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
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