H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Configuration
H3C S7500E Series Ethernet Switches Chapter 3 Tunneling Configuration
3-20
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.