option 212 for 6RD

Mikael Abrahamsson swmike at swm.pp.se
Tue Jan 15 06:52:10 CET 2013

On Mon, 14 Jan 2013, Jeroen Massar wrote:

> The only thing that having 1480 in the RA might do is that some OSs 
> might advertise 1480 in the TCP MSS which does get to servers who are 
> stupid (really no other way to say that ;) and filter ICMP PTB and then 
> the problem is partially circumvented.

"some OSs"? Which one wouldn't?

Why "filter PTB"? With a lowered MSS (derived from the lower IPv6 MTU seen 
in the RAs) there will never be any PTBs needed.

Mikael Abrahamsson    email: swmike at swm.pp.se

More information about the ipv6-ops mailing list