[ovirt-users] Confused by logical networks

Paul-Erik Törrönen poltsi at poltsi.fi
Thu Feb 22 15:15:27 UTC 2018

I'm not sure how the logical networks should work and would appreciate 
if someone could shed some light into the matter, I've tried reading the 
documentation¹ but have not become any wiser :-/

For the sake of argument, I have two hosts in the same cluster/DC, They 
both have 2 network devices each (let's call them eth0 and eth1). On 
both hosts the ovirtmgmgt is connected to eth0 and uses the Host 1 is and host 2 is All four 
network devices are connected to one switch.

Then I create a logical network, mylogic which should be, 
which I assign to eth1 on each host, but define only for host 1 an 
ip-address,, host 2 has also the network assigned to eth1, 
but withouth an ip address.

Next I create vm1 on host 1, give it a single virtual network connection 
to mylogic, and configure the guest to use with gw Obviously I can from the guest ping which is 
the host address on the logical network as the guest is running on the 
same hardware where the host ip address is defined.

However, and this is where my confusion lies, if I now create another 
vm, vm2, on host 2, attach its network device to the mylogic network and 
configure it to use with gw, I can not ping 
neither nor

My understanding is that vm2 should be able to ping the wm1 as well as 
the gateway address defined on host 1. However this does not seem to be 
the case.

What have I missed here?



¹ https://www.ovirt.org/documentation/admin-guide/chap-Logical_Networks/

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