Re: [Xen-users] eth0 is down in dom0

[Ken Cobler <kcobler@xxxxxxxxxxxxxx>]

Ingo Rauner wrote:
> Hi!
>
> I built a xen 3.3.0 kernel on a Debian GNU/Linux 4.0 r4a (AMD64). When 
> I boot the system without xen everything works fine. When I boot it 
> with xen the network is not working. Here are the outputs of `ifconfig 
> -a` for the system with and without xen:
> Without xen (everything is as it should be):
> -----------------------------------------------------
> # ifconfig -a
> eth0      Protokoll:Ethernet  Hardware Adresse <anonymized>
>          inet Adresse:192.168.2.105  Bcast:192.168.2.255  
> Maske:255.255.255.0
>          inet6 Adresse: fe80::21e:8cff:fece:7f/64 
> Gültigkeitsbereich:Verbindung
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:283 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:45 errors:0 dropped:0 overruns:0 carrier:0
>          Kollisionen:0 Sendewarteschlangenlänge:1000
>          RX bytes:31321 (30.5 KiB)  TX bytes:5393 (5.2 KiB)
>          Interrupt:177
>
> eth1      Protokoll:UNSPEC  Hardware Adresse <anonymized>
>          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
>          Kollisionen:0 Sendewarteschlangenlänge:1000
>          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>
> lo        Protokoll:Lokale Schleife          inet Adresse:127.0.0.1  
> Maske:255.0.0.0
>          inet6 Adresse: ::1/128 Gültigkeitsbereich:Maschine
>          UP LOOPBACK RUNNING  MTU:16436  Metric:1
>          RX packets:66 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
>          Kollisionen:0 Sendewarteschlangenlänge:0
>          RX bytes:5176 (5.0 KiB)  TX bytes:5176 (5.0 KiB)
>
> sit0      Protokoll:IPv6-nach-IPv4          NOARP  MTU:1480  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          Kollisionen:0 Sendewarteschlangenlänge:0
>          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
> -----------------------------------------------------
> Only eth0 is used, because eth1 is an onbord WLAN card that is 
> disabled in the bios (when I use ifconfig without the -a option, this 
> interface is not listed).
> With xen (no network interfaces except lo and the tmpbridge which is 
> not connected to any network interface):
> -----------------------------------------------------
> # ifconfig -a
> lo        Protokoll:Lokale Schleife          inet Adresse:127.0.0.1  
> Maske:255.0.0.0
>          UP LOOPBACK RUNNING  MTU:16436  Metric:1
>          RX packets:60 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
>          Kollisionen:0 Sendewarteschlangenlänge:0
>          RX bytes:4660 (4.5 KiB)  TX bytes:4660 (4.5 KiB)
>
> tmpbridge Protokoll:Ethernet  Hardware Adresse 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
>          Kollisionen:0 Sendewarteschlangenlänge:0
>          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
> -----------------------------------------------------
>
> I was not able to detect the problem from the logfiles. Which further 
> information do you need to detect the problem or what should I try out?
> Thanks, Ingo!
I have a similar problem.  I have researched enough to realize that my 
OpenSuse 10.3 and Xen 3.3 have some compatibility issues (mainly in the 
location of network scripts like ifup and ifdown).
If I switch from network-bridge to network-route for Xen, the interfaces 
come up as expected.
If I modify the network-bridge script, I can get the interface to come 
up.  I have to manually insert the route.
Ken Cobler
>
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