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US 2011/0211445 A1Published application
System and Method for Computing a Backup Ingress of a Point-to-Multipoint Label Switched Path
AssigneeFuturewei Technologies, Inc.
InventorHuaimo Chen
Life of this patent
Estimating the term…
Abstract
Disclosed is an apparatus that includes a path computation element (PCE) configured to communicate with a path computation client (PCC) and compute a backup ingress node for a Point-to-Multipoint (P2MP) Label Switched Path (LSP) in a network associated with the PCC. The backup ingress node is coupled to an ingress node of the P2MP LSP and to a plurality of next-hop nodes of the ingress node of the P2MP LSP via a backup tree.
Claims20
An apparatus comprising:
- a path computation element (PCE) configured to communicate with a path computation client (PCC) and compute a backup ingress node for a Point-to-Multipoint (P2MP) Label Switched Path (LSP) in a network associated with the PCC,
- wherein the backup ingress node is coupled to an ingress node of the P2MP LSP and to a plurality of next-hop nodes of the ingress node of the P2MP LSP via a backup tree.
A network component comprising:
- a receiver configured to receive a request message for computing a backup ingress node of a Point-to-Multipoint (P2MP) Label Switched Path (LSP) in a network;
- a circuit logic configured to attempt computing a backup ingress node for the P2MP LSP based on the network's topology and a set of constraints in the request message;
- and
- a transmitter configured to send a reply message comprising the computed backup ingress node if the backup ingress node is computed successfully.
1 more element
A method comprising:
- exchanging capability information between a path computation element (PCE) and a path computation client (PCC) during a session establishment between the PCE and the PCC,
- wherein the capability information are related to computing a backup ingress node for a Point-to-Multipoint (P2MP) Label Switched Path (LSP) in a network.
Dependencies are inferred from the claim text.