Re: [libvirt] Notes on configuring Open vSwitch, Linux bridge and Libvirt
On Fri, Jul 12, 2013 at 05:51:14PM +0530, Kashyap Chamarthy wrote:
Heya Laine,
Here's some quick notes to associate libvirt guests to Open vSwitch.
Configure Open vSwitch
----------------------
Now that a regular Linux bridge is configured, let's try to configure an
OVS brdige and get IP addresses from that space:
Create an Open vSwitch bridge device called 'ovsbr', and display the
current state of OpenvSwitch database contents:
$ ovs-vsctl add-br ovsbr
$ ovs-vsctl show
Add a virtual ethernet interface called 'veth0' with
$ ip link add name veth0 \
type veth peer name veth1
Add 'veth0' ethernet device to the Linux bridge 'br0', and enumerate all
bridge devices:
$ brctl addif br0 veth0
$ brctl show
I don't really see why you are linking ovs to a traditional software
bridge. You now have the overheads of both bridging & ovs code in
your data path. Surely it is better to connect ovs with your physical
NIC, taking traditional bridges out of the loop completely.
Daniel
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