Re: Networking problem in domUs

[Saku Ytti <saku+xen-devel@ytti.fi>]

On (2006-02-15 12:19 -0600), David F Barrera wrote:

> I've been having issues with domU networking on an IBM xSeries 460. It
> is running several guest domains, and most, but not all, of them are
> having networking problems. These guest domains HAVE worked properly in
> the past, so it is unlikely a setup problem. 

http://lists.xensource.com/archives/html/xen-devel/2006-02/msg00360.html

It may be that you're facing same problem.

> 
> HW:
> IBM xSeries 460, SAS drives, 8GB of RAM
> 0000:0f:01.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 Gigabit
> Ethernet (rev 10)
> Distro: SLES 9 SP2
> 
> changeset:   8833:39b392a22002 (and 8830 before that)
> tag:         tip
> user:        kaf24@firebug.cl.cam.ac.uk
> date:        Tue Feb 14 12:43:45 2006 +0100
> summary:     Fix segment-register dumping in show_registers()
> 
> For example, when I ping one of them:
> x366-xentest:/skyline/barrera/xm-test # ping x460-xentest-vm8
> PING x460-xentest-vm8.ltc.austin.ibm.com (9.3.190.126) 56(84) bytes of data.
> 64 bytes from x460-xentest-vm8.ltc.austin.ibm.com (9.3.190.126): icmp_seq=1
> ttl=63 time=0.609 ms
> wrong data byte #22 should be 0x16 but was 0x0
> #16     10 11 12 13 14 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> #48     0 0 0 0 0 0 0 0
> 64 bytes from x460-xentest-vm8.ltc.austin.ibm.com (9.3.190.126): icmp_seq=2
> ttl=63 time=0.592 ms
> wrong data byte #22 should be 0x16 but was 0x0
> #16     10 11 12 13 14 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> #48     0 0 0 0 0 0 0 0
> 64 bytes from x460-xentest-vm8.ltc.austin.ibm.com (9.3.190.126): icmp_seq=3
> ttl=63 time=0.533 ms
> wrong data byte #22 should be 0x16 but was 0x0
> #16     10 11 12 13 14 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> #48     0 0 0 0 0 0 0 0
> 
> ----
> vm8 is configured properly:
> [root@x460-xentest-vm8 ~]# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:16:3E:51:9D:72
>           inet addr:9.3.190.126  Bcast:9.3.190.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:12165 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:342 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:1408961 (1.3 MiB)  TX bytes:54400 (53.1 KiB)
>  
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:22 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1672 (1.6 KiB)  TX bytes:1672 (1.6 KiB)
> 
> The networking on the guest domain is set up properly; however, I can't ssh or ping any machines.
> Out of roughly 10 guest domains, only a couple have functioning networking.
> Again, this setup has worked in the past.
> 
> 
> -- 
> Regards,
> 
> David F Barrera
> Linux Technology Center
> Systems and Technology Group, IBM
> 
> "The wisest men follow their own direction. "
>                                                         Euripides
> 
> 
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-- 
  ++ytti