I have been looking into bringing my IPv6 tunnel back up. Currently I have a Cisco switch handling my routing, which supports tunnels. However, it does not support tunnel mode ipv6ip but does support tunnel mode gre. I have been having some issues with IPv6 connectivity because of this. I could modify my transparent packet filter running OpenBSD box in to handle the routing but I would prefer not to. Can anyone shed some light if gre is supported on sonics end?