A directory gatekeeper group (DGKGrp) is a set of one to five directory gatekeepers (DGKs) configured for redundancy.
This configuration can be based on a primary, Hot Standby Router Protocol (HSRP), cluster, or overlap directory gatekeepers.
The primary directory gatekeeper monitors and routes the calls through the network.
HSRP consists of one or more directory gatekeepers that supports a number of gatekeepers. One directory gatekeeper acts on standby mode, while the other is active.
A clustered directory gatekeeper group contains at least two directory gatekeepers; one is primary and the second (or all remaining directory gatekeepers) must be configured as clustered.
The overlap directory gatekeeper monitors the calls and if the primary directory gatekeeper fails, the alternate takes over.
You can add server triggers and zone circuits to a directory gatekeeper group.
Note: You can only add a zone circuit to a directory gatekeeper group if the CSR route type of the AD is set to trunk-label or carrier AND the VRC feature set of the directory gatekeeper group is dp1.1 or later.