From: Stephen Hemminger <stephen@networkplumber.org>
To: Seweryn Niemiec <ser@man.szczecin.pl>
Cc: bridge@lists.linux-foundation.org
Subject: Re: [Bridge] ssh connection not working when ssh server is behind a linux bridge
Date: Mon, 29 Jan 2018 12:38:48 -0800 [thread overview]
Message-ID: <20180129123848.64796ce6@xeon-e3> (raw)
In-Reply-To: <8ada1d8f-369e-b8b8-48c1-362500e37e8f@man.szczecin.pl>
On Mon, 29 Jan 2018 10:42:19 +0100
Seweryn Niemiec <ser@man.szczecin.pl> wrote:
> On 28.01.2018 23:28, Stephen Hemminger wrote:
> > These symptoms sound like an MTU mismatch.
> > The padding is not related. More likely, the issue is that one side
> > is sending a larger frame than the MTU of the underlying interface.
> > Since the bridge is a pure layer 2 interface, it has not choice
> > but to drop any frame where the size is greater than the MTU.
>
> I have a similar problem (same infrastructure and same symptoms) but with random
> occurrence. Ssh session hangs randomly, usually before the login prompt is
> shown), sometimes a bit later, sometimes after few days. I have MTU 1500 on all
> interfaces taking part in communication. Ping of any size works and as far as I
> tested, HTTP communication too, but there are problems with HTTPS.
>
If you see that, it usually is some middlebox in the way intefering with packets.
prev parent reply other threads:[~2018-01-29 20:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-28 20:15 [Bridge] ssh connection not working when ssh server is behind a linux bridge Adrian Pascalau
2018-01-28 22:28 ` Stephen Hemminger
2018-01-29 7:51 ` Adrian Pascalau
2018-01-29 9:37 ` Adrian Pascalau
2018-01-29 9:42 ` Seweryn Niemiec
2018-01-29 20:38 ` Stephen Hemminger [this message]
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