Node restarting method on universal multi protocol label exchange path

A label switching path and general multi-protocol technology, applied in the field of optical network, can solve problems such as LSP cannot be recovered, achieve the effect of improving recovery ability and avoiding recovery failure

Inactive Publication Date: 2006-07-12
陈丽萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] The purpose of the present invention is to provide a method for node restart and recovery on a general multi-protocol label switching path, to overcome the problem in

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  • Node restarting method on universal multi protocol label exchange path
  • Node restarting method on universal multi protocol label exchange path
  • Node restarting method on universal multi protocol label exchange path

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Example Embodiment

[0060] The core of the present invention is that when a node restarts on an LSP (Label Switching Path), a good neighbor node starts a synchronous recovery timer (Restore_timer) after receiving the HELLO message sent by the restarted node, and makes it The timeout period is the same as the timeout period of the recovery timer (Recovery_Timer) started on the restarted node. Like this, before the Restore_timer timer expires, if still do not receive refresh message from restarted neighbor node to local state block: PSB (path state block) or RSB (reserved state block), then continue to make state block Perform self-refresh; only after the Restore_timer timer expires, follow the normal status block (PSB or RSB) timeout process for processing. In this way, it is ensured that multiple nodes on an LSP are restarted, and when the adjacent nodes of the restarted node have not completed the restart, the refresh timeout will not be caused and the recovery will fail.

[0061] Those skilled...

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Abstract

Present invention discloses node restart resumptive method in universal multi - protocol label exchange route, Said method includes normal neighbor node receiving restart nodal HELLO response message response message, start-up synchronizing recover timer, when synchronizing recover timer not overtime , said normal neighbor node proceeding self refresh, in self refresh course , transmitting retrieval RSVP messages to restart node, restart node recovering its state piece, when normal neighbor and restart node synchronizing recovering completed or synchronizing recovering timer overtime, to stop synchronizing recovering timer, Said invention can ensure right recovering said label exchange route after multi - node restart in a stick of label exchange route, raises recovering ability of intelligent optical network control plain.

Description

technical field [0001] The invention relates to the technical field of optical networks, in particular to a method for restarting and recovering nodes on a universal multi-protocol label switching path. Background technique [0002] At present, due to the dual drive of the bandwidth demand generated by the rapid growth of IP (Internet Protocol) services and the new bandwidth utilization mode introduced by WDM technology, the suddenness and uncertainty of IP services require dynamic allocation of network bandwidth. The traditional static optical transmission network is difficult to meet the demand, resulting in the intelligent optical network. The intelligent optical network directly introduces the intelligent control technology with IP as the core on the optical fiber network, which can effectively support the dynamic establishment and removal of connections, reasonably allocate network resources on demand based on traffic engineering, and provide good network protection / res...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/54
CPCH04L47/825H04L45/28H04L47/724H04L47/746H04L45/00H04L12/5695H04L45/50H04L47/70
Inventor 蔡军州
Owner 陈丽萍
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