Fernando Gont wrote:
Folks,RFC 2460 states that every link in an internet have an MTU of 1280 octets or greater, and that any link that cannot convey a 1280-octet packet in one piece must provide fragmentation and reassembly at a layer bellow IPv6.However, while talking about the specs with a few folks (who preferred to remain anonymous), it was mentioned to me that in a number of scenarios (not necessarily those that involve tunnels), some links have an MTU smaller than 1280, and they do not perform the "fragmentation and reassembly function at a layer bellow IP" that RFC 2460 requires.
Then those links have to be fixed. Simple, nothing to it ;)This is why there are a couple of RFC's that explicitly detail how these links are used to transmit/use IPv6. Some for instance don't support multicast which thus breaks the whole concept of Neighbor Discovery etc.
Thus if you know any linktype which is not able yet to properly do IPv6, document them as a draft and submit it.
Greets, Jeroen
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