On Sat, Jan 9, 2010 at 11:15 PM, Jacob Hydeman jhydeman@gmail.com wrote:
Running CentOS 5.4 x64.
Have successfully bridged eth2 with br2 by following the instructions here: http://wiki.libvirt.org/page/Networking (under the RHEL section)
Have been running several KVM VMs successfully via this bridge.
I am now trying to bridge additional interfaces by using the same routine. Each bridge is named to correspond with the ethX device its bridged with.
Example of ifcfg-eth0 script: DEVICE=eth0 HWADDR=00:16:76:D6:C9:45 ONBOOT=yes BRIDGE=br0
then of ifcfg-br0 script: DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes DELAY=0
This is repeated 3 times for eth0-eth2 and br0-br2.
I've read somewhere that STP needs to be enabled when using multiple bridges. I've tried adding STP=on to the ifcfg-brX scripts but with the same result. Yes, brctl shows that STP is on.
The original bridge eth2-br2 continues to work but I can't get any traffic across any other bridge. Either by dhcp or static ips.
Is multiple bridges a possibility?
Previous to moving to KVM I was running Xen Server on the same hardware. I am just trying to recreate the network setup I had. I believe Xen Server runs on top of a linux platform so such a thing should be possible.
I am curious as to what exactly is your topology and which is its intended use. I have found no issues wrt STP but you seemingly need to assign different vlans to your VM interfaces, depending on which bridge they are attached to (i.e. roughly 1 bridge = 1 vlan). I am confused about what interfaces are attached to which bridge in your setup, would like to see the scripts you are using to start your VMs... Thank you in advance