4 ms·
IPv6 tries to solve this with path MTU discovery.
by snuxoll 7y ago
IPv6 tries to solve this with path MTU discovery.
- inetknght 7y agoYes, but IPv6 is still at a higher level than Ethernet, Wifi, et al and is therefore subject to the limitations of the lower level framing
- snuxoll 7y agoSure? At this point 1500 is the standard, we can’t ever hope to increase it without a way to negotiate the acceptable value across the entire transmission path - that’s what IPv6 gives us.
- inetknght 7y agoI'm not sure that negotiating the acceptable value across the entire transmission path is a reasonable thing to do. I'm not sure that IPv6 _should_ be aware of a minimum/maximum MTU of underlying transmission path particularly since that path can often change transparently and each segment is subject to different requirements.
- jandrese 7y agoSure, I mean that's what pMTUd is all about. One big difference with IPv6: Routers can't fragment packets. They either send or they don't.
- pantalaimon 7y agoI thought so too, but apparently there is an IPv6 fragmentation extension and it's implemented by several operating systems.
- jandrese 7y agoOnly the endpoints can fragment.