A gatekeeper group (GKGrp) is a dial plan entity composed of one or more physical gatekeepers.
One gatekeeper in each gatekeeper group must be designated as the primary gatekeeper. If a gatekeeper group contains more than one gatekeeper, the gatekeepers must be configured in a redundant manner using one of the following supported techniques:
Both overlap and HSRP
You can add zone circuits to a gatekeeper group.
Note: You can only add a zone circuit to a gatekeeper group if the CSR route type of the AD is set to trunk-label or carrier AND the VRC feature set of the gatekeeper group is dp1.1 or later.