Re: [Xen-users] CentOS 5.3 bond0 and xen 3.3.0

[Adam Wead <awead@xxxxxxxxxxx>]

On May 28, 2009, at 9:16 PM, Fajar A. Nugraha wrote:

> On Fri, May 29, 2009 at 3:55 AM, Mike Brady  
> <mike.brady@xxxxxxxxxxxxxx> wrote:
> > That would be because both Xen and RHEL/Centos are broken when it  
> > comes
> > to bonded bridged interfaces.
> > Apply the patch from https://bugzilla.redhat.com/show_bug.cgi? 
> > id=463014
> Thanks for the info. I have a similar setup, but strangely enough it
> works without any need for patch.
> Perhaps its because I'm using bridging on top of vlan on top of  
> bonding.
Mine works as well too, under Red Hat EL5, but I don't use any config  
file under sysconfig to create the bridge or any vlan either.  This  
may be why this bug didn't' affect me.  Instead I have Red Hat only  
create the bond device from the 2 interfaces, and have Xen create the  
bridge:
/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
USERCTL=no
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
PEERDNS=no
HWADDR=00:1A:64:09:26:F4
MASTER=bond0
SLAVE=yes

/etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
TYPE=Ethernet
USERCTL=no
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
PEERDNS=no
HWADDR=00:1A:64:09:26:F6
MASTER=bond0
SLAVE=yes

/etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=no
IPADDR=10.79.184.5
NETMASK=255.255.255.0
GATEWAY=10.79.184.254

Putting the following options under /etc/modprobe.conf takes care of  
the rest:
alias bond0 bonding
options bonding miimon=100 mode=0

Then, Xen creates the bridge to bond0 under /etc/xen/xend.cfg
(network-script 'network-bridge netdev=bond0')

and then creates pbond0, and xenbr0

The only problem I'm having with this setup is that I can apparently  
only attach one guest to xenbr0.  If I attach a second, it's network  
connectivity is unstable and it's inaccessible over the network.   
However, the setup works great for one guest: you can unplug either  
NIC and the network stays up.
There is a network-bridge-bonding script under /etc/xen/scripts that  
would seem to address everyone's needs.  I tried to use it under  
xend.cfg:
(network-script 'network-bridge-bonding netdev=bond0')

But could never get it to work...

I'd like to find out to attach multiple guests to a bonded device,  
but don't have an extra multi-NIC system handy to play with.  I'd  
appreciate hearing you all's views on this.
best,

...adam

Attachment: smime.p7s
Description: S/MIME cryptographic signature

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users