[libvirt-users] net interface direct - no IP communication between guest & host

[Daniel P. Berrange]

On Tue, Oct 24, 2017 at 03:52:52PM +0100, lejeczek wrote:
> hi everyone
> 
> I wonder why, when I attach an interface like this:
> 
> virsh # attach-interface --domain win10Ent --type direct --source nm-team
> --config --persistent --model virtio
> 
> host cannot ip ping the guest and vice versa, yet guest can ping other
> nodes(outside of its host, connected via phys net via a switch)
> 
> Would you know?
> 
> I thought maybe routing on the host, so I did:
> $ route add -host 192.168.2.222 dev nm-team
> 
> but to no avail.
> 
> I wonder if it's lower layer, arp kernel bits?

I expect you'll be hitting this unfortunate gotcha:

https://wiki.libvirt.org/page/TroubleshootMacvtapHostFail

Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|