The Policy Connection Director (PCD) enables multiple MRA devices to handle connection-level routing as well as Diameter-level and binding-level routing. The PCD is not an independent entity; you configure an MRA device to have PCD functionality by creating a PCD association for one or more network elements associated with the MRA device.
Whenever a network element connects to an associated MRA device, the PCD establishes an MRA connection to the primary and secondary MRA devices that have a PCD association with the network element. In the event of a site failure, the PCD can reroute messages from the network element to the secondary MRA device at the connection level with minimal impact on processing.
The PCD enables individual MRA devices in a georedundant deployment to operate at greater capacity by reducing the processing impact of site-failover.