Hi Vincent, Although Joe and I may not agree on all points (yet), I am pretty sure that one point we do agree on is that tunnels will ultimately need to account for fragmentation of one form or another. Without fragmentation, nested tunnels within tunnels can only recurse so far until an MTU underrun is encountered. And, without fragmentation, tunnels cannot support a minimum MTU if they traverse links with sufficiently small MTUs even if there is no nesting.
It is true that one possibility is for the tunnel to simply shut down if it encounters an MTU underrun meaning that one or more destinations will simply become unreachable. But, that sort of arrangement may not be acceptable for safety-critical communications where destinations should be made reachable through any means available. Would you agree that tunnels will ultimately need to account for fragmentation and reassembly? Thanks - Fred [email protected] _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
