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Loose node in RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel and path calculation method of loose node

A technology of RSVP-TE and path calculation, applied in the field of data network communication, it can solve the problems of tunnel establishment, failure to establish successfully, etc., and achieve the effect of reducing the possibility of loops

Inactive Publication Date: 2012-08-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, there will be such a problem: when the tunnel is rebuilt, the above steps are repeated, and the tunnel cannot be established.
[0006] From the above analysis, it can be seen that there is no mechanism in the subsequent tunnel reconstruction process to automatically avoid such loop calculation results during the path calculation process of loose nodes, so that the tunnel is always in the process of path calculation, loop detection, and teardown. loop without being able to build a successful

Method used

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  • Loose node in RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel and path calculation method of loose node
  • Loose node in RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel and path calculation method of loose node
  • Loose node in RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel and path calculation method of loose node

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Embodiment

[0043] Such as figure 2 As shown, this embodiment provides a method for calculating a loose node path in an RSVP-TE tunnel, including:

[0044] S101: Each node in the RSVP-TE tunnel sends a PATH message carrying the router ID of the node to the downstream node;

[0045] In this embodiment, as a preferred manner, the router ID of the current node may be added to the excluded route object XRO of the PATH message.

[0046] In addition, expand the flag field in the SESSION ATTRIBUTE object of the PATH message, and define a new flag, such as 0x20, indicating that the router ID of the node needs to be automatically added to the XRO, so that when the downstream node receives the PATH message, it can update the PATH The SESSION ATTRIBUTE object of the message is identified to determine whether the router ID of this node needs to be automatically added to the XRO.

[0047] For example, when the head node in the RSVP-TE tunnel sends a PATH message to the downstream node, it automatic...

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Abstract

The invention discloses a path calculation method of a loose node in an RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel, the loose node, a non-loose node and the RSVP-TE network. The method comprises the following steps that: each node in the RSVP-TE network sends a PATH message carrying the router ID (Identifier) of the node to a downstream node; when the path of the loose node is calculated, the router ID is used as a constraint condition of path exclude to submit to CSPF (Constrained Shortest Path First) to calculate the path. The loose node comprises a receiving module, a path calculation module and a message generating module; the non-loose node comprises a message generating module and a sending module; and the RSVP-TE network comprises the loose node and the non-loose node. The local router ID of an upstream node is used as a constraint condition of the path exclude, so that the possibility of a loop generated when the path of the loose node is calculated is greatly reduced.

Description

technical field [0001] The present invention relates to the field of data network communication, in particular to a method for calculating the path of loose nodes in a traffic engineering-based Resource Reservation Protocol-Traffic Engineer (RSVP-TE) tunnel, loose nodes and non-loose nodes, and RSVP-TE network. Background technique [0002] RSVP-TE is a traffic engineering technology based on MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching). After RSVP is extended, it can support the distribution of MPLS labels, and carry resource reservation information while transmitting label binding messages. This extended RSVP is called RSVP-TE, and is used as a signaling protocol in MPLS TE LSP tunnels are established, and service traffic can be forwarded in TE tunnels (TE Tunnels) through the combined use of the four functions of information publishing, path calculation, signaling exchange (RSVP-TE), and data forwarding. [0003] The path calculation process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/721
Inventor 付志涛
Owner ZTE CORP
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