Path setup device and method for label switching network
AssigneeFujitsu Limited
InventorsTohru Enoki, Yoshio Aoyagi
Life of this patent
Estimating the term…
Abstract
Upon reception of a label request for a new flow, a path setup device searches label switched paths (LPSs) which have already been set up for comparison with a path contained in the label request. If there exists an LSP of the same path as that in the label request, the same label as that of the LSP is allocated. If no such LSP exists, a new label is allocated. An LSP is set up based on the allocated label.
Claims8
A path setup device for setting up a label switched path in a label switching network including a plurality of routers, comprising:
- a decision device, when a label request is received, deciding whether there exists a label switched path which has already been set up and has the same path as a path corresponding to the label request;
- and
- a label allocation device, when the set-up label switched path exists, allocating the same label as a label of the set-up label switched path for the label request.
A computer-readable recording medium recorded with a program for setting up a label switched path in a label switching network including a plurality of routers, the program causing a computer to perform:
- when a label request is received, deciding whether there exists a label switched path which has already been set up and has the same path as a path corresponding to the label request;
- and
- when the set-up label switched path exists, allocating the same label as a label of the set-up label switched path for the label request.
A path setup method for setting up a label switched path in a label switching network including a plurality of routers, comprising:
- when a label request is received, deciding whether there exists a label switched path which has already been set up and has the same path as a path corresponding to the label request;
- when the set-up label switched path exists, allocating the same label as a label of the set-up label switched path for the label request;
- and
- when the set-up label switched path does not exist, allocating a new label for the label request.
A path setup device for setting up a label switched path in a label switching network including a plurality of routers, comprising:
- decision means for, when a label request is received, deciding whether there exists a label switched path which has already been set up and has the same path as a path corresponding to the label request;
- and
- label allocation means for, when the set-up label switched path exists, allocating the same label as a label of the set-up label switched path for the label request.
Dependencies are inferred from the claim text.