While building a virtual machine we ran into an error "Not enough MAC addresses left in MAC Address Pool."  In the engine log I see this message.

2013-10-26 14:47:16,590 WARN  [org.ovirt.engine.core.bll.network.vm.AddVmInterfaceCommand] (ajp--127.0.0.

1-8702-12) [6fc05fa4] CanDoAction of action AddVmInterface failed. Reasons:VAR__TYPE__INTERFACE,VAR__ACTI

ON__ADD,MAC_POOL_NOT_ENOUGH_MAC_ADDRESSES

2013-10-26 14:47:16,591 ERROR [org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (ajp--127.0

.0.1-8702-12) Operation Failed: [Not enough MAC addresses left in MAC Address Pool.]

This led me to look at the engine config where I see these

MacPoolRanges: 00:1A:4A:97:5E:00-00:1A:4A:97:5E:FF version: general

MaxMacsCountInPool: 100000 version: general

The MacPoolRange would seem to be the limiting factor here, cutting us off at 256 MAC addresses, which happens to be the number of virtual machine we currently have. I assume that updating the MacPoolRange and restarting the engine would resolve this issue. Has anybody experienced this issue?  Why would the pool size have 256 and the Max entry be set to 100000, that seems like a large difference.