重疊情況下 ASA VPN 的組態範例

下載選項

  • PDF     (639.7 KB)
    在多種裝置上使用 Adobe Reader 檢視
  • ePub     (524.1 KB)
    在 iPhone、iPad、Android、Sony Reader 或 Windows Phone 上的各種應用程式中檢視
  • Mobi (Kindle)     (291.8 KB)
    在 Kindle 裝置或多部裝置的 Kindle 應用程式上檢視
已更新: 2017 年 5 月 23 日
文件 ID:211275

無偏見用語

本產品的文件集力求使用無偏見用語。針對本文件集的目的，無偏見係定義為未根據年齡、身心障礙、性別、種族身分、民族身分、性別傾向、社會經濟地位及交織性表示歧視的用語。由於本產品軟體使用者介面中硬式編碼的語言、根據 RFP 文件使用的語言，或引用第三方產品的語言，因此本文件中可能會出現例外狀況。深入瞭解思科如何使用包容性用語。

關於此翻譯

思科已使用電腦和人工技術翻譯本文件，讓全世界的使用者能夠以自己的語言理解支援內容。請注意，即使是最佳機器翻譯，也不如專業譯者翻譯的內容準確。Cisco Systems, Inc. 對這些翻譯的準確度概不負責，並建議一律查看原始英文文件（提供連結）。

簡介

本文說明在重疊場景中，用於轉換在兩個自適應安全裝置(ASA)之間通過LAN到LAN(L2L)IPsec隧道傳輸的VPN流量的步驟，以及用於網際網路流量的埠地址轉換(PAT)的步驟。

必要條件

需求

在繼續此配置示例之前，請確保已在介面上配置了IP地址且具備基本連線。

採用元件

本檔案中的資訊是根據以下軟體版本：

  • 思科自適應安全裝置軟體版本8.3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。如果您的網路正在作用，請確保您已瞭解任何指令可能造成的影響。

背景資訊

每台裝置後面都有一個受保護的專用網路。在重疊的情況下，由於資料包從未離開本地子網，因此不會通過VPN進行通訊，因為流量被傳送到同一子網的IP地址。這可以通過網路地址轉換(NAT)來完成，如以下各節所述。

兩個VPN終端上的轉換 

當受VPN保護的網路重疊時，可以在兩個終端上修改配置；NAT可用於在轉至遠端轉換子網時將本地網路轉換為不同的子網。

ASA 1

為正在使用的子網建立必要的對象

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語句

建立手動語句，僅在轉到遠端子網時，才能將本地網路轉換為其他子網（也進行了轉換）

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

使用轉換後的子網配置加密ACL

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

相關加密配置

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

為正在使用的子網建立必要的對象

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語句

建立手動語句，僅在轉到遠端子網時，才能將本地網路轉換為其他子網（也進行了轉換）

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

使用轉換後的子網配置加密ACL

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

相關加密配置

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

驗證

使用本節內容，確認您的組態是否正常運作。

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

具有重疊分支的中心輻射型拓撲

在下面的拓撲中，兩個分支具有相同的子網，需要通過IPsec隧道向集線器進行保護。為了便於對分支進行管理，NAT配置用於解決重疊問題僅在集線器上執行。 

ASA1

為正在使用的子網建立必要的對象

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

建立要轉換的手動語句：

  • 當轉到SPOKE1(192.168.2.0 /24)時，本地網路10.10.10.0 /24到10.20.20.0 /24。
  • 進入10.20.20.0 /24時，SPOKE1網路192.168.2.0 /24到192.168.3.0 /24。
  • 當轉到SPOKE3(192.168.2.0 /24)時，本地網路10.10.10.0 /24到10.30.30.0 /24。
  • 進入10.30.30.0 /24時，SPOKE2網路192.168.2.0 /24到192.168.4.0 /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

使用轉換後的子網配置加密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

相關加密配置

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)

配置轉至已轉換子網(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

相關加密配置

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)

配置轉至已轉換子網(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

相關加密配置

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

驗證

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:

疑難排解

本節提供的資訊可用於對組態進行疑難排解。

清除安全關聯

進行故障排除時，請確保在進行更改後清除現有SA。在PIX的特權模式下，使用以下命令：

  • clear crypto ipsec sa — 刪除活動的IPsec SA。

  • clear crypto isakmp sa — 刪除活動的IKE SA。

檢查NAT配置

  • show nat detail — 顯示擴展了對象/對象組的NAT配置

疑難排解指令

使用本節內容，確認您的組態是否正常運作。

Cisco CLI Analyzer（僅供已註冊客戶使用）支援某些 show 指令。使用 Cisco CLI Analyzer 檢視 show 指令輸出的分析。

附註：使用debug指令之前，請先參閱有關Debug指令和IP安全性疑難排解的重要資訊 — 瞭解和使用debug指令。

  

  • debug crypto ipsec — 顯示第2階段的IPsec協商。

  • debug crypto isakmp — 顯示第1階段的ISAKMP協商。

相關資訊

TAC Authored

由思科工程師貢獻

  • Gustavo Medina

這份文件是否有所幫助？

Feedback意見

讓思科協助您

本文件適用於這些產品