Enable port bonding on DNS/DHCP Servers even though VLAN interfaces have already been created (VLANs should be always be created before configuring bonding).
BlueCat advises any customers that require VLAN tagging on top of port bonding to configure bonding before configuring VLAN interfaces. However, if you created VLANs prior to configuring the bonding interface, perform the following procedure to enable port bonding with your VLANs.
To enable port bonding with existing VLAN interfaces: