Automatic Gatekeeper Discovery

Available only when the H.323 interface is functioning as a gateway, this feature allows for automatic gatekeeper discovery on start-up.

This feature is based on the Oracle® Enterprise Session Border Controller sending a GRQ to the multicast address of the RAS Multicast Group, which is the device group listening on this address. If you do not configure a multicast address, Oracle® Enterprise Session Border Controller uses the well-known address and port 224.0.1.41:1718 in the address-port combination making up this parameter.

Multicast only functions when the Oracle® Enterprise Session Border Controller is discovering an external gatekeeper. The Oracle® Enterprise Session Border Controller does not respond to multicast gatekeeper queries.

When it receives a GCF message from a gatekeeper, the Oracle® Enterprise Session Border Controller registers with the gatekeeper indicated in the GCF. When it receives an GRJ message that contains optional information about alternative gatekeepers, the Oracle® Enterprise Session Border Controller attempts to register with an alternate.

If you do not use automatic gatekeeper discovery, the Oracle® Enterprise Session Border Controller registers with the gatekeeper you configure in the gatekeeper parameter. In this case, the gatekeeper identifier you configure is included in to the RRQ. No registration a takes place if you do not establish automatic gatekeeper discovery or if you do not configure the gatekeeper and its identifier.