GNS下搭建ISIS和BGP混合网络环境

R1、R2、R3、R4之间起BGP协议，R1的AS域为100，其余AS域为200，然后在R2和R4之间同时起ISIS协议，两者可以同时运行，实验抓包截图如后面所示:

R1#enable

R1#config

Configuring from terminal, memory, ornetwork [terminal

Enter configuration commands, one perline.  End with C

R1(config)#int f0/0

R1(config-if)#ip add 172.16.1.1255.255.255.0

R1(config-if)#no sh

*Dec 16 19:52:51.047: %LINK-3-UPDOWN:Interface FastEth

*Dec 16 19:52:52.047: %LINEPROTO-5-UPDOWN:Line protoco

R1(config-if)#int f0/1

R1(config-if)#ip add 192.168.1.6255.255.255.0

R1(config-if)#no sh

*Dec 16 19:54:14.651: %LINK-3-UPDOWN:Interface FastEth

*Dec 16 19:54:15.651: %LINEPROTO-5-UPDOWN:Line protoco

R1(config-if)#router BGP