I said this at the mic, but I'm not sure there's anything really GRE-specific here. If you generalize it then my question is...
RFC 4213 has this algorithm as a "SHOULD employ": > if (IPv4 path MTU - 20) is less than 1280 > if packet is larger than 1280 bytes > Send ICMPv6 "packet too big" with MTU = 1280. > Drop packet. > else > Encapsulate but do not set the Don't Fragment > flag in the IPv4 header. The resulting IPv4 > packet might be fragmented by the IPv4 layer > on the encapsulator or by some router along > the IPv4 path. > endif > else > if packet is larger than (IPv4 path MTU - 20) > Send ICMPv6 "packet too big" with > MTU = (IPv4 path MTU - 20). > Drop packet. > else > Encapsulate and set the Don't Fragment flag > in the IPv4 header. > endif > endif How/why is the Default Strategy in section 2.2 of this doc different from the RFC recommended algorithm above? -Dave _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
