto ipsec -显示在阶段2期间的错误。

  • debug crypto engine - 显示来自加密引擎的信息。

  • debug ip your routing protocol - 显示与路由协议的路由事务相关的信息。

  • clear crypto connection connection-id [slot|rsm|VIP] - 终止当前正在进行的加密会话。当会话超时时,加密会话通常会终止。使用 show crypto cisco connections 命令可获得连接 ID 值。

  • clear crypto isakmp - 清除第 1 阶段的安全连接。

  • clear crypto sa - 清除第 2 阶段的安全连接。


相关信息


Document ID: 14136