[openib-general] routing weirdness
Moni Shoua
monis at voltaire.com
Wed Nov 29 03:49:24 PST 2006
Michael S. Tsirkin wrote:
>>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?
and it's also worth looking at the routing cache (netstat -rnC)
>
>
>>Which OS are you using?
>
>
> SLES10.
>
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