[ovirt-users] oVIRT 4 / OVN / Communication issues of instances between nodes.

[Lance Richardson]

> From: "Devin Acosta" <devin at pabstatencio.com>
> To: "Marcin Mirecki" <mmirecki at redhat.com>
> Cc: "users" <Users at ovirt.org>
> Sent: Monday, December 5, 2016 12:11:46 PM
> Subject: Re: [ovirt-users] oVIRT 4 / OVN / Communication issues of instances between nodes.
> 
> Marcin,
> 
> Also I noticed in your original post it mentions:
> 
> ip link - the result should include a link called genev_sys_ ...
> 
> I noticed that on my hosts I don't see any links with name: genev_sys_ ??
> Could this be a problem?
> 
> lo:
> enp4s0f0:
> enp4s0f1:
> enp7s0f0:
> enp7s0f1:
> bond0:
> DEV-NOC:
> ovirtmgmt:
> bond0.700 at bond0:
> DEV-VM-NET:
> bond0.705 at bond0:
> ;vdsmdummy;:
> vnet0:
> vnet1:
> vnet2:
> vnet3:
> vnet4:
> ovs-system:
> br-int:
> vnet5:
> vnet6:
> 

Hi Devin,

What distribution and kernel version are you using?

One thing you could check is whether the vport_geneve kernel module
is being loaded, e.g. you should see something like:

    $ lsmod | grep vport
    vport_geneve           12560  1 
    openvswitch           246755  5 vport_geneve

If vport_geneve is  not loaded, you could "sudo modprobe vport_geneve"
to make sure it's available and can be loaded.

The first 100 lines or so of ovs-vswitchd.log might have some useful
information about where things are going wrong.

It does sound as though there is some issue with geneve tunnels,
which would certainly explain issues with inter-node traffic.

Regards,

    Lance