Transport network with circuitry for monitoring packet path...

Details Transport network with circuitry for monitoring packet path... Transport network with circuitry for monitoring packet path...

H - Electricity

04

L

H04L 29/14 (2006.01) H04L 1/20 (2006.01)

Patent

CA 2391672

A network node of a SONET ring is provided with a tributary line interface that receives packets from LAN users. A packet switch performs a switching operation on the LAN packets. An aggregate line interface establishes an STM path on a communication link and a number of packet paths within the STM path. An STM switch connects the packet switch between the tributary line interface and the aggregate line interface so that the switched packets are transported over the packet paths. Monitoring circuitry monitors the LAN packets and produces a warning signal if an abnormal condition is detected in one of the packet paths and transmits the warning signal to the communication link. Preferably, the monitoring circuitry is provided in the tributary line interface.

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