On 11/13/2012 02:34 AM, Fernando Gont wrote: > * If IPV6_USE_MIN_MTU means "use an MTU of 1280 bytes" (as opposed to > "use an MTU of *at most* 1280 bytes) then IPV6_USE_MIN_MTU might still > result in fragmentation. If, OTOH, IPV6_USE_MIN_MTU means "use an MTU of > at most 1280 bytes", then fragmentation might be prevented by signaling > any received ICMPv6 PTB to the upper layer, such that the TCP SMSS is > reduced acordngly, and hence fragmentation is avoided.
Is the second case really possible? MSS is defined to be always derived from the MTU. As the IPv6 minimum MTU is 1280 I see no way how the MSS could sink below 1280-40-20 bytes. -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
