第二阶段协商不起来

可参考如下案例检查下配置：

客户现场有多个分支，为了实现总部与分支之间互通，且要确保数据传递的安全性，总部分支之间需要使用ipsec对数据进行加密。由于存在多个分支，为了实现总部配置的简洁性，总部采用模板方式。用设备的loopback地址模拟内网PC。

第 1 步：总部路由器配置

#

 ike proposal 1   //配置ike  proposal

 encryption-algorithm 3des-cbc

 dh group2

authentication-algorithm md5

 #

#

ike keychain 1  //创建ike keychain，匹配分支1地址

pre-shared-key address 10.88.142.120 255.255.255.255 key simple 123

#

ike keychain 2  //创建ike keychain，匹配分支2地址

 pre-shared-key address 10.88.142.121 255.255.255.255 key  simple 123

#

ike profile 1  //创建ike proflle，关联keychain 1

 keychain 1

 local-identity address 10.153.42.93

 match remote identity address 10.88.142.120 255.255.255.255

 proposal 1

#

ike profile 2   //创建ike proflle，关联keychain 2

 keychain 2

 local-identity address 10.153.42.93

 match remote identity address 10.88.142.121 255.255.255.255

 proposal 1

#

ipsec transform-set 1    //配置ipsec安全提议

 encapsulation-mode tunnel

 transform esp

 esp authentication-algorithm md5

 esp encryption-algorithm 3des

# 

ipsec policy-template fz 1  //创建分支模板1

 transform-set 1

 local-address 10.153.42.93

 remote-address 10.88.142.120

 ike-profile 1

#

ipsec policy-template fz 2  //创建分支模板2

 transform-set 1

 local-address 10.153.42.93

 remote-address 10.88.142.121

 ike-profile 2

##

ipsec policy aaa 1 isakmp template  fz   //创建ipsec策略模板

#

interface LoopBack0   //配置测试地址

 ip address 1.1.1.1  255.255.255.255

#

interface GigabitEthernet0/0

 port link-mode route

 combo enable copper

 ip address 10.153.42.93 255.255.255.0

 ipsec apply policy aaa

#

第 2 步：分支1（V7）路由器配置

#

acl advanced 3210   //创建ipsec感兴趣流

 rule 0 permit ip source 3.3.3.3  0 destination 1.1.1.1 0

#

#

ike keychain 2   //创建ike keychain，指向总部ip地址

 pre-shared-key address 10.153.42.93 255.255.255.255 key simple 123

#

ike proposal 1   //创建ike proposal

 encryption-algorithm 3des-cbc

 dh group2

 authentication-algorithm md5

#

ike profile 1   //创建ike profile，关联ike keychain和proposal

 keychain 1

 local-identity address 10.88.142.121  //指本端地址用local-identity address，不要使用match local address

 match remote identity address 10.153.42.93 255.255.255.255

 proposal 1

#

ipsec transform-set 1   //创建ipsec安全提议

 esp encryption-algorithm 3des-cbc

 esp authentication-algorithm md5

#

ipsec policy aaa 1 isakmp     //创建ipsec策略

 transform-set 1

 security acl 3210

 local-address 10.88.142.121

 remote-address 10.153.42.93

 ike-profile 1

#

interface LoopBack0   //配置测试地址

 ip address  3.3.3.3  255.255.255.255

#

interface GigabitEthernet2/0/0   //公网口下发ipsec策略

ip address 10.88.142.121 255.255.255.0

 ipsec apply policy aaa

#

第 3 步：分支2（V5）路由器配置

#

acl number 3210   //配置ipsec感兴趣流

 rule 0 permit ip source 2.2.2.2  0 destination 1.1.1.1 0

#

ike proposal 1   //配置ipsec proposal

 encryption-algorithm 3des-cbc

 dh group2

 authentication-algorithm md5

#

ike peer 1     //配置ike 对等体

 proposal 1

 pre-shared-key simple 123

 remote-address 10.153.42.93

#

ipsec transform-set 1   //配置ipsec安全提议

 encapsulation-mode tunnel

 transform esp

 esp authentication-algorithm md5

 esp encryption-algorithm 3des

#

ipsec policy aaa 1 isakmp   //配置ipsec策略

 security acl 3210

 ike-peer 1

 transform-set 1

#

interface LoopBack0   //配置测试地址

 ip address 2.2.2.2  255.255.255.255

#

interface GigabitEthernet3/0/0    //公网口下发ipsec策略

 port link-mode route

 ip address 10.88.142.120  255.255.255.0

 ipsec policy aaa

#

第 4 步：分支1与总部互通测试

<FZ1>ping -a 3.3.3.3 2.2.2.2

Ping 2.2.2.2 (2.2.2.2) from 3.3.3.3: 56 data bytes, press CTRL_C to break

56 bytes from 2.2.2.2: icmp_seq=0 ttl=255 time=0.290 ms

56 bytes from 2.2.2.2: icmp_seq=1 ttl=255 time=0.170 ms

56 bytes from 2.2.2.2: icmp_seq=2 ttl=255 time=0.182 ms

56 bytes from 2.2.2.2: icmp_seq=3 ttl=255 time=0.144 ms

56 bytes from 2.2.2.2: icmp_seq=4 ttl=255 time=0.140 ms

--- Ping statistics for 2.2.2.2 ---

5 packets transmitted, 5 packets received, 0.0% packet loss

round-trip min/avg/max/std-dev = 0.140/0.185/0.290/0.055 ms

[FZ1]dis ike sa

    Connection-ID   Remote                Flag         DOI   

------------------------------------------------------------------

    24              10.153.42.93          RD           IPsec 

Flags:

RD--READY RL--REPLACED FD-FADING

<FZ1>dis ipsec sa

-------------------------------

Interface: GigabitEthernet2/0/0

-------------------------------

  -----------------------------

  IPsec policy: aaa

  Sequence number: 2

  Mode: ISAKMP

  -----------------------------

    Tunnel id: 0

    Encapsulation mode: tunnel

    Perfect Forward Secrecy:

    Inside VPN:

    Extended Sequence Numbers enable: N

    Traffic Flow Confidentiality enable: N

    Path MTU: 1444

    Tunnel:

        local  address: 10.88.142.121

        remote address: 10.153.42.93

    Flow:

        sour addr: 3.3.3.3/255.255.255.255  port: 0  protocol: ip

        dest addr: 1.1.1.1/255.255.255.255  port: 0  protocol: ip

    [Inbound ESP SAs]

      SPI: 3934162279 (0xea7e8d67)

      Connection ID: 115964116993

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/2397

      Max received sequence-number: 4

      Anti-replay check enable: Y

      Anti-replay window size: 64

      UDP encapsulation used for NAT traversal: N

      Status: Active

    [Outbound ESP SAs]

      SPI: 2922365795 (0xae2fc363)

      Connection ID: 158913789952

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/2397

      Max sent sequence-number: 4

      UDP encapsulation used for NAT traversal: N

      Status: Active

第 5 步：分支2与总部互通测试

<FZ2> PING 1.1.1.1: 56  data bytes, press CTRL_C to break

    Request time out

    Reply from 1.1.1.1: bytes=56 Sequence=1 ttl=255 time=35 ms

    Reply from 1.1.1.1: bytes=56 Sequence=2 ttl=255 time=47 ms

    Reply from 1.1.1.1: bytes=56 Sequence=3 ttl=255 time=35 ms

    Reply from 1.1.1.1: bytes=56 Sequence=4 ttl=255 time=35 ms

  --- 1.1.1.1 ping statistics ---

    5 packet(s) transmitted

    4 packet(s) received

    20.00% packet loss

    round-trip min/avg/max = 35/38/47 ms

<FZ2X>dis ike sa

    total phase-1 SAs:  1

    connection-id  peer                    flag        phase   doi

  ----------------------------------------------------------------

     7             10.153.42.93            RD|ST       1       IPSEC

     8             10.153.42.93            RD|ST       2       IPSEC

  flag meaning

  RD--READY ST--STAYALIVE RL--REPLACED FD--FADING TO--TIMEOUT RK—REKEY

<FZ2>dis ipsec sa

===============================

Interface: GigabitEthernet3/0/0

    path MTU: 1500

===============================

  -----------------------------

  IPsec policy name: "aaa"

  sequence number: 1

  acl version: ACL4

  mode: isakmp

  -----------------------------

    PFS: N, DH group: none

    tunnel:

        local  address: 10.88.142.120

        remote address: 10.153.42.93

    flow:

        sour addr: 2.2.2.2/255.255.255.255  port: 0  protocol: IP

        dest addr: 1.1.1.1/255.255.255.255  port: 0  protocol: IP

    [inbound ESP SAs]

      spi: 0x1FFC45F4(536626676)

      transform: ESP-ENCRYPT-3DES ESP-AUTH-MD5

      in use setting: Tunnel

      connection id: 7

      sa duration (kilobytes/sec): 1843200/3600

      sa remaining duration (kilobytes/sec): 1843199/3560

      anti-replay detection: Enabled

        anti-replay window size(counter based): 32

      udp encapsulation used for nat traversal: N

    [outbound ESP SAs]

      spi: 0x201F0CBD(538905789)

      transform: ESP-ENCRYPT-3DES ESP-AUTH-MD5

      in use setting: Tunnel

      connection id: 8

      sa duration (kilobytes/sec): 1843200/3600

      sa remaining duration (kilobytes/sec): 1843199/3560

      anti-replay detection: Enabled

        anti-replay window size(counter based): 32

      udp encapsulation used for nat traversal: N

第 6 步：总部ike及ipsec sa建立情况

<H3C>dis ike sa

    Connection-ID   Remote                Flag         DOI   

------------------------------------------------------------------

    45              10.88.142.120         RD           IPsec 

    44              10.88.142.121         RD           IPsec 

Flags:

RD--READY RL--REPLACED FD-FADING

<H3C>dis ipsec sa

-------------------------------

Interface: GigabitEthernet0/0

-------------------------------

  -----------------------------

  IPsec policy: aaa

  Sequence number: 1

  Mode: Template

  -----------------------------

    Tunnel id: 1

    Encapsulation mode: tunnel

    Perfect Forward Secrecy:

    Inside VPN:

    Extended Sequence Numbers enable: N

    Traffic Flow Confidentiality enable: N

    Path MTU: 1444

    Tunnel:

        local  address: 10.153.42.93

        remote address: 10.88.142.120

    Flow:

        sour addr: 1.1.1.1/255.255.255.255  port: 0  protocol: ip

        dest addr: 2.2.2.2/255.255.255.255  port: 0  protocol: ip

    [Inbound ESP SAs]

      SPI: 538905789 (0x201f0cbd)

      Connection ID: 55834574850

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/3435

      Max received sequence-number: 4

      Anti-replay check enable: Y

      Anti-replay window size: 64

      UDP encapsulation used for NAT traversal: N

      Status: Active

    [Outbound ESP SAs]

      SPI: 536626676 (0x1ffc45f4)

      Connection ID: 47244640259

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/3435

      Max sent sequence-number: 4

      UDP encapsulation used for NAT traversal: N

      Status: Active

  -----------------------------

  IPsec policy: aaa

  Sequence number: 1

  Mode: Template

  -----------------------------

    Tunnel id: 0

    Encapsulation mode: tunnel

    Perfect Forward Secrecy:

    Inside VPN:

    Extended Sequence Numbers enable: N

    Traffic Flow Confidentiality enable: N

    Path MTU: 1444

    Tunnel:

        local  address: 10.153.42.93

        remote address: 10.88.142.121

    Flow:

        sour addr: 1.1.1.1/255.255.255.255  port: 0  protocol: ip

        dest addr: 3.3.3.3/255.255.255.255  port: 0  protocol: ip

    [Inbound ESP SAs]

      SPI: 2922365795 (0xae2fc363)

      Connection ID: 73014444033

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/2146

      Max received sequence-number: 4

      Anti-replay check enable: Y

      Anti-replay window size: 64

      UDP encapsulation used for NAT traversal: N

      Status: Active

    [Outbound ESP SAs]

      SPI: 3934162279 (0xea7e8d67)

      Connection ID: 73014444032

      Transform set: ESP-ENCRYPT-3DES-CBC ESP-AUTH-MD5

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843199/2146

      Max sent sequence-number: 4

      UDP encapsulation used for NAT traversal: N

      Status: Active