T-LDP status notification handling rules

Using Figure: Redundant VLL endpoint objects as a reference, this section describes the rules for generating, processing, and merging T-LDP status notifications in VLL service with endpoints. Any allowed combination of objects as specified in Redundant VLL service model, can be used on endpoints X and Y. The following sections see the specific combination objects in Figure: Redundant VLL endpoint objects as an example to describe the more general rules.