[ovs-discuss] Trying to setup a VLAN with virtual guests

[Jesse Gross]

On Thu, Jun 14, 2012 at 3:30 AM, Abhishek Chanda
<abhishek.lists at gmail.com> wrote:
> Hi all,
>
> I am trying to setup a VLAN with a number of VMs (hosted on Virtualbox) on a
> blade server host. Here is what I did:
> 1. Installed the OVS kernel module and setup the server
> 2. Created a bridge and two tap devices on the host
> # ovs-vsctl add-br br0
> 3. Connected the the tap devices to the bridge with a VLAN tag
> # ovs-vsctl add-port br0 tap0 tag=34
> # ovs-vsctl add-port br0 tap1 tag=34
> 4. Configured the VMs in bridged mode to use tap0 and tap1 respectively
> 5. Assigned IP addresses to the VMs
>
> But now when I try to ping one VM from another, it succeeds at first and
> then says "Network is unreachable". Initially, both VMs have a routing table
> populated but after some time the table becomes empty automatically, that is
> when ping fails. Has this got something to do with my setup? Do I need to
> load the brcompat module too?

If something's changing your routing table then that's outside the scope of OVS.