Back to results
US 2010/0142548 A1Published application
Methods and apparatus for using both ldp and rsvp in a communications system
AssigneeJuniper Networks, Inc.
InventorNischal Sheth
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for allowing routers in an autonomous system to implement LDP and RSVP at the same time. RSVP can be used in the network core with LDP being used in network regions surrounding the core. LDP LSPs are tunneled through the RSVP network core using RSVP LSPs and label stacking techniques. During route selection LDP LSPs which use an RSVP LSP tunnel are preferred over alternative LDP LSPs having an equal cost associated with them to create a preference for traffic engineered routes.
Claims12
A communications method, comprising:
- establishing, using RSVP messaging, an RSVP label switched path traversing a first portion of a communications network;
- and
- establishing, using LDP messaging, a first LDP label switched path, said first LDP switched path traversing said RSVP label switched path;
- and
- storing cost information associated with the first LDP label switched path and an alternative LDP label switched path.
2 more elements
A communications network, comprising:
- a first router implementing RSVP messaging;
- and
- a second router implementing RSVP and label distribution protocol messaging coupled to said first router;
- a third router;
- and
- wherein the first router includes network configuration information learned from label distribution protocol messages, the network configuration information indicating the third router can be reached via a first route including an RSVP label switched path tunnel and by a second route which does not include an RSVP label switched path tunnel.
3 more elements
Dependencies are inferred from the claim text.