From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: Stas Sergeev <stsp@list.ru>
Cc: netdev <netdev@vger.kernel.org>,
Alexander Duyck <alexander.duyck@gmail.com>
Subject: Re: Q: bad routing table cache entries
Date: Tue, 12 Jan 2016 09:47:25 -0500 [thread overview]
Message-ID: <20160112144725.GA30240@oracle.com> (raw)
In-Reply-To: <5695106D.8040909@list.ru>
On (01/12/16 17:40), Stas Sergeev wrote:
> Updated testing results:
> After I disabled shared_media not only for "all", but
> also for _all_ interfaces individually, the problem seem to
> have stopped. So thanks for these hints.
> Now, as the media is actually really shared (same NIC/cable),
> I just wonder what's going on here.
I dont know the history of the shared_media tunable (or
the rationale behind the default) - I was just reading out the
code - perhaps someone on the list who has the history can share
the motivation behind this tunable.
> And unfortunately we still don't know why these redirects are
> ever accepted...
I would guess that it is accepted because there is nothing
(no RFC chapter/verse) saying it should not.
But the fact remains that the network is sub-optimally configured-
each packet that triggers the redirect is now amplified at the
router - one copy gets forwarded, and one redirect gets sent back.
--Sowmini
next prev parent reply other threads:[~2016-01-12 14:47 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-29 10:54 Q: bad routing table cache entries Stas Sergeev
2015-12-29 11:58 ` Sowmini Varadhan
2015-12-29 12:06 ` Stas Sergeev
2015-12-29 12:32 ` Sowmini Varadhan
2015-12-29 12:43 ` Stas Sergeev
2015-12-29 13:19 ` Stas Sergeev
2015-12-29 15:22 ` Sowmini Varadhan
2015-12-29 15:38 ` Stas Sergeev
2015-12-29 17:40 ` Stas Sergeev
2015-12-30 12:42 ` Stas Sergeev
2015-12-30 14:17 ` Eric Dumazet
2015-12-30 17:56 ` David Miller
2016-01-04 1:05 ` Sowmini Varadhan
2016-01-04 1:32 ` Stas Sergeev
2016-01-04 17:23 ` Stas Sergeev
2016-01-12 14:40 ` Stas Sergeev
2016-01-12 14:47 ` Sowmini Varadhan [this message]
2016-01-12 20:33 ` David Miller
2016-01-12 15:34 ` Hannes Frederic Sowa
2016-01-12 15:52 ` Hannes Frederic Sowa
2016-01-12 16:03 ` Stas Sergeev
2016-01-12 16:10 ` Hannes Frederic Sowa
2016-01-12 16:42 ` Stas Sergeev
2016-01-12 16:56 ` Stas Sergeev
2016-01-12 17:06 ` Hannes Frederic Sowa
2016-01-12 17:18 ` Stas Sergeev
2016-01-12 17:26 ` Hannes Frederic Sowa
2016-01-12 17:33 ` Stas Sergeev
2016-01-12 17:47 ` Hannes Frederic Sowa
2016-01-12 20:43 ` Stas Sergeev
2016-01-12 22:26 ` Hannes Frederic Sowa
2016-01-12 22:57 ` Stas Sergeev
2016-01-12 23:07 ` Hannes Frederic Sowa
2016-01-13 12:59 ` Stas Sergeev
2016-01-12 17:41 ` Stas Sergeev
2016-01-12 15:57 ` Stas Sergeev
-- strict thread matches above, loose matches on Subject: below --
2015-12-28 15:26 Stas Sergeev
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