HP VPN Firewall Appliances VPN Configuration Guide

102
Displaying and maintaining tunneling configuration
Task Command Remarks
Display information about tunnel
interfaces.
display interface [ tunnel ] [ brief [ down ] ] [ |
{ begin | exclude | include }
regular-expression ]
display interface tunnel number [ brief ] [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Display IPv6 information on tunnel
interfaces.
display ipv6 interface tunnel [ number ]
[ brief ] [ | { begin | exclude | include }
regular-expression ]
Available in any view.
Clear statistics on tunnel
interfaces.
reset counters interface [ tunnel [ number ] ] Available in user view.
Troubleshooting tunneling configuration
Symptom
A tunnel interface configured with related parameters such as tunnel source address, tunnel destination
address, and tunnel mode cannot go up.
Solution
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 verify the physical interface of the
tunnel source is up. If the physical interface is down, check the network connections.
2. Another possible cause is that the tunnel destination is unreachable. Use the display ipv6
routing-table or display ip routing-table command to verify the tunnel destination is reachable. If
no routing entry is available for tunnel communication in the routing table, configure a route to
reach the tunnel destination.