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Multi-protocol label switch forwarding method, device and label switching path management module

A technology of label switching paths and multi-protocol labels, which is applied in data switching networks, digital transmission systems, electrical components, etc., and can solve the problems of reducing MPLS network forwarding stability and MPLS traffic forwarding interruption, and achieves the goal of reducing MPLS forwarding traffic interruption. probability, simple and convenient implementation, and the effect of improving forwarding stability

Active Publication Date: 2008-04-09
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if PE1 wants to send MPLS packets to PE2, no static LSP will be found, which will cause the interruption of MPLS traffic forwarding between PE1 and PE2, reducing the forwarding stability of the MPLS network.

Method used

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  • Multi-protocol label switch forwarding method, device and label switching path management module
  • Multi-protocol label switch forwarding method, device and label switching path management module
  • Multi-protocol label switch forwarding method, device and label switching path management module

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Fig. 2 provides the flow chart of forwarding message in the MPLS network that adopts static LSP to construct for the embodiment of the present invention, as shown in Fig. 2, its specific steps are as follows:

[0033] Step 201: Prepare to deliver static LSP configuration to the LSPM module.

[0034] The LSPM module is a module dedicated to managing LSPs, and may be located on an LSR, a Label Edge Router (LER, Label Edge Router), etc.

[0035] Step 202: Determine whether there is more than one link between the current node to configure the static LSP and the next node, if yes, perform step 205; otherwise, perform step 203.

[0036] Step 203: Include the inbound interface ID and / or outbound interface ID corresponding to the link, and the current node ID to configure the static LSP in the static LSP establishment notification, an...

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Abstract

The invention discloses a multi protocol label switching (MPLS) retransmission method and a device, as well as a label switching path management (LSPM) module. The method comprises if it is detected that there are one main link and at least one backup link between a node to a next node, interface inlets and / or interface outlets corresponding to each link are respectively allocated to a static label switching path (LSP), and an interface inlet and / or interface outlet corresponding to the main link is used as a retransmission interface; if a main link failure is detected, an available backup link is selected, and an interface inlet and / or interface outlet corresponding to the selected backup link is used as a retransmission interface in the static LSP; and a MPLS message is retransmitted according to the interface inlet and / or interface outlet used as the retransmission interface in the LSP. The invention improves the retransmission stability of MPLS network adopting static LSP.

Description

technical field [0001] The invention relates to the technical field of data forwarding, in particular to a multi-protocol label switching forwarding method and device and a label switching path management module. Background technique [0002] Internet Protocol (IP, Internet Protocol) / Multiprotocol Label Switching (MPLS, MultiProtocol Label Switching) technology has become an important deployment means of the current core network, and the core of MPLS is label distribution. In order to implement label distribution, a Label Switched Path (LSP, LabelSwitched Path) needs to be established. LSP is divided into two types: static LSP and dynamic LSP. Among them, dynamic LSP is a label distribution protocol between upstream nodes and downstream nodes, such as: Label Distribution Protocol (LDP, LabelDistribution Protocol), LDP based on constraint routing (CR-LDP, Constraint-BasedRouting using LDP), Border Gateway Protocol (BGP, Border Gateway Protocol), Resource Reservation Protocol...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L45/50
Inventor 程锋章刘小龙
Owner NEW H3C TECH CO LTD
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