一. 测试拓扑

 备注：
A.Branch路由器GNS中用的IOS为c7200-adventerprisek9-mz.152-4.S，下载地址为：http://down.51cto.com/data/607191
B.CenterASA用的是ASA8.42的VMWare虚拟机
二.基本配置
A.Branch路由器
interface FastEthernet0/0
 ip address 202.100.1.1 255.255.255.0
 no shut
interface Loopback0
 ip address 172.16.1.1 255.255.255.0
ip route 0.0.0.0 0.0.0.0 202.100.1.10
B.Internet路由器
interface FastEthernet0/0
 ip address 202.100.1.10 255.255.255.0
 no shut
interface FastEthernet0/1
 ip address 202.100.2.10 255.255.255.0
no shut
C.Center-ASA防火墙
interface GigabitEthernet0
 nameif Outside
 security-level 0
 ip address 202.100.2.1 255.255.255.0
 no shut
interface GigabitEthernet1
 nameif Inside
 security-level 100
 ip address 10.1.1.1 255.255.255.0
 no shut
route Outside 0 0 202.100.2.10
三.L2L IKE2 ×××配置
A.Branch路由器
①配置IKE2 Policy
crypto ikev2 proposal IKEV2-Proposal
 encryption 3des aes-cbc-256
 integrity sha256 sha512
 group 2 5 14
crypto ikev2 policy IKEV2-Policy
 proposal IKEV2-Proposal
②配置IKE2 Profile
crypto ikev2 keyring IKEV2-Keyring
 peer CenterASA
  address 202.100.2.1
  pre-shared-key Pre-Key
crypto ikev2 profile IKEV2-Profile
 match identity remote address 202.100.2.1 255.255.255.255
 identity local address 202.100.1.1
 authentication remote pre-share
 authentication local pre-share
 keyring local IKEV2-Keyring
③配置IPSec transform-set
crypto ipsec transform-set Trans1 esp-des esp-md5-hmac
crypto ipsec transform-set Trans2 esp-3des esp-sha256-hmac
④配置感兴趣流
ip access-list extended ×××-Traffic
 permit ip 172.16.1.0 0.0.0.255 10.1.1.0 0.0.0.255
⑤配置crypto Map并在接口上调用
crypto map Crypto-Map 10 ipsec-isakmp
 set peer 202.100.2.1
 set transform-set Trans1 Trans2
 set ikev2-profile IKEV2-Profile
 match address ×××-Traffic
interface FastEthernet0/0
 crypto map Crypto-Map
B.CenterASA防火墙
①Outside接口激活IKEV2
crypto ikev2 enable Outside
②配置IKE2 Policy
crypto ikev2 policy 10
 encryption aes-256 des
 integrity sha256 sha
 group 2 1
 prf sha256 sha
③配置tunnel group
tunnel-group 202.100.1.1 type ipsec-l2l
tunnel-group 202.100.1.1 ipsec-attributes
 ikev2 remote-authentication pre-shared-key Pre-Key
 ikev2 local-authentication pre-shared-key Pre-Key
④配置IPSec transform-set
crypto ipsec ikev2 ipsec-proposal Transet
 protocol esp encryption aes-192 des
 protocol esp integrity sha-1 md5
⑤配置感兴趣流
access-list ×××-Traffic extended permit ip 10.1.1.0 255.255.255.0 172.16.1.0 255.255.255.0
⑥配置crypto Map并在接口上调用
crypto map Crypto-Map 10 match address ×××-Traffic
crypto map Crypto-Map 10 set peer 202.100.1.1
crypto map Crypto-Map 10 set ikev2 ipsec-proposal Transet
crypto map Crypto-Map interface Outside
四.测试
A.触发×××
Branch#ping 10.1.1.18 source 172.16.1.1     
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.18, timeout is 2 seconds:
Packet sent with a source address of 172.16.1.1

.!!!!
B.在Branch路由器的f0/0接口抓包
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">
 
C.查看加解密
Branch#show crypto engine connections active
Crypto Engine Connections

   ID  Type    Algorithm           Encrypt  Decrypt LastSeqN IP-Address
    1  IPsec   DES+MD5                   9        0        0 202.100.1.1
    2  IPsec   DES+MD5                   0        9        9 202.100.1.1
 1005  IKEv2   SHA256+AES256             0        0        0 202.100.1.1
 

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文章题目：路由器和ASA预共享密钥方式建立IKEV2的L2L×××
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