[Xen-bugs] [Bug 535] New: domU networking problem

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=535

           Summary: domU networking problem
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: dbarrera@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx,niv@xxxxxxxxxx,pl@xxxxxxxxxx


I've been having issues with domU networking on this machine. 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. 


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@xxxxxxxxxxxxxxxxxxxx
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)

However, it does not have networking, i.e. 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.

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