On 06/26/2013 12:56 PM, Mark ZZZ Smith wrote: > > One of the issues with conventional ICMP PTB based PMTUD is the > default rate limits on ICMP messages on broadband routers with PPPoE > subscribers i.e. dumbell [1500][1492][1500] MTUs, slowing down PMTUD. > Upping the limit on ICMP PTBs is an obscure parameter to have to > remember to change, and it isn't clear exactly what to change it to - > IIRC, the value I've used in the past is 1000/s up from 10/s. RFC4821 > would be nice because it would avoid control plane processing that > ICMP based PMTUD causes.
Many implementers don't want to rely on a 100% ICMP-less PMTUD because of the potentially-lng convergence time (i.e. time to discover the PMTU). Thanks, -- Fernando Gont e-mail: ferna...@gont.com.ar || fg...@si6networks.com PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1 -- Fernando Gont SI6 Networks e-mail: fg...@si6networks.com PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
