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Date: Thu, 30 Oct 2014 16:05:42 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Florian Westphal <fw@...len.de> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCH -next 0/2] net: allow setting ecn via routing table On Thu, 2014-10-30 at 23:15 +0100, Florian Westphal wrote: > Do you think a fallback to non-ecn for retransmitted syns would help? > If not, do you think having ecn tunable available via route is helpful? Unfortunately some firewalls are buggy and accept a single SYN per flow. You would need to blacklist ecn at first sign of a possible ecn problem, for all following connections attempts. Note that ECN problems are not only contained in SYN packets being eventually dropped. You might have a success to establish a flow, and later get CE marks for all packets and cwnd converges to 1. This is really a lot of work to get all sorted out. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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