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List:       centos-virt
Subject:    Re: [CentOS-virt] Bonds, VLANs, and Bridges on Centos 5.6
From:       Jason Nagashima <jason () daylife ! com>
Date:       2011-11-23 21:49:56
Message-ID: 206550579.4866.1322084996341.JavaMail.root () mailbox01 ! hq ! daylife ! com
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Awesome!

Thank you everyone for responding and helping out. I'm happy to report that we got it \
working!

Cheers,
Jason

----- Original Message -----
From: "David Martin" <dmartls1@gmail.com>
To: "Discussion about the virtualization on CentOS" <centos-virt@centos.org>
Sent: Tuesday, November 22, 2011 12:39:02 PM
Subject: Re: [CentOS-virt] Bonds, VLANs, and Bridges on Centos 5.6

We are doing this quite a bit in production and it works great.

bond as you normally would:
DEVICE=bond0
ONBOOT=yes
USERCTL=no
BONDING_OPTS="mode=4 miimon=100"

one of these for each vlan (in this case 50):
VLAN=yes
VLAN_NAME_TYPE=VLAN_PLUS_VID_NO_PAD
DEVICE=vlan50
PHYSDEV=bond0
TYPE=Ethernet
ONBOOT=yes
BRIDGE=br50

and finally the bridge device to expose to guests:
DEVICE=br50
TYPE=Bridge
ONBOOT=yes
DELAY=0
GATEWAYDEV=none




On Tue, Nov 22, 2011 at 10:07 AM, Tait Clarridge <tait@taiter.com> wrote:
> On Fri, 2011-11-18 at 17:56 -0500, Jason Nagashima wrote:
> > Running on Centos 5.6 with KVM...
> > 
> > I was wondering if anyone had any luck configuring the NICs where eth0 and eth1 \
> > are bonded together with vlan support to a bridge? 
> > I noticed some threads show this as a possibility \
> > (http://lists.centos.org/pipermail/centos-virt/2009-November/001417.html), but \
> > haven't had any luck implementing it.  There also seems to be a bug with 5.6 \
> > (http://bugs.centos.org/view.php?id=4801), but that post died the day it was \
> > created it. 
> > Any advice/working examples would be greatly appreciated.
> 
> Hi Jason,
> 
> I have had luck doing this with Xen, where I create bond0 on a trunk
> interface and have xen bring it up as xenbr0 with pbond0 in the back
> end.
> 
> You should be able to do roughly the same by creating a bridge interface
> in /etc/sysconfig/network-scripts referencing bond0 as a member.
> 
> After that you should be able to run a script to create VLAN bridges
> like the following:
> 
> #!/bin/bash
> /sbin/modprobe 8021q
> 
> # Add your vlans here that you want with the numbers separated by a
> # space
> VLANS="5 10 15 20"
> # This should work with the bonding interface
> TRUNKINT="bond0"
> for VLAN in $VLANS
> do
> vconfig add $TRUNKINT $VLAN
> brctl add br$VLAN
> brctl addif br$VLAN $TRUNKINT.$VLAN
> ifconfig $TRUNKINT.$VLAN up
> ifconfig br$VLAN up
> done
> 
> I have done this with Xen on 5.5, 5.6 and 5.7... but it should work for
> KVM. If you create the standard bridge interface br0 using just bond0
> that will get you a trunk on whatever the native vlan is for that trunk.
> 
> Tait
> 
> 
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt@centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt
> 
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