Switch and packet forwarding method

Details Switch and packet forwarding method Switch and packet forwarding method

2011-04-19

2011-04-19

Harper, Kevin C (Department: 2462)

Multiplex communications

Diagnostic testing

Loopback

C370S252000, C370S392000, C370S400000

Reexamination Certificate

active

07929451

ABSTRACT:
A switch that performs packet forwarding processing based on a label for a connection in which a communication path is specified by the label, includes a receiving unit that receives loopback information with a label of a first layer used for packet forwarding for a first connection, and a packet processing unit that transmits a first loopback packet having a packet including the loopback information, a label of the first layer, and a label of a second layer used for packet forwarding for a second connection layered on the label of the first layer, and also transmits a second loopback packet having the packet including the loopback information and the label of the second layer.

REFERENCES:
patent: 2005/0053079 (2005-03-01), Havala
patent: 2005/0201273 (2005-09-01), Shimizu
patent: 2007/0183415 (2007-08-01), Fischer et al.
“Operation & Maintenance Mechanism for MPLS Networks”, ITU-T Series Y: Global Information Infrastructure, Internet Protocol Aspects and Next Generation Networks: Internet Protocol Aspects—Operation, Administration and Maintenance, pp. 1-27, Feb. 2004, Geneva, Switzerland.
“OAM Functions and Mechanisms for Ethernet Based Networks”, ITU-T Series Y: Global Information Infrastructure, Internet Protocol Aspects and Next Generation Networks: Internet Protocol Aspects—Operation, Administration and Maintenance, May 2006, pp. 1-70, May 2006, Geneva, Switzerland.

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