From: Hannes Frederic Sowa <hannes@stressinduktion•org>
To: Stas Sergeev <stsp@list•ru>, netdev <netdev@vger•kernel.org>
Subject: Re: Q: bad routing table cache entries
Date: Tue, 12 Jan 2016 16:52:39 +0100 [thread overview]
Message-ID: <56952147.80201@stressinduktion.org> (raw)
In-Reply-To: <56951D1D.5080602@stressinduktion.org>
On 12.01.2016 16:34, Hannes Frederic Sowa wrote:
> On 29.12.2015 11:54, Stas Sergeev wrote:
>> Hello.
>>
>> I was hitting a strange problem when some internet hosts
>> suddenly stops responding until I reboot. ping to these
>> host gives "Destination Host Unreachable". After the
>> initial confusion, I've finally got to
>> ip route get
>> and got something quite strange.
>>
>>
>> Example for GOOD address (the one that I can ping):
>>
>> ip route get 91.189.89.237
>> 91.189.89.237 via 192.168.8.1 dev eth0 src 192.168.10.202
>> cache
>>
>>
>> Example for BAD address (the one that stopped responding):
>>
>> ip route get 91.189.89.238
>> 91.189.89.238 via 192.168.0.1 dev eth0 src 192.168.10.202
>> cache <redirected>
>
> I tried to understand this thread and now wonder why this redirect route
> isn't there always. Can you please summarize again why this shouldn't
> happen? It looks totally fine to me from the configuration of your
> router and the subnet masks.
Just an addendum:
In IPv6 a redirect is seen as a notification telling hosts, this new
address is on the same link as you. I think this semantic is the same
for IPv4, so we are informing you that in essence you are getting a /32
route installed to your new interface and can do link layer resolving of
the new host.
I do think this is valid and fine.
Bye,
Hannes
next prev parent reply other threads:[~2016-01-12 15:52 UTC|newest]
Thread overview: 36+ 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
2016-01-12 20:33 ` David Miller
2016-01-12 15:34 ` Hannes Frederic Sowa
2016-01-12 15:52 ` Hannes Frederic Sowa [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56952147.80201@stressinduktion.org \
--to=hannes@stressinduktion$(echo .)org \
--cc=netdev@vger$(echo .)kernel.org \
--cc=stsp@list$(echo .)ru \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox