On 3/9/19 17:33, Templin (US), Fred L wrote: > Why was this section taken out: > >> 1.1. IP-in-IP Tunnels >> >> This document acknowledges that in some cases, packets must be >> fragmented within IP-in-IP tunnels [I-D.ietf-intarea-tunnels]. >> Therefore, this document makes no additional recommendations >> regarding IP-in-IP tunnels. > > Tunnels always inflate the size of packets to the point that they may exceed > the path MTU even if the original packet is no larger than the path MTU. And, > for IPv6 the only guarantee is 1280. Therefore, in order to robustly support > the minimum IPv6 MTU tunnels MUST employ fragmentation.
Isn't that an oxymoron? If fragmentation is fragile, if you need something robust, you need to rely on something else.... -- Fernando Gont SI6 Networks e-mail: [email protected] PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
