Also icmp, ipv6 brings a lot of new things to the table in that realm. I already said it above, but the neighbor discovery protocol is quite useful to do dynami

Also icmp, ipv6 brings a lot of new things to the table in that realm. I already said it above, but the neighbor discovery protocol is quite useful to do dynamic in-band configuration. icmp is over ip, but it's not useful if the ip link is already managed by the tunnel protocol.