RSVP-TE graceful restart under fast re-route conditions
US8339942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2009 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Jan 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/825
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, in response to at least one of a link failure and node failure of a protected label switched path (LSP), network traffic is switched onto a protection path according to a fast re-reroute (FRR) scheme. A HELLO session is established with the remote node that is not immediately adjacent to the network element, including exchanging one or more HELLO messages with the remote node, each HELLO message having a time-to-live (TTL) value of greater than one if IP forwarding is used. The TTL value of the HELLO message is set to one if the HELLO message is sent via tunnel. In response to a request to restart, a resource reservation protocol (RSVP) traffic engineering (TE) graceful restart (GR) procedure is performed using information obtained from the one or more HELLO messages exchanged with the remote node during the HELLO session.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.