[openib-general] routing weirdness

[Madhu Lakshmanan]

> -----Original Message-----
> From: openib-general-bounces at openib.org
[mailto:openib-general-bounces at openib.org] On Behalf Of
> Michael S. Tsirkin
> Sent: Wednesday, November 29, 2006 2:51 AM
> To: Moni Shoua
> Cc: openib-general at openib.org
> Subject: Re: [openib-general] routing weirdness
> 
> > Michael S. Tsirkin wrote:
> > > Hi!
> > > I have a 2 port card with interfaces configured to different
subnets.
> > > port 1 is down, port 2 is up.
> > > After some pinging, I see weird stuff in arp tables:
> > > does anyone have a clue why is linux trying to route
> > > packets to 12.4.3.87 trough ib0?
> > >
> > >
> > > sw086:~ # arp
> > > Address                  HWtype  HWaddress           Flags Mask
Iface
> > > mtlsv13.yok.mtl.com      ether   00:04:AC:A6:1F:B2   C
eth0
> > > 10.4.0.211               ether   00:03:47:24:B3:A3   C
eth0
> > > swlab37.yok.mtl.com      ether   00:02:B3:2B:2E:1B   C
eth0
> > > mtls05.yok.mtl.com       ether   00:02:B3:2B:2B:9F   C
eth0
> > > mtlsws02.yok.mtl.com     ether   00:02:B3:B0:3C:A6   C
eth0
> > > sw086:~ # ping 11.4.3.87
> > > PING 11.4.3.87 (11.4.3.87) 56(84) bytes of data.
> > >
> > > --- 11.4.3.87 ping statistics ---
> > > 2 packets transmitted, 0 received, 100% packet loss, time 1001ms
> > >
> > > sw086:~ # ping 12.4.3.87
> > > PING 12.4.3.87 (12.4.3.87) 56(84) bytes of data.
> > >
> > > --- 12.4.3.87 ping statistics ---
> > > 2 packets transmitted, 0 received, 100% packet loss, time 1003ms
> > >
> > > sw086:~ # arp
> > > Address                  HWtype  HWaddress           Flags Mask
Iface
> > > 12.4.3.87                        (incomplete)
ib0
> > > 11.4.3.87                        (incomplete)
ib0
> > > mtlsv13.yok.mtl.com      ether   00:04:AC:A6:1F:B2   C
eth0
> > > 10.4.0.211               ether   00:03:47:24:B3:A3   C
eth0
> > > mtlsws09.yok.mtl.com     ether   00:E0:81:05:AF:F4   C
eth0
> > > swlab37.yok.mtl.com      ether   00:02:B3:2B:2E:1B   C
eth0
> > > mtls05.yok.mtl.com       ether   00:02:B3:2B:2B:9F   C
eth0
> > > mtlsws02.yok.mtl.com     ether   00:02:B3:B0:3C:A6   C
eth0
> > > sw086:~ # ifconfig ib0
> > > ib0       Link encap:UNSPEC  HWaddr
00-00-04-04-FE-80-00-00-00-00-00-00-00-00-00-00
> > >           inet addr:11.4.3.86  Bcast:11.4.255.255
Mask:255.255.0.0
> > >           UP BROADCAST MULTICAST  MTU:2044  Metric:1
> > >           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> > >           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> > >           collisions:0 txqueuelen:128
> > >           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
> > >
> > > sw086:~ # ifconfig ib1
> > > ib1       Link encap:UNSPEC  HWaddr
00-00-04-05-FE-80-00-00-00-00-00-00-00-00-00-00
> > >           inet addr:12.4.3.86  Bcast:12.4.255.255
Mask:255.255.0.0
> > >           inet6 addr: fe80::202:c9ab:e987:fca2/64 Scope:Link
> > >           UP BROADCAST RUNNING MULTICAST  MTU:2044  Metric:1
> > >           RX packets:264 errors:0 dropped:0 overruns:0 frame:0
> > >           TX packets:412 errors:0 dropped:290 overruns:0 carrier:0
> > >           collisions:0 txqueuelen:128
> > >           RX bytes:21868 (21.3 Kb)  TX bytes:33188 (32.4 Kb)
> > >
> > >
> >
> > What do you see in the routing table?
> 
> How do you want me to dump it?

Try 'netstat -nr' or '/sbin/route' to dump the routing tables.

> 
> > Which OS are you using?
> 
> SLES10.
> 
> --
> MST