> Reify the MTU into the IP layer. No more ICMP nonsense for PMTU.
If the MTU is fixed, you can't have VPNs, or any other protocol that encapsulates IPv6 packets and then sends them over IPv6. There needs to be some way for a middlebox to communicate that the MTU is lower than normal on a specific path because it is taking up a bit of every packet for overhead.
If the MTU is fixed, you can't have VPNs, or any other protocol that encapsulates IPv6 packets and then sends them over IPv6. There needs to be some way for a middlebox to communicate that the MTU is lower than normal on a specific path because it is taking up a bit of every packet for overhead.