Cisco Technology, Inc.

Keith Eric Neuendorff

Philippe J Daniel

Paul M Elliott

Phu Son Le

Xiaopin Nie

Brian Rushka

Each node () of a SONET bidirectional line switch ring (BLSR) () generates a squelch table. Squelch table generation does not require a separate computer connected to the node. Each node also generates a payload table indicating a type of a synchronous transport signals (STS) on each link () in the ring. The payload table allows each node to quickly determine the STS type on the protection channels when a ring switch occurs.

Generation of synchronous transport signal data used for network protection operation

A network element receives frames from multiple ring networks. Each ring network linked to the network element is supported by a designated support program. The received frames are monitored for conditions indicative of a failure in one of the ring networks. Upon detection of a failure condition, the designated support program for the failing ring network is determined and notified. The designated support program then addresses the failure condition by, for example, switching to a backup link. In one example, the multiple ring networks are SONET BLSR networks.

Multiple ring support within a single network element

Each node ( ) of a SONET bidirectional line switch ring (BLSR)( ) generates a squelch table. Squelch table generation does not require a separate computer connected to the node. Each node also generates a payload table indicating a type of a synchronous transport signals (STS) on each link ( ) in the ring. The payload table allows each node to quickly determine the STS type on the protection channels when a ring switch occurs.

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Petaluma, CA, United States of America

Keith Eric Neuendorff