带重叠场景的ASA VPN配置示例

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已更新: 2017 年 5 月 23 日
文档 ID:211275

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简介

本文档介绍在重叠场景中转换通过LAN到LAN(L2L)IPsec隧道在两个自适应安全设备(ASA)之间传输的VPN流量的步骤，以及转换互联网流量的端口地址转换(PAT)的步骤。

先决条件

要求

在继续本配置示例之前，请确保您已在接口上对 Cisco 自适应安全设备进行了 IP 地址配置并具备基本的连接。

使用的组件

本文档中的信息基于以下软件版本：

  • 思科自适应安全设备软件版本8.3及更高版本。

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。

背景信息

每台设备后面都有一个受保护的专用网络。在重叠场景中，VPN之间的通信永远不会发生，因为数据包从不离开本地子网，因为流量被发送到同一子网的IP地址。这可以通过网络地址转换(NAT)来实现，如以下各节所述。

两个VPN终端上的转换 

当受VPN保护的网络重叠且可以在两个终端上修改配置时；当转到远程转换的子网时，NAT可用于将本地网络转换为不同的子网。

ASA 1

为正在使用的子网创建必要的对象

object network LOCAL
 subnet 192.168.1.0 255.255.255.0
object network XLATED-LOCAL
 subnet 192.168.2.0 255.255.255.0
object network XLATED-REMOTE
 subnet 192.168.3.0 255.255.255.0

配置NAT语句

创建手动语句，仅在转到远程子网（也已转换）时将本地网络转换为不同的子网

nat (inside,outside) source static LOCAL XLATED-LOCAL destination static XLATED-REMOTE XLATED-REMOTE

使用转换后的子网配置加密ACL

access-list VPN-TRAFFIC extended permit ip object XLATED-LOCAL object XLATED-REMOTE Rele

相关加密配置

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.2.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.2.1 type ipsec-l2l
tunnel-group 172.16.2.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

ASA 2

为正在使用的子网创建必要的对象

object network LOCAL
 subnet 192.168.1.0 255.255.255.0
object network XLATED-LOCAL
 subnet 192.168.3.0 255.255.255.0
object network XLATED-REMOTE
 subnet 192.168.2.0 255.255.255.0

配置NAT语句

创建手动语句，仅在转到远程子网（也已转换）时将本地网络转换为不同的子网

nat (inside,outside) source static LOCAL XLATED-LOCAL destination static XLATED-REMOTE XLATED-REMOTE

使用转换后的子网配置加密ACL

access-list VPN-TRAFFIC extended permit ip object XLATED-LOCAL object XLATED-REMOTE Rele

相关加密配置

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.1.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.1.1 type ipsec-l2l
tunnel-group 172.16.1.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

验证

使用本部分可确认配置能否正常运行。

ASA 1

ASA1(config)# sh cry isa sa

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.2.1
    Type    : L2L             Role    : initiator 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs
ASA1(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.1.1

      access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 192.168.3.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.3.0/255.255.255.0/0/0)
      current_peer: 172.16.2.1


      #pkts encaps: 9, #pkts encrypt: 9, #pkts digest: 9
      #pkts decaps: 9, #pkts decrypt: 9, #pkts verify: 9
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #pkts comp failed: 0, #pkts decomp failed: 0
      #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.2.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: F90C149A
      current inbound spi : 6CE656C7

    inbound esp sas:
      spi: 0x6CE656C7 (1827034823)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 16384, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28768)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0xF90C149A (4178318490)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 16384, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28768)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

ASA 2

ASA2(config)# show crypto isa sa 

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.1.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs
ASA2(config)# show crypto ipsec sa 
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.2.1

      access-list VPN-TRAFFIC extended permit ip 192.168.3.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.3.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.1.1


      #pkts encaps: 9, #pkts encrypt: 9, #pkts digest: 9
      #pkts decaps: 9, #pkts decrypt: 9, #pkts verify: 9
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #pkts comp failed: 0, #pkts decomp failed: 0
      #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.2.1/0, remote crypto endpt.: 172.16.1.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 6CE656C7
      current inbound spi : F90C149A

    inbound esp sas:
      spi: 0xF90C149A (4178318490)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28684)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x6CE656C7 (1827034823)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28683)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

具有重叠辐条的中心辐射型拓扑

在以下拓扑中，两个辐条具有相同的子网，需要通过IPsec隧道保护到集线器。为便于对辐条进行管理，NAT配置可解决重叠问题，仅在集线器上执行。 

ASA1

为正在使用的子网创建必要的对象

object network LOCAL
 subnet 10.10.10.0 255.255.255.0
object network SPOKES-NETWORK
 subnet 192.168.2.0 255.255.255.0
object network LOCAL-XLATE-TO-SPOKE1
 subnet 10.20.20.0 255.255.255.0
object network LOCAL-XLATE-TO-SPOKE2
 subnet 10.30.30.0 255.255.255.0
object network REMOTE-XLATE-SPOKE1
 subnet 192.168.3.0 255.255.255.0
object network REMOTE-XLATE-SPOKE2
 subnet 192.168.4.0 255.255.255.0

创建手动语句以转换：

  • 转到SPOKE1(192.168.2.0 /24)时，本地网络10.10.10.0 /24到10.20.20.0 /24。
  • SPOKE1网络192.168.2.0 /24到192.168.3.0 /24（即10.20.20.0 /24）。
  • 转到SPOKE3(192.168.2.0 /24)时，本地网络10.10.0 /24到10.30.30.0 /24。
  • SPOKE2网络192.168.2.0 /24到192.168.4.0 /24（即10.30.30.0 /24）。
nat (inside,outside) source static LOCAL LOCAL-XLATE-SPOKE1 destination static REMOTE-XLATE-SPOKE1 SPOKES-NETWORK
nat (inside,outside) source static LOCAL LOCAL-XLATE-SPOKE2 destination static REMOTE-XLATE-SPOKE2 SPOKES-NETWORK

使用转换后的子网配置加密ACL

access-list VPN-to-SPOKE1 extended permit ip object LOCAL-XLATE-SPOKE1 object SPOKES-NETWORKS
access-list VPN-to-SPOKE2 extended permit ip object LOCAL-XLATE-SPOKE2 object SPOKES-NETWORKS

相关加密配置

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-to-SPOKE1
crypto map MYMAP 10 set peer 172.16.2.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP 20 match address VPN-to-SPOKE2
crypto map MYMAP 20 set peer 172.16.3.1 
crypto map MYMAP 20 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.2.1 type ipsec-l2l
tunnel-group 172.16.2.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK
tunnel-group 172.16.3.1 type ipsec-l2l
tunnel-group 172.16.3.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

ASA2(SPOKE1)

配置转到已转换子网(10.20.20.0 /24)的加密ACL

access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 10.20.20.0 255.255.255.0

相关加密配置

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.1.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.1.1 type ipsec-l2l
tunnel-group 172.16.1.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

R1(SPOKE2)

配置转到已转换子网(10.30.30.0 /24)的加密ACL

ip access-list extended VPN-TRAFFIC
 permit ip 192.168.2.0 0.0.0.255 10.30.30.0 0.0.0.255

相关加密配置

crypto isakmp policy 1
 encr aes 256
 authentication pre-share
 group 2  

crypto isakmp key secure_PSK address 172.16.1.1     
      
crypto ipsec transform-set AES256-SHA esp-aes 256 esp-sha-hmac 
 mode tunnel

crypto map MYMAP 10 ipsec-isakmp 
 set peer 172.16.1.1
 set transform-set AES256-SHA 
 match address VPN-TRAFFIC

interface GigabitEthernet0/1
 ip address 172.16.3.1 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
 crypto map MYMAP

验证

ASA 1

ASA1(config)# show crypto isakmp sa 

IKEv1 SAs:

   Active SA: 2
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 2

1   IKE Peer: 172.16.3.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 
2   IKE Peer: 172.16.2.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs
ASA1(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.1.1

      access-list VPN-to-SPOKE1 extended permit ip 10.20.20.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (10.20.20.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.2.1


      #pkts encaps: 10, #pkts encrypt: 9, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 9, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #pkts comp failed: 0, #pkts decomp failed: 0
      #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.2.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 79384296
      current inbound spi : 2189BF7A

    inbound esp sas:
      spi: 0x2189BF7A (562675578)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28618)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x79384296 (2033730198)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28618)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

    Crypto map tag: MYMAP, seq num: 20, local addr: 172.16.1.1

      access-list VPN-to-SPOKE2 extended permit ip 10.30.30.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (10.30.30.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.3.1


      #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 4, #pkts comp failed: 0, #pkts decomp failed: 0
      #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.3.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 65FDF4F5
      current inbound spi : 05B7155D

    inbound esp sas:
      spi: 0x05B7155D (95884637)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/2883)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x0000001F
    outbound esp sas:
      spi: 0x65FDF4F5 (1711142133)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/2883)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

ASA2(SPOKE1)

ASA2(config)# show crypto isakmp sa 

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.1.1
    Type    : L2L             Role    : initiator 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs
ASA2(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.2.1

      access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 10.20.20.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (10.20.20.0/255.255.255.0/0/0)
      current_peer: 172.16.1.1


      #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #pkts comp failed: 0, #pkts decomp failed: 0
      #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.2.1/0, remote crypto endpt.: 172.16.1.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 2189BF7A
      current inbound spi : 79384296

    inbound esp sas:
      spi: 0x79384296 (2033730198)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28494)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x2189BF7A (562675578)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28494)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

R1(SPOKE2)

R31show crypto isakmp sa
IPv4 Crypto ISAKMP SA
dst             src             state          conn-id status
172.16.1.1      172.16.3.1      QM_IDLE           1001 ACTIVE

IPv6 Crypto ISAKMP SA
R1#show crypto ipsec sa

interface: GigabitEthernet0/1
    Crypto map tag: MYMAP, local addr 172.16.3.1

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (10.30.30.0/255.255.255.0/0/0)
   current_peer 172.16.1.1 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
    #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
    #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.: 172.16.3.1, remote crypto endpt.: 172.16.1.1
     plaintext mtu 1438, path mtu 1500, ip mtu 1500, ip mtu idb GigabitEthernet0/1
     current outbound spi: 0x5B7155D(95884637)
     PFS (Y/N): N, DH group: none

     inbound esp sas:
      spi: 0x65FDF4F5(1711142133)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 1, flow_id: SW:1, sibling_flags 80004040, crypto map: MYMAP
        sa timing: remaining key lifetime (k/sec): (4188495/2652)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x5B7155D(95884637)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 2, flow_id: SW:2, sibling_flags 80004040, crypto map: MYMAP
        sa timing: remaining key lifetime (k/sec): (4188495/2652)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     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。

清除安全关联

排除故障时，请务必在进行更改后清除现有的 SA。在 PIX 的特权模式下，使用以下命令：

  • clear crypto ipsec sa - 删除活动的 IPsec SA。

  • clear crypto isakmp sa - 删除活动的 IKE SA。

查看NAT配置

  • show nat detail — 显示对象/对象组已展开的NAT配置

故障排除命令

使用本部分可确认配置能否正常运行。

思科 CLI 分析器（仅适用于注册客户）支持某些 show 命令。要查看对 show 命令输出的分析，请使用思科 CLI 分析器。

注意：使用 debug 命令之前，请参阅有关 debug 命令的重要信息和 IP 安全故障排除 - 了解和使用 debug 命令。

  

  • debug crypto ipsec - 显示第 2 阶段的 IPsec 协商。

  • debug crypto isakmp - 显示第 1 阶段的 ISAKMP 协商。

相关信息

TAC Authored

由思科工程师提供

  • Gustavo Medina

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