Administrator Guide

● If the logical ip address is configured.
● If Tunnel mode is ipv6ip (where ip address over tunnel interface is not possible).
To ping the unnumbered tunnels, the logical address route information must be present at both the ends.
NOTE: The ipv6 unnumbered command can specify an interface name that does not exist or does
not have a configured IPv6 address. The tunnel interface is not changed to operationally up until the
logical ip address is identified from one of the address family.
Usage
Information
The ipv6 unnumbered command will fail if the tunnel interface already has an explicit IPv6 address
assigned. Likewise the ipv6 address command will fail if ipv6 unnumbered is already configured. While
unlikely, an interface can be configured to be ipv6 unnumbered for IPv6 while also having an explicit IPv4
address.
NOTE: The ipv6 unnumbered command can specify an interface name that does not exist or does
not have a configured IPv6 address. The tunnel interface is not changed to operationally up until the
logical ip address is identified from the one of the address family.
1264 Tunneling