Thanks for the reply.  I figured it out yesterday.  I just edited the VM Custom Mac Address and it works like a champ now...

I will setup that range and it should be good to go..  I am running oVirt 4.0..  oVirt is a nice product, beats the heck out of Xen Server..

On Sun, Sep 25, 2016 at 6:57 AM, Yevgeny Zaspitsky <yzaspits@redhat.com> wrote:

oVirt does not produce IP addresses, but it allocates MAC addresses to vNics on VMs it creates.
A MAC address serves as the base for an IPv6 address allocation (either by IPv6 router advertisement for global addresses or by an operation system for local addresses).

BTW, 2 vNics with the same MAC address in the same LAN, would cause layer 2 (Ethernet) malfunctioning too.

In order to make the 2 oVirt's produce different MAC addresses you need to adjust the definition of the MAC-pool ranges to be non-overlapping each to another.

You could find MAC-pool definitions under a DC definitions in v4.0 and under a cluster in v4.1.

Regards,

Yevgeny

On Sat, Sep 24, 2016 at 5:44 PM, Allen Warren <dallenwarren@gmail.com> wrote:

I have two oVirt servers running as local servers on the same network. How do I prevent the servers from creating the same ipv6 address for two different vm's. If I start a vm on the first server and then start one on the second server the ipv6 addresses are the same..

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