3com 3031 Instruccion De Instalación

[Router1-Tunnel1/0/0]destination 131.108.5.2

[Router1-Tunnel1/0/0]quit

h Configure static route from Router1 to Group2 via interface Tunnel1/0/0.

[Router1]ip route-static 10.1.3.0 255.255.255.0 tunnel 1/0/0

2 Configure Router2:

a Configure interface Ethernet 0/0/0.

[Router2]interface ethernet 0/0/0

[Router2-Ethernet0/0/0]ip address 10.1.3.1 255.255.255.0

[Router2-Ethernet0/0/0]quit

b Configure interface Serial 2/0/1 (physical interface of Tunnel).

[Router2]interface serial 1/0/1

[Router2-Serial2/0/1]ip address 131.108.5.2 255.255.255.0

[Router2-Serial2/0/1]quit

c Create interface Tunnel 2/0/0.

[Router2]interface tunnel 2/0/0

d Configure IP address of interface Tunnel2/0/0.

[Router2-Tunnel2/0/0]ip address 10.1.2.2 255.255.255.0

e Configure encapsulation mode of Tunnel.

[Router2-Tunnel2/0/0]tunnel-protocol gre

a Configure source address of interface Tunnel 2/0/0 (IP address of Serial 2/0/1).

[Router2-Tunnel2/0/0]source 131.108.5.2

b Configure destination address of interface Tunnel 2/0/0 (IP address of Serial 

1/0/0 on Router1).

[Router2-Tunnel2/0/0]destination 192.13.2.1

[Router2-Tunnel2/0/0]quit

c Configure static route from Router2 to Group 1 via interface Tunnel2/0/0.

[Router2]ip route-static 10.1.1.0 255.255.255.0 tunnel 2/0/0

As GRE configuration is relatively simple, the only one point to be aware of is 
consistency. Most errors can be located by the 

 command. 

Here, only one related error is analyzed, as shown in the following figure:

Figure 223   Troubleshooting example of GRE

Fault 1: The interfaces at both ends of the tunnel are properly configured and both 
ends of the tunnel can be “pinged” through, but PC A and PC B can not be 
“pinged” through.

Troubleshooting: Perform the following steps:

PC  A

10.1.1.1/16

PC   B

10.2.1.1/16

Serial1/0/0

Serial2/0/1

Tunnel

Quidway1

Quidway3

Quidway2

Tunnel1/0/0

Tunnel2/0/0

Router1

Router3

Router2