Title:
A FAST REROUTE METHOD AND A LABEL SWITCH ROUTER
Document Type and Number:
WIPO Patent Application WO/2009/067906
Kind Code:
A1
Abstract:
A Fast Reroute method and a label switch router LSR in the communication technology
field are provided. The label switch router includes: a path message determination
module, a first determination module, a second determination module and a path
message processing module, for determining whether the received path message
is received from a bypass tunnel; if it is, then determining whether the protected
tunnel passes the head node of a bypass tunnel that uses the current node as a merge
point MP node; if it does not, then the path message is discarded, otherwise, the
path message is accepted. If said path message is received through the ordinary
path of a non-bypass tunnel, then it is determined whether the head node of the
bypass tunnel being used is in the Record Route Object of the path message received
from said ordinary path; if it is not, then the path message is accepted; otherwise,
then said path message received from said ordinary path is discarded. By changing
the process flow whereby nodes process path error messages and path messages,
the present invention effectively resolves the problem of processing the failure
of two adjacent links that are under bypass-tunnel protection.
Inventors:
KUMAR AMIT (CN)
Application Number:
PCT/CN2008/072985
Publication Date:
June 04, 2009
Filing Date:
November 07, 2008
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
KUMAR AMIT (CN)
KUMAR AMIT (CN)
International Classes:
H04L12/56
Foreign References:
| CN1921456A | 2007-02-28 | |||
| CN1816040A | 2006-08-09 | |||
| CN1738286A | 2006-02-22 | |||
| US20070070909A1 | 2007-03-29 | |||
| KR20030001635A | 2003-01-08 |
Other References:
See also references of EP 2219329A4
Attorney, Agent or Firm:
BEIJING CATALY IP ATTORNEY AT LAW (LimingSouth Division, the 8th Floor, Zhongtieke Mansion,Daliushu Road No. A2, Haidian District, Beijing 1, CN)
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