Method of monitoring a tandem connection in a MPLS...

Details Method of monitoring a tandem connection in a MPLS... Method of monitoring a tandem connection in a MPLS...

2011-03-08

2011-03-08

Ryman, Daniel J (Department: 2466)

Multiplex communications

Diagnostic testing

Using oam cells

C370S236200

Reexamination Certificate

active

07903565

ABSTRACT:
It is disclosed a method of monitoring, a Multi-Protocol Label Switching network, a tandem connection of a Label Switched Path. The tandem connection to be monitored has an input node and an output node. The method comprises the following steps: receiving a first Operation Administration Management packet at the input node; and generating a second OAM packet at the input node. According to the invention, the following steps are further performed: a tandem connection header is inserted into the first OAM packet; both the first OAM packet with the tandem connection header and the second OAM packet are sent towards the output node; and the second OAM packet is identified according to the presence or absence of said tandem connection header.

REFERENCES:
patent: 7373401 (2008-05-01), Azad
patent: 2005/0147050 (2005-07-01), Klink
ITU-T: “Operation & Maintenance mechanism for MPLS networks.” Y.1711, Feb. 2004.

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