H3C Technologies H3C S7500E Series Switches - Manual (Page 202)

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[SwitchB] service-loopback group 1 type tunnel
# Add interface GigabitEthernet 2/0/3 to service loopback group 1.
[SwitchB] interface GigabitEthernet 2/0/3
[SwitchB-GigabitEthernet2/0/3] undo stp enable
[SwitchB-GigabitEthernet2/0/3] port service-loopback group 1
# Apply service loopback group 1 to the tunnel in tunnel interface view.
[SwitchB-GigabitEthernett1/0/3] quit
[SwitchB] interface tunnel 0
[SwitchB-Tunnel0] service-loopback-group 1
[SwitchB-Tunnel0] quit
# Configure a static route from Switch B through interface Tunnel 0 to Group 1.
[SwitchB] ip route-static 10.1.1.0 255.255.255.0 tunnel 0
Displaying and Maintaining Tunneling Configuration
To do… Use the command… Remarks
Display information about tunnel
interfaces
display interface tunnel [ number ] Available in any view
Display IPv6 information on tunnel
interfaces
display ipv6 interface tunnel
[ number ] [ verbose ]
Available in any view
Clear statistics on tunnel interfaces
reset counters interface [ tunnel
[ number ] ]
Available in user view
Troubleshooting Tunneling Configuration
Symptom: After the configuration of related parameters such as tunnel source address, tunnel
destination address, and tunnel mode, the tunnel interface is still not up.
Solution: Follow the steps below:
1) The common cause is that the physical interface of the tunnel source is not up. Use the display
interface tunnel or display ipv6 interface tunnel commands to view whether the physical
interface of the tunnel source is up. If the physical interface is down, use the debugging tunnel
event command in user view to view the cause.
2) Another possible cause is that the tunnel destination is unreachable. Use the display ipv6
routing-table or display ip routing-table command to view whether the tunnel destination is
reachable. If no routing entry is available for tunnel communication in the routing table, configure
related routes.