创建GRE隧道并成功

创建GRE隧道

R1：

Router#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#int tunnel 1

Router(config-if)#

%LINK-5-CHANGED: Interface Tunnel1, changed state to up

Router(config-if)#ip address 1.1.1.1 255.255.255.252

Router(config-if)#no shut

Router(config-if)#tunnel ?

destination  destination of tunnel

mode         tunnel encapsulation method

source       source of tunnel packets

Router(config-if)#tunnel source se0/3/0

Router(config-if)#tunnel destination 200.100.1.2

Router(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel1, changed state to up

Router(config-if)#end

R2：

Router#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#int tunnel 1

Router(config-if)#

%LINK-5-CHANGED: Interface Tunnel1, changed state to up

Router(config-if)#ip address 1.1.1.2 255.255.255.252

Router(config-if)#tunnel source se0/2/0

Router(config-if)#tunnel destination 200.100.1.1

Router(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel1, changed state to up

R2：

Router#ping 1.1.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 1.1.1.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/7/15 ms

BGP配置：

A和B为IBGP，即拥有相同的AS号，BC是EBGP，AS号不同，大概配置如下：A:router bgp 64512neighbor 20.1.1.1 remote-as 64512 //与B建立邻居network 10.1.1.0 mask 255.255.255.0 //发布内网网段B:router bgp 64512neighbor 20.1.1.2 remote-as 64512 //与A建立邻居neighbor 20.1.1.2 next-hop-self //改变传递的路由的下一跳为自己neighbor 30.1.1.2 remote-as 64513 //与C建立邻居C：router bgp 64513neighbor 30.1.1.1 remote-as 64512 //与B建立邻居network 40.1.1.0 mask 255.255.255.0 //发布内网网段这样PC1就能ping通PC2了