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Symmetric Control Association

For control association between the PG and a PGC, you define the address and port of the PG and the PGC. The PG uses the address and port configured for the PGC when it sends registration messages to the PGC. If the registration reply contains a ServiceChangeAddress command, the PG connects to the PGC using the new address or port or both instead of the address and port configured in the CLI. The PG accepts only H.248 messages that arrive from the PGC address and port. All other messages are dropped.

In the following cases, the PG attempts to connect to the address and port configured on the router:

Loss of the PG-to-PGC connection
Restart of the pgcp-services
Reboot of the router

If needed, the PGC can reply with a new ServiceChangeAddress command.

The PG uses the new address in the ServiceAddressChange command only if the command is triggered by ServiceChangeReason 901 & 902. If the change is triggered by other ServiceChangeReasons such as 900, the PG uses the configured address and port.

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