3com S7906E Manuel De Montage

 

1-39 

Configure a route through the 
tunnel 

Refer to the IP Routing Volume.

Optional 

Each end of the tunnel must 
have a route (static or dynamic) 
through the tunnel to the other 
end.  

 

Note that: 

z 

The source address and destination address of a tunnel uniquely identify a path. They must be 

configured at both ends of the tunnel and the source address at one end must be the destination 

address at the other end and vice versa.  

z 

Tunnel interfaces using the same encapsulation protocol must have different source addresses 

and destination addresses. 

z 

If you configure a source interface for a tunnel interface, the tunnel interface takes the primary IP 

address of the source interface as its source address.  

z 

When configuring a route through the tunnel, you can configure a static route, using the address of 

the network segment that the original packet is destined for as its destination address and the 

address of the peer tunnel interface as its next hop. Or, you can enable a dynamic routing protocol 

on both the tunnel interface and the router interface connecting the private network. 

Switch A and Switch B are interconnected through the Internet. Two private IPv4 subnets Group 1 and 

Group 2 are interconnected through a GRE tunnel between the two switches. 

Figure 1-14 Network diagram for a GRE over IPv4 tunnel 

 

 

 

Before the configuration, make sure that Switch A and Switch B are reachable to each other. 

 

1)  Configure Switch A 

# Configure an IPv4 address . 

<SwitchA> system-view 

[SwitchA] interface vlan-interface 100 

[SwitchA-Vlan-interface100] ip address 10.1.1.1 255.255.255.0