From: "Arkadiusz Miśkiewicz" <a.miskiewicz@gmail•com>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: netdev@vger•kernel.org
Subject: Re: cache forver in 3.2.0-rc2-00400-g866d43c ?
Date: Wed, 23 Nov 2011 19:31:08 +0100 [thread overview]
Message-ID: <201111231931.08596.a.miskiewicz@gmail.com> (raw)
In-Reply-To: <1322072541.2775.1.camel@edumazet-laptop>
On Wednesday 23 of November 2011, Eric Dumazet wrote:
> Le mercredi 23 novembre 2011 à 19:10 +0100, Arkadiusz Miśkiewicz a
>
> écrit :
> > Hello,
> >
> > I'm using my notebook in two different networks, suspending and resuming
> > from ram between.
> >
> > Network A (192.168.1.0/24) has server with IP 87.204.99.133 in the same
> > lan. Now when I suspend, go to totally different network B (different
> > provider, different lan, 192.168.0.0/24) and resume then I'm unable to
> > connect to 87.204.99.133.
> >
> > Looks like network stack thinks that 87...133 is still directly reachable
> > on eth1and I'm unable to make it forget that.
> >
> > [root@t400 ~]# ip ne flush dev eth1; ip r flush table cache
> > [root@t400 ~]# ip r show table cache to 87.204.99.133
> > [root@t400 ~]# ping -c 1 87.204.99.133
> > PING 87.204.99.133 (87.204.99.133) 56(84) bytes of data.
> > From 192.168.0.5: icmp_seq=1 Destination Host Unreachable
> >
> > --- 87.204.99.133 ping statistics ---
> > 1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms
> >
> > zsh: exit 1 ping -c 1 87.204.99.133
> > [root@t400 ~]# ip r show table cache to 87.204.99.133
> > 87.204.99.133 dev eth1 src 192.168.0.5
> >
> > cache <redirected> ipid 0x2838 rtt 17ms rttvar 12ms cwnd 10
> >
> > 87.204.99.133 from 192.168.0.5 dev eth1
> >
> > cache <redirected> ipid 0x2838 rtt 17ms rttvar 12ms cwnd 10
> >
> > [root@t400 ~]# ip ne show to 87.204.99.133
> > 87.204.99.133 dev eth1 FAILED
> >
> > tcpdump in meantime sees this:
> > 19:06:26.907153 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
> > 87.204.99.133 tell 192.168.0.5, length 28
> > 19:06:27.908379 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
> > 87.204.99.133 tell 192.168.0.5, length 28
> > 19:06:28.907084 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
> > 87.204.99.133 tell 192.168.0.5, length 28
> > 19:06:29.907145 IP (tos 0xc0, ttl 64, id 34465, offset 0, flags [none],
> > proto ICMP (1), length 112)
> >
> > 192.168.0.5 > 192.168.0.5: ICMP host 87.204.99.133 unreachable,
> > length 92
> >
> > IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1),
> >
> > length 84)
> >
> > 192.168.0.5 > 87.204.99.133: ICMP echo request, id 17590, seq 1,
> > length 64
> >
> > Any ideas?
> >
> > Thanks,
>
> Hmm, could you check you have this fix in your tree ?
>
> http://git2.kernel.org/?p=linux/kernel/git/davem/net.git;a=commit;h=9cc20b2
> 68a5a14f5e57b8ad405a83513ab0d78dc
Mine 00400-g866d43c was after 6fe4c6d466e95d31164f14b1ac4aefb51f0f4f82 (which
is merge of ipv4: fix redirect handling), so I have it.
(I'm using pure linus git repo)
--
Arkadiusz Miśkiewicz PLD/Linux Team
arekm / maven.pl http://ftp.pld-linux.org/
next prev parent reply other threads:[~2011-11-23 18:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-23 18:10 cache forver in 3.2.0-rc2-00400-g866d43c ? Arkadiusz Miśkiewicz
2011-11-23 18:22 ` Eric Dumazet
2011-11-23 18:31 ` Arkadiusz Miśkiewicz [this message]
2011-11-23 18:37 ` Eric Dumazet
2011-11-23 19:44 ` Eric Dumazet
2011-11-23 20:35 ` Arkadiusz Miśkiewicz
2011-11-25 17:53 ` Arkadiusz Miśkiewicz
2011-11-26 22:10 ` Eric Dumazet
2011-11-26 22:13 ` [PATCH] inet: Eric Dumazet
2011-11-26 22:16 ` Eric Dumazet
2011-11-27 0:17 ` David Miller
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