Hello!
> I read somewhere that the correct size for an IPv6 link was 1500.
> Is this wrong? Is the correct MTU smaller? If it is, then sorry in
> advance ;-)
Yes, it is 1280. And lower MTUs are simply prohibited for IPv6 networks by law,
it is difference of IPv4, where network can have any mtu.
IPv6 is designed specially to avoid such things. If you have some
idea, when this can be useful, right starting point is not to hack something
contradicting to the ideology, but to workaround this at protocol level.
Side note: connection tracking is serious offence even for IPv4.
I am puzzled, why the code is so primitive and forces defragmentation
even when it is possible just to save fragments and resent them.
This prevents f.e. usage of conntrack on routers, which need only to account.
In fact, the most rarely happening case is considered as the most
common one... It would be good if IPv6 did this right from the very beginning,
rather than repeated mistakes of conntrack in IP.
Alexey
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