% >But I take it from your question that you'd like to see a fixed number for
% >the MTU. Is this really necessary?
%
% yes, it definitely needs to be a fixed number. in other words, IPv6
% link MTU should not be computed based on IPv4 PMTU (which is dynamic).
% PMTUD assumes that link MTUs are stable enough. by using IPv4 PMTU
% as basis for IPv6 link MTU, IPv6 link MTU will be affected by IPv4
% routing changes. it will have negative impact to IPv6 PMTUD.
%
% itojun
for "cross-talk" to occur, is there a presumption of fate-sharing
on links? e.g. do you presume that a single link will always
support both v4 and v6?
--
--bill
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