使用AES加密配置IOS到IOS 的IPSec

The information in this document was created from the devices in a specific lab environment.All of the devices used in this document started with a cleared (default) configuration.If your network is live, make sure that you understand the potential impact of any command.

Conventions

有关文档规则的详细信息，请参阅 Cisco 技术提示规则。

Configure

本部分提供有关如何配置本文档所述功能的信息。

Note: 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）。

配置

本文档使用此处所示的配置。

路由器 1721-A
路由器 1721-B

路由器 1721-A
R-1721-A#show run Building configuration... Current configuration : 1706 bytes ! ! Last configuration change at 00:46:32 UTC Fri Sep 10 2004 ! NVRAM config last updated at 00:45:48 UTC Fri Sep 10 2004 ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R-1721-A ! boot-start-marker boot-end-marker ! ! memory-size iomem 15 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 no aaa new-model ip subnet-zero ip cef ! ! ! ip audit po max-events 100 no ip domain lookup no ftp-server write-enable ! ! ! ! !--- Define Internet Key Exchange (IKE) policy. crypto isakmp policy 10 !--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy. encr aes 256 !--- Specify that pre-shared key authentication is used. authentication pre-share !--- Specify the shared secret. crypto isakmp key cisco123 address 10.48.66.146 ! ! !--- Define the IPSec transform set. crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac ! !--- Define crypto map entry name "aesmap" that will use !--- IKE to establish the security associations (SA). crypto map aesmap 10 ipsec-isakmp !--- Specify remote IPSec peer. set peer 10.48.66.146 !--- Specify which transform sets !--- are allowed for this crypto map entry. set transform-set aesset !--- Name the access list that determines which traffic !--- should be protected by IPSec. match address acl_vpn ! ! ! interface ATM0 no ip address shutdown no atm ilmi-keepalive dsl equipment-type CPE dsl operating-mode GSHDSL symmetric annex A dsl linerate AUTO ! interface Ethernet0 ip address 192.168.100.1 255.255.255.0 ip nat inside half-duplex ! interface FastEthernet0 ip address 10.48.66.147 255.255.254.0 ip nat outside speed auto !--- Apply crypto map to the interface. crypto map aesmap ! ip nat inside source list acl_nat interface FastEthernet0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.48.66.1 ip route 192.168.200.0 255.255.255.0 FastEthernet0 no ip http server no ip http secure-server ! ip access-list extended acl_nat !--- Exclude protected traffic from being NAT'ed. deny ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 permit ip 192.168.100.0 0.0.0.255 any !--- Access list that defines traffic protected by IPSec. ip access-list extended acl_vpn permit ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 ! end R-1721-A#

路由器 1721-A

R-1721-A#show run
Building configuration...

Current configuration : 1706 bytes
!
! Last configuration change at 00:46:32 UTC Fri Sep 10 2004
! NVRAM config last updated at 00:45:48 UTC Fri Sep 10 2004
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R-1721-A
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 15
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
ip audit po max-events 100
no ip domain lookup
no ftp-server write-enable
!
!
!
!

!--- Define Internet Key Exchange (IKE) policy.

crypto isakmp policy 10

!--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy.

encr aes 256

!--- Specify that pre-shared key authentication is used.

authentication pre-share

!--- Specify the shared secret.

crypto isakmp key cisco123 address 10.48.66.146
!
!

!--- Define the IPSec transform set.

crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac
!

!--- Define crypto map entry name "aesmap" that will use !--- IKE to establish the security associations (SA).

crypto map aesmap 10 ipsec-isakmp

!--- Specify remote IPSec peer.

set peer 10.48.66.146

!--- Specify which transform sets !--- are allowed for this crypto map entry.

set transform-set aesset

!--- Name the access list that determines which traffic !--- should be protected by IPSec.

match address acl_vpn
!
!
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
dsl equipment-type CPE
dsl operating-mode GSHDSL symmetric annex A
dsl linerate AUTO
!
interface Ethernet0
ip address 192.168.100.1 255.255.255.0
ip nat inside
half-duplex
!
interface FastEthernet0
ip address 10.48.66.147 255.255.254.0
ip nat outside
speed auto

!--- Apply crypto map to the interface.

crypto map aesmap
!
ip nat inside source list acl_nat interface FastEthernet0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 10.48.66.1
ip route 192.168.200.0 255.255.255.0 FastEthernet0
no ip http server
no ip http secure-server
!

ip access-list extended acl_nat

!--- Exclude protected traffic from being NAT'ed.

deny ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255
permit ip 192.168.100.0 0.0.0.255 any

!--- Access list that defines traffic protected by IPSec.

ip access-list extended acl_vpn
permit ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
!
end

R-1721-A#

路由器 1721-B
R-1721-B#show run Building configuration... Current configuration : 1492 bytes ! ! Last configuration change at 14:11:41 UTC Wed Sep 8 2004 ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R-1721-B ! boot-start-marker boot-end-marker ! ! memory-size iomem 15 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 no aaa new-model ip subnet-zero ip cef ! ! ! ip audit po max-events 100 no ip domain lookup no ftp-server write-enable ! ! ! ! ! !--- Define IKE policy. crypto isakmp policy 10 !--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy. encr aes 256 !--- Specify that pre-shared key authentication is used. authentication pre-share !--- Specify the shared secret. crypto isakmp key cisco123 address 10.48.66.147 ! ! !--- Define the IPSec transform set. crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac ! !--- Define crypto map entry name "aesmap" that uses !--- IKE to establish the SA. crypto map aesmap 10 ipsec-isakmp !--- Specify remote IPSec peer. set peer 10.48.66.147 !--- Specify which transform sets !--- are allowed for this crypto map entry. set transform-set aesset !--- Name the access list that determines which traffic !--- should be protected by IPSec. match address acl_vpn ! ! ! interface Ethernet0 ip address 192.168.200.1 255.255.255.0 ip nat inside half-duplex ! interface FastEthernet0 ip address 10.48.66.146 255.255.254.0 ip nat outside speed auto !--- Apply crypto map to the interface. crypto map aesmap ! ip nat inside source list acl_nat interface FastEthernet0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.48.66.1 ip route 192.168.100.0 255.255.255.0 FastEthernet0 no ip http server no ip http secure-server ! ip access-list extended acl_nat !--- Exclude protected traffic from being NAT'ed. deny ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 permit ip 192.168.200.0 0.0.0.255 any !--- Access list that defines traffic protected by IPSec. ip access-list extended acl_vpn permit ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 ! end R-1721-B#

路由器 1721-B

R-1721-B#show run
Building configuration...

Current configuration : 1492 bytes
!
! Last configuration change at 14:11:41 UTC Wed Sep 8 2004
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R-1721-B
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 15
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
ip audit po max-events 100
no ip domain lookup
no ftp-server write-enable
!
!
!
! 
!

!--- Define IKE policy.

crypto isakmp policy 10

!--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy.

 encr aes 256

!--- Specify that pre-shared key authentication is used.

 authentication pre-share


!--- Specify the shared secret.

crypto isakmp key cisco123 address 10.48.66.147
!
!

!--- Define the IPSec transform set.

crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac 
!

!--- Define crypto map entry name "aesmap" that uses !--- IKE to establish the SA.

crypto map aesmap 10 ipsec-isakmp 

!--- Specify remote IPSec peer.

 set peer 10.48.66.147

!--- Specify which transform sets !--- are allowed for this crypto map entry.

 set transform-set aesset 

!--- Name the access list that determines which traffic !--- should be protected by IPSec.

 match address acl_vpn
!
!
!
interface Ethernet0
 ip address 192.168.200.1 255.255.255.0
 ip nat inside
 half-duplex
!
interface FastEthernet0
 ip address 10.48.66.146 255.255.254.0
 ip nat outside
 speed auto

!--- Apply crypto map to the interface.

 crypto map aesmap
!
ip nat inside source list acl_nat interface FastEthernet0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 10.48.66.1
ip route 192.168.100.0 255.255.255.0 FastEthernet0
no ip http server
no ip http secure-server
!
ip access-list extended acl_nat

!--- Exclude protected traffic from being NAT'ed.

 deny   ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255
 permit ip 192.168.200.0 0.0.0.255 any



!--- Access list that defines traffic protected by IPSec.

ip access-list extended acl_vpn
 permit ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255
!
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
!
end

R-1721-B#

Verify

本部分所提供的信息可用于确认您的配置是否正常工作。

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 isakmp sa —显示互联网安全协会和密钥管理协议(ISAKMP)的SA状态。

路由器 1721-A
R-1721-A#show crypto isakmp sa dst src state conn-id slot 10.48.66.147 10.48.66.146 QM_IDLE 1 0

路由器 1721-B
R-1721-B#show crypto isakmp sa dst src state conn-id slot 10.48.66.147 10.48.66.146 QM_IDLE 1 0

show crypto ipsec sa - 显示有关活动隧道的统计数据。

路由器 1721-A
R-1721-A#show crypto ipsec sa interface: FastEthernet0 Crypto map tag: aesmap, local addr. 10.48.66.147 protected vrf: local ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0) remote ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0) current_peer: 10.48.66.146:500 PERMIT, flags={origin_is_acl,} #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30 #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30 #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.: 10.48.66.147, remote crypto endpt.: 10.48.66.146 path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0 current outbound spi: 2EB0BA1A inbound esp sas: spi: 0xFECA28BC(4274661564) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4554237/2895) IV size: 16 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0x2EB0BA1A(783333914) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4554237/2894) IV size: 16 bytes replay detection support: Y outbound ah sas: outbound pcp sas: R-1721-A#

路由器 1721-A

R-1721-A#show crypto ipsec sa

interface: FastEthernet0
    Crypto map tag: aesmap, local addr. 10.48.66.147

   protected vrf: 
   local  ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0)
   current_peer: 10.48.66.146:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30
    #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30
    #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.: 10.48.66.147, remote crypto endpt.: 10.48.66.146
     path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0
     current outbound spi: 2EB0BA1A

     inbound esp sas:
      spi: 0xFECA28BC(4274661564)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap
        sa timing: remaining key lifetime (k/sec): (4554237/2895)
        IV size: 16 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x2EB0BA1A(783333914)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap
        sa timing: remaining key lifetime (k/sec): (4554237/2894)
        IV size: 16 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:
R-1721-A#

路由器 1721-B
R-1721-B#show crypto ipsec sa interface: FastEthernet0 Crypto map tag: aesmap, local addr. 10.48.66.146 protected vrf: local ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0) remote ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0) current_peer: 10.48.66.147:500 PERMIT, flags={origin_is_acl,} #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30 #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts compr. failed: 0 #pkts not decompressed: 0, #pkts decompress failed: 0 #send errors 5, #recv errors 0 local crypto endpt.: 10.48.66.146, remote crypto endpt.: 10.48.66.147 path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0 current outbound spi: FECA28BC inbound esp sas: spi: 0x2EB0BA1A(783333914) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4583188/2762) IV size: 16 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0xFECA28BC(4274661564) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4583188/2761) IV size: 16 bytes replay detection support: Y outbound ah sas: outbound pcp sas: R-1721-B#

路由器 1721-B

R-1721-B#show crypto ipsec sa

interface: FastEthernet0
    Crypto map tag: aesmap, local addr. 10.48.66.146

   protected vrf: 
   local  ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0)
   current_peer: 10.48.66.147:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30
    #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 5, #recv errors 0

     local crypto endpt.: 10.48.66.146, remote crypto endpt.: 10.48.66.147
     path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0
     current outbound spi: FECA28BC

     inbound esp sas:
      spi: 0x2EB0BA1A(783333914)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap
        sa timing: remaining key lifetime (k/sec): (4583188/2762)
        IV size: 16 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xFECA28BC(4274661564)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap
        sa timing: remaining key lifetime (k/sec): (4583188/2761)
        IV size: 16 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:
R-1721-B#

show crypto engine connections active - 按 SA 显示总加密/解密。

路由器 1721-A
R-1721-A#show crypto engine connections active ID Interface IP-Address State Algorithm Encrypt Decrypt 1 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 0 0 2000 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 0 30 2001 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 30 0

路由器 1721-A

R-1721-A#show crypto engine connections active 

  ID Interface       IP-Address      State  Algorithm           Encrypt  Decrypt
   1 FastEthernet0   10.48.66.147    set    HMAC_SHA+AES_256_C        0        0
2000 FastEthernet0   10.48.66.147    set    HMAC_SHA+AES_256_C        0       30
2001 FastEthernet0   10.48.66.147    set    HMAC_SHA+AES_256_C       30        0

路由器 1721-B
R-1721-B#show crypto engine connections active ID Interface IP-Address State Algorithm Encrypt Decrypt 1 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 0 0 2000 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 0 30 2001 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 30 0

路由器 1721-B

R-1721-B#show crypto engine connections active 

  ID Interface       IP-Address      State  Algorithm           Encrypt  Decrypt
   1 FastEthernet0   10.48.66.146    set    HMAC_SHA+AES_256_C        0        0
2000 FastEthernet0   10.48.66.146    set    HMAC_SHA+AES_256_C        0       30
2001 FastEthernet0   10.48.66.146    set    HMAC_SHA+AES_256_C       30        0

Troubleshoot

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

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

debug crypto ipsec — 显示 IPSec 事件。
debug crypto isakmp — 显示关于 IKE 事件的消息。
debug crypto engine - 显示来自加密引擎的信息。

有关 IPsec 故障排除的其他信息，请参阅 IP 安全故障排除 - 了解和使用 debug 命令。

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Contents

Introduction

Prerequisites

Requirements

Components Used

Conventions

Configure

配置

Verify

Troubleshoot

故障排除命令

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使用AES加密配置IOS到IOS 的IPSec

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