Revision history details are not provided for features introduced before releases 21.2 and N5.5.
The new Graceful Card Migration functionality minimizes call loss during card migration failures when a double-fault scenario occurs due to either sessmgr or aaamgr task failures during migration.
This functionalilty is enabled by default and cannot be disabled.
show rct stats verbose command output was expanded.
In previous releases, any task failure which occurred during a card migration resulted in a complete call-loss. In this release, call loss is minimized to the failed task only. This new functionality applies to application-level failures of the aaamgr or sessmgr tasks.
The existing show rct stats verbose command output has been extended to display graceful recovery stats information if any during processing card migration.