Mpls device enabling service providers to control service...

H - Electricity – 04 – L

Patent

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H04L 12/56 (2006.01)

Patent

CA 2522869

A MPLS device which receives configuration data identifying a group of multi-labeled packets and desired EXP (corresponding to the 3-bit experimental bit field specified by MPLS protocol) bits (even in the lower label entries of the label stack) for the group when forwarding the related packets. The MPLS device sets the EXP bits of even such lower label entries, and then forwards the multi-labeled packets. MPLS devices further down the path may provide different services for different multi-labeled packets depending on the EXP bit values. A service provider may configure a autonomous system border router (ASBR) to control service levels for while packets are forwarded further down the path (even in autonomous systems not related to the service provider) according to an aspect of the present invention.

L'invention concerne un dispositif MPLS, qui reçoit des données de configuration identifiant un groupe de paquets à étiquettes multiples et des bits EXP désirés (même dans les entrées des étiquettes inférieures de la pile d'étiquettes) pour ledit groupe, au moment d'acheminer les paquets connexes. Le dispositif MPLS configure même les bits EXP desdites entrées des étiquettes inférieures, puis transmet les paquets à étiquettes multiples. Les dispositifs MPLS peuvent fournir, en chemin, différents services pour différents paquets à étiquettes multiples, selon les valeurs des bits EXP. Selon un aspect de l'invention, un fournisseur de services peut configurer un routeur de limites de systèmes autonomes (ASBR) afin de contrôler les niveaux de service lorsque les paquets sont acheminés plus en aval sur le parcours (même dans des systèmes autonomes non associés au fournisseur de services).

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