Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 GRE Configuration Commands
3Com Corporation
2-8
Use the undo tunnel source command to delete the defined source address or source
interface.
By default, source address or source interface of tunnel is not specified in the system.
The specified source address of the tunnel is the real interface address sending GRE
packets, which should keep accordance with the specified destination address at the
opposite tunnel interface.
The same source address and destination address cannot be configured on two or
more tunnel interfaces using the same encapsulation protocol.
Related command: interface tunnel, destination.
Example
# Configure the interface tunnel5 on the router Quidway1, on which the real output
interface of the encapsulated packet is serial 0/0/0 (with the IP address of the interface
being 192.100.1.1.
[Quidway1-Tunnel5] source 192.100.1.1
Alternatively, you may specify the actual physical interface:
[Quidway1-Tunnel5] source serial 0/0/0
2.1.9 tunnel-protocol gre
Syntax
tunnel-protocol gre
undo tunnel-protocol
view
Tunnel interface view
Parameter
gre: Encapsulation protocol of the tunnel.
Description
Use the tunnel mode command to set encapsulation mode of the tunnel interface to
GRE.
By default, the encapsulation protocol of tunnel interface is GRE. Under the GRE mode,
users can execute and view the GRE related commands, whereas other relevant
commands are available under other modes.
Related command: interface tunnel.