netdev - Re: Problem with IPv6 Route Cache

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Message-ID: <20130111223755.714ddf7f@natsu>
Date:	Fri, 11 Jan 2013 22:37:55 +0600
From:	Roman Mamedov <rm@...anrm.ru>
To:	<netdev@...r.kernel.org>
Subject: Re: Problem with IPv6 Route Cache

Hello,

I have discovered that when the problem is occuring, I have:

root@...u:~# ip -6 neigh
fd39:20::39 dev tun-rm  FAILED
fe80::20b:45ff:fe80:c000 dev eth0 lladdr 00:0b:45:80:c0:00 router REACHABLE
2a02:e00:ffff:56::1 dev eth0 lladdr 00:0b:45:80:c0:00 router REACHABLE

Launching "ping6 fd39:20::39" turns fd39:20::39 from FAILED to REACHABLE.
After that, "ip -6 route flush cache" actually succeeds in removing the route
via default gateway, and I then get the proper route entry:

root@...u:~# ip -6 route get fd39::100
fd39::100 from :: via fd39:20::39 dev tun-rm  src fd39:20::3  metric 0 
    cache

So I conclude that my issue is very similar to [1] mentioned in a Bugzilla
entry [2] linked here just today.

  [1] https://lkml.org/lkml/2012/5/25/96
  [2] https://bugzilla.kernel.org/show_bug.cgi?id=42991

-- 
With respect,
Roman

~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Stallman had a printer,
with code he could not see.
So he began to tinker,
and set the software free."

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