实验条件

网络拓朴

实验目的

为PC1和PC2建立IPSec VPN
PC1可以ping通PC2

开始配置

1. R2 Ping R3确定基础网络是通的

R2#show ip int br
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                192.168.1.254   YES TFTP   up                    up      
Ethernet0/1                12.1.1.2        YES TFTP   up                    up      
Ethernet0/2                unassigned      YES TFTP   administratively down down    
Ethernet0/3                unassigned      YES TFTP   administratively down down    
NVI0                       192.168.1.254   YES unset  up                    up      
R2#ping 13.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 13.1.1.3, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms
R2#ping 13.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 13.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
R2#ping 192.168.1.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/5/6 ms
R2#ping 192.168.2.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.254, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)

基本网络可以

2. 配置R2

R2#conf t 
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#crypto isakmp policy 10 
R2(config-isakmp)#encryption aes 256 
R2(config-isakmp)#authentication pre-share 
R2(config-isakmp)#hash sha512
R2(config-isakmp)#group 5 
R2(config-isakmp)#lifetime 3600
R2(config-isakmp)#crypto isakmp key CISCO address 13.1.1.3
R2(config)#crypto ipsec transform-set mySET esp-aes 256 esp-sha512-hmac 
R2(cfg-crypto-trans)#mode tunnel 
R2(cfg-crypto-trans)#crypto map myMAP 10 ipsec-isakmp
% NOTE: This new crypto map will remain disabled until a peer
        and a valid access list have been configured.
R2(config-crypto-map)#set peer 13.1.1.3
R2(config-crypto-map)#match address 101
R2(config-crypto-map)#access-list 101 permit ip 192.168.1.0 0.0.0.255 192.168.$
R2(config)#int e0/1
R2(config-if)#crypto map myMAP
R2(config-if)#
*Mar 31 13:21:50.243: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON

3. 配置R3

R3#conf t 
Enter configuration commands, one per line.  End with CNTL/Z.
R3(config)#crypto isakmp policy 10
R3(config-isakmp)#encryption aes 256 
R3(config-isakmp)#authentication pre-share 
R3(config-isakmp)#hash sha512
R3(config-isakmp)#group 5
R3(config-isakmp)#lifetime 3600
R3(config-isakmp)#crypto isakmp key CISCO address 12.1.1.2
R3(config)#crypto ipsec transform-set mySET esp-aes 256 esp-sha512-hmac 
R3(cfg-crypto-trans)#mode tunnel 
R3(cfg-crypto-trans)#crypto map myMAP 10 ipsec-isakmp
% NOTE: This new crypto map will remain disabled until a peer
        and a valid access list have been configured.
R3(config-crypto-map)#set peer 12.1.1.2
R3(config-crypto-map)#match address 101
R3(config-crypto-map)#access-list 101 permit ip 192.168.2.0 0.0.0.255 192.168.$
R3(config)#int e0/2
R3(config-if)#crypto map myMAP
R3(config-if)#
*Mar 31 13:26:16.710: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON
R3(config-if)#    

4. 测试

R4#ping 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
..!!!
Success rate is 60 percent (3/5), round-trip min/avg/max = 1/1/1 ms
R4#ping 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
R4#

实验完成