From: Florian Westphal <fw@strlen•de>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: Florian Westphal <fw@strlen•de>,
David Miller <davem@davemloft•net>,
netdev@vger•kernel.org
Subject: Re: [PATCH -next 0/2] net: allow setting ecn via routing table
Date: Fri, 31 Oct 2014 00:16:37 +0100 [thread overview]
Message-ID: <20141030231637.GF10069@breakpoint.cc> (raw)
In-Reply-To: <1414710342.15352.14.camel@edumazet-glaptop2.roam.corp.google.com>
Eric Dumazet <eric.dumazet@gmail•com> wrote:
> 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?
>
> Unfortunately some firewalls are buggy and accept a single SYN per flow.
[..]
> 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.
I see. So that makes ecn=1 default a pure fantasy.
Thanks for explaining this.
next prev parent reply other threads:[~2014-10-30 23:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-25 22:38 [PATCH -next 0/2] net: allow setting ecn via routing table Florian Westphal
2014-10-25 22:38 ` [PATCH -next 1/2] syncookies: remove ecn_ok validation when decoding option timestamp Florian Westphal
2014-10-25 22:38 ` [PATCH -next 2/2] net: allow setting ecn via routing table Florian Westphal
2014-10-28 20:57 ` [PATCH -next 0/2] " David Miller
2014-10-29 12:23 ` Florian Westphal
2014-10-30 19:59 ` David Miller
2014-10-30 20:52 ` Florian Westphal
2014-10-30 21:07 ` Eric Dumazet
2014-10-30 22:15 ` Florian Westphal
2014-10-30 23:05 ` Eric Dumazet
2014-10-30 23:16 ` Florian Westphal [this message]
2014-10-30 23:30 ` Eric Dumazet
2014-10-31 3:49 ` David Miller
2014-10-31 9:24 ` Daniel Borkmann
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