Restoring aggregated circuits with circuit integrity checks in a hierarchical network

摘要

A system and method is disclosed that assures component circuits transported in aggregated circuits restore correctly after an aggregated circuit fault. The system and method implements component circuit tail segment integrity checks whenever an aggregated circuit is restored in a higher level of a network hierarchy. Switches at both ends of an aggregated circuit perform circuit integrity checks of the tail segments of every component circuit. A failure of the component circuit integrity check on any component circuit causes that component circuit to be released and restored end-to-end.

主权项

1. A method for checking the integrity of switches in a component circuit, comprising:
transmitting a setup message for a new restoration route of an aggregated circuit to each of a plurality of components along the new restoration route; determining that resources cannot be allocated by each of the plurality of components along the new restoration route; releasing resources allocated by some of the plurality of components for the new restoration route; and calculating an alternate transport route to a destination component of an aggregated circuit in response to the releasing resources.