On 2/8/2016 9:21 AM, Ronald Bonica wrote: > Many end-stations work around this problem by sending packets no longer > that the IPv6 minimum MTU (1280 bytes). This ensures that IPv6 > fragmentation services will never be required. IPv6 1280 may itself not be fragmented, but it may end up in multiple IP fragments within an IP tunnel if the tunnel cannot assume an MTU that is larger. So if you have tunnels, fragmentation services are always ultimately required. Joe