Nico Kadel-Garcia writes:
NetworkManager and system-config-network do not really handle pair bonding very well, so you've obviously set it up by hand. this is the point where, getting a paid license RHEL license for your KVM server gets you direct access to their support team.
My servers don't use NM. Cf. other discussions on the main centos list :)
In particular, post your bridge settings. I think they should be set to "failover", not to the other, more complex and load balanced settings, to avoid confusing your switches and possibly KVM clients.
This? Or is there more information available?
# brctl show bridge name bridge id STP enabled interfaces br0 8000.00215e4d349b no bond0 vnet0 vnet1 vnet2 vnet3 vnet4 vnet5 vnet6 virbr0 8000.525400825a69 yes virbr0-nic #