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[Xen-bugs] [Bug 1240] New: Incorrect veth0 interface on reboot

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Subject: [Xen-bugs] [Bug 1240] New: Incorrect veth0 interface on reboot
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
Date: Sat, 3 May 2008 21:05:01 -0700
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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1240

           Summary: Incorrect veth0 interface on reboot
           Product: Xen
           Version: 3.0.3
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: drak@xxxxxxxxxxxx


I think I may have encoutered a bug in Xen.  I am using Xen as suplied by
RHEL5.

On this particular machine after a reboot I get an interface veth0 which has
all the same ip settings as eth0.  In this state no Xen instances hosted on
this machine are accessible to the network.

After a "service xend restart" the veth0 interface disappears and my Xen
instances can see the network.

I narrowed it down a little and found if I execute the following (from a screen
to avoid my SSH connection dropping) then it also removes this duff interface.

cd /etc/xen/scripts
./network-bridge stop;./network-bridge start 

When I reboot the machine, the misconfigured interface returns.

I then found that this condition only seems to occur when I have extra IP
addresses mounted on eth0 on interfaces eth0:1 and eth0:2 - if I remove them
from the server config, then when I reboot the server I dont get veth0 at all. 
I guess there is a bug with the briding startup scripts?  

Here is an ifconfig -a output on reboot

-------- START 

eth0      Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.95.229  Bcast:38.99.95.255  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:37 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          Interrupt:18 

eth0:1    Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.115.116  Bcast:38.99.115.127  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:18 

eth0:2    Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.95.241  Bcast:38.99.95.255  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:18 

eth1      Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F7  
          BROADCAST MULTICAST  MTU:1500  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:1000 
          Interrupt:19 

eth2      Link encap:Ethernet  HWaddr 00:E0:81:43:3F:90  
          BROADCAST MULTICAST  MTU:1500  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:1000 

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:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

veth0     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          inet addr:38.99.95.229  Bcast:38.99.95.255  Mask:255.255.255.128
          BROADCAST MULTICAST  MTU:1500  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:0 

veth1     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

veth2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

veth3     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.2    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.3    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

xenbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          UP BROADCAST RUNNING NOARP  MTU:1500  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:0 


-------------- END

and after  a "service xend restart"

-------------- START

eth0      Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.95.229  Bcast:38.99.95.255  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

eth0:1    Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.115.116  Bcast:38.99.115.127  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:2    Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F6  
          inet addr:38.99.95.241  Bcast:38.99.95.255  Mask:255.255.255.128
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth1      Link encap:Ethernet  HWaddr 00:E0:81:43:9C:F7  
          BROADCAST MULTICAST  MTU:1500  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:1000 
          Interrupt:19 

eth2      Link encap:Ethernet  HWaddr 00:E0:81:43:3F:90  
          BROADCAST MULTICAST  MTU:1500  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:1000 

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:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:21 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          Interrupt:18 

veth1     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

veth2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

veth3     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.2    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

vif0.3    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  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:0 

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:13 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

------------ END

Drak


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