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Resource reservation protocol tunnel management method based on flow rate engineering and system thereof

A technology of resource reservation protocol and traffic engineering, which is applied in the field of improving the reliability of resource reservation protocol tunnels, can solve problems not mentioned, and achieve the effects of avoiding impact and improving stability and reliability

Inactive Publication Date: 2010-02-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0045] For the situation where OSPF-TE and ISIS-TE environments coexist in this network, the IETF has not yet mentioned a technical solution to solve the above problems

Method used

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  • Resource reservation protocol tunnel management method based on flow rate engineering and system thereof
  • Resource reservation protocol tunnel management method based on flow rate engineering and system thereof
  • Resource reservation protocol tunnel management method based on flow rate engineering and system thereof

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Embodiment Construction

[0083] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0084] At the tunnel head node, RSVP-TE will request OSPF-TE or ISIS-TE to perform CSPF calculation, and encapsulate the calculated path in the ERO object. The ERO object is sent downstream along with the PATH message, and the downstream receives the PATH message. Afterwards, the routing table is not checked, but the PATH message is sent downstream according to the path information in the ERO object. In an environment where OSPF-TE and ISIS-TE coexist, when the TE topology changes, both OSPF-TE and ISIS-TE will notify RSVP-TE, because the tunnel intermediate node does not know that the tunnel LSP is based on OSPF-TE The TE topology is calculated based on the TE topology of ISIS-TE, so the RSVP-TE of the intermediate node will respond to ...

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Abstract

The invention discloses a resource reservation protocol tunnel management method based on flow rate engineering, solving the technical problem that irrelevant IGP TE topology change information affects a RSVP-TE tunnel under the condition that a plurality of IGP TE topology domains in a network. The method comprises the following steps of: spreading a new object in PATH information; recording IGPTE topology information when computing CSPF by the object; after receiving the PATH information by downstream equipment, binding the IGP TE topology information in the information and an interface corresponding to the tunnel; and when receiving the TE topology change information announced by the IGP, comparing the IGP TE topology information recoded on the tunnel with the information in the topology change information to decide whether the tunnel needs to respond to the IGP TE topology change information. The invention can prevent the irrelevant IGP TE topology change information from affecting the RSVP-TE tunnel, thereby improving the stability and the reliability of the tunnel.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a method for improving the reliability of Resource Reservation Protocol (RSVP-TE, Resource ReServation Protocol-Traffic Engineering) tunnels in Multi-Protocol Label Switching Traffic Engineering (MPLS TE, Multi-Protocol Label Switch Traffic Engineering) sexual method. Background technique [0002] Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching) is a new generation IP high-speed backbone network switching standard, proposed by the Internet Engineering Task Force (IETF, Internet Engineering Task Force). MPLS technology provides a complete separation of the routing layer and the forwarding layer, and has the advantages of fast forwarding, quality of service (QoS) guarantee, multi-service support, etc. It has achieved considerable development and is playing an increasingly important role in the next-generation telecom network . [0003] The key of MPL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L47/724
Inventor 何强
Owner ZTE CORP
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