Persistence of MSC link affinity in a TCP/IP generic resource group

The affinity of an MSC link to a specific IMS system in a TCP/IP generic resource group is established when the link is started and is cleared when the link is stopped normally and assumes an NRE or COLD status.

In the event of a failure of an IMS system that has affinity, IMS Connect usually receives notification of the failure from the Structured Call Interface (SCI). After it is notified of the failure, IMS Connect terminates the link path to the failed IMS system and clears the link affinity.

If IMS Connect does not receive notification of the failure, the link affinity can persist. Link affinities that persist must be cleared manually in IMS Connect by issuing an IMS Connect command before the physical link can be restarted on another IMS system.