Which MGCP message does a Cisco IOS MGCP gateway send to the backup Cisco Unified CM server when two consecutive keep-alive exchanges failed with the primary Cisco Unified CM server?
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A. B. C. D. E.D.
MGCP (Media Gateway Control Protocol) is a protocol used for controlling media gateways. In a Cisco Unified Communications Manager (CUCM) environment, MGCP gateways are configured to register with the CUCM servers for call control purposes.
In the event of a failure of the primary CUCM server, the MGCP gateway will attempt to register with the backup CUCM server. If two consecutive keep-alive exchanges fail with the primary CUCM server, the MGCP gateway will send an NTFY (Notify) message to the backup CUCM server.
The NTFY message contains information about the failure and requests the backup CUCM server to take over call control. The backup CUCM server will then send an AUEP (Audit Endpoint) message to the MGCP gateway to verify its current state and retrieve its configuration. If the backup CUCM server determines that the MGCP gateway is in a valid state, it will send an RSIP (Request Specific Information) message to the gateway to retrieve call state information.
If the backup CUCM server determines that the MGCP gateway is not in a valid state, it will send an AUCX (Audit Connection) message to the gateway to initiate a new registration process.
Therefore, the correct answer to the question is C. NTFY.