> On first reading I thought eth1 would have been your second interface > within the guest, besides eth0. Meanwhile I think you just skipped eth0. There is a eth0 interface, but it is connected to the internal NAT network of libvirt. That way I have a LAN between my guests and eth1 is used for external access. > That is because you can have just 1 default route. The OVH document does > not describe a setup for a 2nd interface. Yes I did have issue with that because the DHCP on eth0 was setting a gateway. I solved it by forcing: GATEWAY=IP.OF.HOST.GATEWAY (=x.y.z.254) in eth0 as well. Here is the ifcfg-eth0: # Virtio Network Device DEVICE=eth0 BOOTPROTO=dhcp HWADDR=33:33:33:33:33:33 ONBOOT=yes GATEWAY=IP.OF.HOST.GATEWAY > Especially when dealing with more than 1 interface, do NOT set the GATEWAY > in ifcfg-ethX. By principle always set GATEWAY (in your case > GATEWAY=x.y.z.254) in /etc/sysconfig/network. Thus you do not need the ok, good to know, I will fiddle with that. > If you would have more than 1 interface (the OVH doc does not indicate to > be written for such a case, neither notes explicitly to give problems in > that case), then following the OVH doc gives you trouble. It actually works fine when I had many virtualized interfaces (eth2, eth3, etc.). And I actually don't need to add other route-eth2, route-eth3, etc. (because route-eth0 set the default gateway, isn't it?) > An aliases interface does not have an own MAC, it is physically the same > MAC as the primary interface. maybe that is were I am doing something wrong, because I configured this virtual MAC within OVH. > You created a route-eth1:1 file? yes, I tried that but it did not help. and as put above it was not necessary for the other virtual interfaces. > Yes, as said, the security design of the hoster must permit the use of > defined IPs bound with a dedicated MAC. Ask you hoster. I will ask them, they are pretty helpful in general. > You can add additional IPs to virtualized interfaces - either by good to know that is feasible Thanks for your help!