[ovirt-users] guest often looses connectivity I have to ping gateway

[Nicolas Ecarnot]

Le 26/01/2017 à 09:03, Gianluca Cecchi a écrit :
> On Thu, Jan 26, 2017 at 8:45 AM, Pavel Gashev <Pax at acronis.com
> <mailto:Pax at acronis.com>> wrote:
>
>     Gianluca,
>
>     It looks like VM doesn't receive broadcasts. It can be a network
>     topology issue.
>     Could you double check /sys/class/net/bond1/bonding/mode and
>     /sys/class/net/bond1/bonding/slaves ?
>
>     Is it possible you have another VM with the same MAC address in the
>     same network segment?
>
>
> Pavel, I think you are right! Thanks!
> I didn't take into consideration that there is another oVirt environment
> that has some VMs on this vlan..
> And I found a VM with the same mac 00:1a:4a:16:01:51 (and a different ip)
> Now I powered off that other VM, restarted my one and things seem ok.
>
> What is the best way to manage when more oVirt environments has VMs on
> the same vlans?

I encountered the same problem some years ago, as we have multiple oVirt 
environnements.
We decided to assign specific MAC pools for each env to avoid overlapping.

-- 
Nicolas ECARNOT