4000 Router Series Layer 3 - IP Services Configuration Guide

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56 bytes from 2002:3::1, icmp_seq=4 hlim=64 time=0.000 ms

--- Ping6 statistics for 2002:3::1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 0.000/0.000/0.000/0.000 ms

Displaying and maintaining tunneling configuration

Execute display commands in any view and reset commands in user view.

Task Command

Display information about tunnel interfaces.

display interface [ tunnel ] [ brief [ down ] ]

display interface [ tunnel [ number ] ] [ brief [ description ] ]

Display IPv6 information on tunnel interfaces.

display ipv6 interface [ tunnel [ number ] ] [ brief ]

Clear statistics on tunnel interfaces. reset counters interface [ tunnel [ number ] ]

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.

Analysis

The physical interface of the tunnel does not go up, or the tunnel destination is unreachable.

Solution

1. Use the display interface or display ipv6 interface commands to check whether the physical

interface of the tunnel is up. If the physical interface is down, check the network connection.

2. Use the display ipv6 routing-table or display ip routing-table command to check whether the

tunnel destination is reachable. If the route is not available, configure a route to reach the tunnel

destination.