Re: [Xen-users] my eth3 lost connectivity when the xenbridge is setup

[Carsten from Virtastic <carsten@xxxxxxxxxxxxx>]

Hi Rogelio,


> After yum update completed, i reboot the host and all was ok, until xend 
> started....
> doing some researchm i found that the problem was only with eth3 after 
> enabling xenbr for it....

What does "brctl show" say?

> ##/etc/xen/scripts/network-bridge  $@ vifnum=5 bridge=xenbr1 netdev=eth3


Create these two files in /etc/sysconfig/network-scripts:

ifcfg-xenbr1:

TYPE=Bridge
DEVICE=xenbr1
ONBOOT=yes
STP=off
BOOTPROTO=none

(or if you want the bridge to have an IP, which might make sense for testing, 
use IPADDR and NETMASK together with BOOTPROTO=static)


ifcfg-eth3:

DEVICE=eth3
BRIDGE=xenbr1
HWADDR=<your_MAC_address>
BOOTPROTO=none
ONBOOT=yes


Then:
ifup xenbr1
ifup eth3

...and then you wait a few second until the bridge leaves learning state and 
enters forwarding state, and you should be all set.

I'd recommend to comment out all occurrences of 
# (network-script network-bridge)
in /etc/xen/xend-config.sxp, and then let the OS deal with the interface and 
bridge setup as shown above. I believe the wiki suggests the same for Xen 4.1 
(if not earlier versions), which doesn't actually need xend any more anyway.



Cheers
Carsten





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