Discovery and tag space identifiers in a tag distribution protocol (TDP)
US6512768B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/026
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A tag-switching router on a tag-switching network establishing a single tag distribution protocol (TDP) session with a peer for the advertisement of tag bindings shared by two or more interfaces and contemporaneously establishing with the peer one or more additional TDP sessions for the advertisement of tag bindings dedicated for use by specific interfaces. Each router interface has an assigned tag space comprised incoming tags that are appended by the peer to input data packets forwarded by the peer. A new Hello message carried in a TDP protocol data unit (PDU) is introduced for use in a TDP discovery mechanism. The router periodically multicasts a specific Hello message from each tag-switching enabled interface and a router TDP identifier in the TDP PDU header identifies the tag space that the router has assigned to the interface. When the router receives a Hello message from the peer at one of its interfaces, the router records the peer TDP identifier in a record associated with the interface to create a link adjacency. The router and peer establish a conventional TDP session to exchange tag binding sets. The router transmits to the peer a Bind message containing advertised tag …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.