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TE (Traffic Engineering) tunnel establishing method and equipment

A device and tunnel technology, applied in the field of communication, can solve problems such as tunnel establishment failure

Active Publication Date: 2011-07-13
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method of randomly selecting a path for TE tunnel establishment will lead to the failure of tunnel establishment

Method used

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  • TE (Traffic Engineering) tunnel establishing method and equipment
  • TE (Traffic Engineering) tunnel establishing method and equipment
  • TE (Traffic Engineering) tunnel establishing method and equipment

Examples

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Embodiment Construction

[0041] In the present invention, routing devices in the MPLS network exchange link state information through link state messages, including RSVP-TE configuration attributes of link interfaces. The routing device generates TEDB based on the collected information. When the routing device initiates the establishment of a TE tunnel, CSPF cuts the links in the TEDB of the routing device, and selects the link configured with the RSVP-TE protocol on the interface to establish the TE tunnel.

[0042] OSPF (Open Shortest Path First) protocol or ISIS (Link State Routing Protocol) is configured on each routing device in the above-mentioned MPLS network. Correspondingly, the above-mentioned link state message is specifically an OSPF with TE extended attribute Each routing device sends and receives OSPF packets or ISIS packets with TE extended attributes according to the configured OSPF protocol or ISIS protocol.

[0043] The following describes how to establish a TE tunnel when the link ...

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Abstract

The invention discloses a TE (Traffic Engineering) tunnel establishing method and equipment. The method comprises the following steps: routing equipment and adjacent routing equipment mutually receive and send link state messages, wherein fields used for identifying RSVP-TE (Resource Reservation Protocol-Traffic Engineering) configuration properties of links are carried in the link state messages; the routing equipment collects link state information in an MPLS (Multiple Protocol Label Switching) network and forms a TEDB (Traffic Engineering Database) according to the link state messages; the routing equipment operates a CSPF (Constraint based Shortest Path First) algorithm, and selects a link configured with a RSVP-TE protocol in the TEDB; and the routing equipment establishes a TE tunnel according to the selected link. In the invention, the TE tunnel can also be normally established under the condition that an equivalent link exists in an MPLS network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and equipment for establishing a TE tunnel. Background technique [0002] In the current Internet network, network congestion is the main problem affecting the performance of the backbone network. TE (Traffic Engineering, traffic engineering) is a technical solution to solve network congestion. In order to deploy traffic engineering in a large-scale backbone network, MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching) TE is widely used. [0003] In an existing MPLS network, each device collects relevant information about TEs in a link and generates a TEDB (TE Data Base, TE database). CSPF (Constrained Shortest Path First, constrained shortest path first protocol) cuts the links in the TEDB, cuts out the links that do not meet the TE attribute requirements, and finds a shortest path. When there are multiple paths to the same destination or multiple e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/50
Inventor 朱坤
Owner NEW H3C TECH CO LTD
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