Re: [Xen-users] xenbr0 disappeared

[Asim <linkasim@xxxxxxxxx>]

Thanks Todd - These seem to be a wonderful set of debugging steps that I did not know - but unfortunately I could not catch the error.  My eth0 is working, eth1 is not enabled yet. Is it due to the way my kernel IP routing table is set? Kindly help.

[root@adsl-01 ~]# brctl show

bridge name     bridge id               STP enabled     interfaces

eth0            8000.00e0815caafe       no              peth0

eth1            8000.0007e93904bd       no              peth1

[root@adsl-01 ~]# /etc/xen/scripts/network-bridge status

============================================================

5: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue 

    link/ether 00:e0:81:5c:aa:fe brd ff:ff:ff:ff:ff:ff

    inet 128.105.104.101/24 brd 128.105.104.255 scope global eth0

    inet6 fe80::2e0:81ff:fe5c:aafe/64 scope link 

       valid_lft forever preferred_lft forever

5: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue 

    link/ether 00:e0:81:5c:aa:fe brd ff:ff:ff:ff:ff:ff

    inet 128.105.104.101/24 brd 128.105.104.255 scope global eth0

    inet6 fe80::2e0:81ff:fe5c:aafe/64 scope link 

       valid_lft forever preferred_lft forever

 

bridge name     bridge id               STP enabled     interfaces

eth0            8000.00e0815caafe       no              peth0

eth1            8000.0007e93904bd       no              peth1

 

128.105.104.0/24 dev eth0  proto kernel  scope link  src 128.105.104.101 

128.105.104.0/24 dev eth1  proto kernel  scope link  src 128.105.104.126 

169.254.0.0/16 dev eth1  scope link 

default via 128.105.104.248 dev eth0 

 

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

128.105.104.0   0.0.0.0         255.255.255.0   U     0      0        0 eth0

128.105.104.0   0.0.0.0         255.255.255.0   U     0      0        0 eth1

169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth1

0.0.0.0         128.105.104.248 0.0.0.0         UG    0      0        0 eth0

============================================================

[root@adsl-01 ~]# /etc/xen/scripts/network-bridge start

There are no errors but there is no xenbr0!

The sxp file:

(network-script 'network-bridge netdev=eth0')

(network-script network-bridge)

#(network-script network-route)

#(network-script network-nat)

(vif-script vif-bridge)

#(vif-script     vif-route)

#(vif-script     vif-nat)

Since these are static IPs, I'm confident that the working interface is eth0.

-Asim

On Thu, Jun 26, 2008 at 9:40 AM, Todd Deshane <deshantm@xxxxxxxxx> wrote:

Hi Asim,

On Thu, Jun 26, 2008 at 9:42 AM, Asim <linkasim@xxxxxxxxx> wrote:

Hi,

I was running Xen fine but installed an additional PCI network card and subsequently an additional network interface eth1

for it. This has caused xenbr0 to disappear and I cannot create/start any guest domains. I restarted xend but it has no

effect. Is there any way to re-create xenbr0. Kindly help.

It sounds like you are running into a problem with one of the bridge scripts.

Trying running /etc/xen/scripts/network-bridge manually to see any errors.

Please post the relevant lines of /etc/xen/xend-config.sxp

Also, do a brctl show and post that output as well.

Are you sure that the eth1 is the new card or the old card? It could be that you
just need to change the netdev in /etc/xen/xend-config.sxp.

Cheers,
Todd

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