Hi. I'm trying to see if KEEPALIVE mechanism that works on ipv4 GRE tunnels is also operative in ipv6ip tunnels. Although you can happily configure keepalive params in the interface, I can't see any effect (or even keepalive traffic) on both tunnel ends, so please if anyone can give me some hint/advice about what IOS or equipment is known keepalives works for ipv6ip tunnels, or even if this has been documented somewhere that it work/don't work, that would be really great.
Sincerely, it doesn't make me much sense to have interfaces that are always up (even when you shut down the other end)...
Regards,
JP Cerezo