Root node shutdown messaging for multipoint-to-multipoint...

Details Root node shutdown messaging for multipoint-to-multipoint... Root node shutdown messaging for multipoint-to-multipoint...

2007-07-06

2010-02-23

Wilson, Robert W (Department: 2419)

Multiplex communications

Network configuration determination

C370S255000, C370S256000, C370S390000, C370S432000, C709S208000, C709S238000

Reexamination Certificate

active

07668116

ABSTRACT:
In one embodiment, a method comprises registering, by a first label switching router having been identified as a root of a prescribed transport tree for transport of a prescribed group of data packets, at least two next hop label switching routers as belonging to the prescribed transport tree based on receiving respective label mapping messages; detecting by the first label switching router a prescribed condition indicating the first label switching router is to be removed from service as the root of the prescribed transport tree; and outputting, by the first label switching router, label distribution protocol messages for the prescribed transport tree to each of the next hop label switching routers determined as belonging to the prescribed transport tree, each label distribution protocol message indicating the first label switching router is to be removed from the service as the root of the prescribed transport tree.

REFERENCES:
patent: 2005/0259597 (2005-11-01), Benedetto et al.
patent: 2007/0104120 (2007-05-01), Shah-Heydari
patent: 2007/0153790 (2007-07-01), Boers et al.
patent: 2007/0177525 (2007-08-01), Wijnands et al.
patent: 2008/0273474 (2008-11-01), Yanagihara
Brockners et al., “Label Distribution Protocol Extensions for Half-Duplex Multipoint-to-Multipoint Label Switched Paths”, <draft-brockners-ldp-half-duplex-mp2mp-00.txt>, Network Working Group, Internet Draft, Feb. 26, 2007, pp. 1-21.
Minei et al., “Label Distribution Protocol Extensions for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths” <draft-ietf-mpls-ldp-p2mp-02>, Network Working Group, Internet Draft, Jun. 2006, pp. 1-23.
Rosen et al., “Multiprotocol Label Switching Architecture”, Network Working Group, Request for Comments: 3031, Jan. 2001, pp. 1-61.
Andersson et al., “LDP Specification”, Network Working Group, Request for Comments: 3036, Jan. 2001, pp. 1-133.

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