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Method for controlling label notice message and maintaining LSP (Label Switching Path), and LSR (Label Switching Router)

A technology of notification messages and labels, applied in the direction of digital transmission systems, electrical components, transmission systems, etc., can solve the problem of not completely solving the actual needs of LDP networks, and achieve the effect of realizing control and enhancing versatility

Active Publication Date: 2012-04-11
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] As can be seen from the foregoing, the prior art only discloses an upstream and downstream LSP control block state machine processing process in the DU and ordered mode in the ATM LSR network, which cannot fully solve the actual needs of the LDP network application environment. Realize control label advertisement message and maintain LSP

Method used

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  • Method for controlling label notice message and maintaining LSP (Label Switching Path), and LSR (Label Switching Router)
  • Method for controlling label notice message and maintaining LSP (Label Switching Path), and LSR (Label Switching Router)
  • Method for controlling label notice message and maintaining LSP (Label Switching Path), and LSR (Label Switching Router)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment introduces the state machine processing flow of the USCB.

[0031] Table 3 is a list of USCB states, events, and actions. The first row of Table 3 shows the 4 different states of USCB, the first column shows the 6 possible events, and the rest are executed after different events occur in different states Actions (including 6 types, namely U-A0 to U-A5). For example, the content shown in the second column of Table 3 is: when the USCB is in the IDLE state, if the event U-E0 occurs, the action U-A0 is executed; if the event U-E2 or U-E4 occurs, the action U- A4; if event U-E5 occurs, then action U-A2 is executed; if event U-E1 or U-E3 occurs, no action is executed.

[0032]

[0033] Table 3-USCB state, event and action corresponding relationship list

[0034] Table 4 shows the contents and descriptions of the above 7 events.

[0035]

[0036] Table 4-7 events of USCB

[0037] Table 5 shows the contents of the above 6 actions.

[0038]

[0039]

[0040] Table 5-6 ac...

Embodiment 2

[0056] This embodiment introduces the state machine processing flow of DSCB.

[0057] Table 6 is a list of the status, events, and actions of DSCB. The first row of Table 6 shows the 2 different states of DSCB. The first column shows the 6 events that may occur, and the rest are executed after different events occur in different states. Actions (including 8 types, namely D-A0 to D-A7). For example, the content displayed in the second column of Table 6 is: when DSCB is in IDLE state, if event D-E0 or D-E4 occurs, then action D-A0 is executed; if event D-E1 occurs, then action D- A1; if event D-E2 or D-E3 occurs, action D-A2 is executed; if event D-E5 occurs, no action is executed.

[0058]

[0059] Table 6-Correspondence list of status, events and actions of DSCB

[0060] Table 7 shows the content and description of the above six events.

[0061]

[0062]

[0063] Table 7-6 events of DSCB

[0064] Table 8 shows the contents of the above 8 actions.

[0065]

[0066] Table 8-8 actions of...

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Abstract

The invention provides a method for controlling a label notice message and maintaining an LSP (Label Switching Path), and an LSR (Label Switching Router). In the method, a state machine processing flow of a downstream LSP control block (DSCB) in the LDP (Label Distribution Protocol) network environment is set, so that the universality of the state machine is enhanced, practical requirements in the LDP network environment can be satisfied, and control of the label notice message and maintenance of the LSP are both realized.

Description

Technical field [0001] The present invention relates to the technical field of Label Distribution Protocol (LDP, Label Distribution Protocol), in particular to a method for controlling label announcement messages and maintaining a Label Switching Path (LSP) and a Label Switching Router (LSR). Background technique [0002] In a Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching) network, LDP is the most widely used label distribution protocol for MPLS. Under normal circumstances, LDP adopts the label advertisement mode, that is, the Downstream Unsolicited (DU) mode is adopted to advertise labels to the upstream hop by hop to establish LSP. [0003] There are four main types of label notification messages in the LDP protocol, including: LDP LabelRequest message, LDP Label Mapping message, LDP Label Withdraw message, and LDP label release message (LDP LabelRelease message). LDP neighboring devices send corresponding label notification messages to announce and revok...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/58H04L45/50
Inventor 王蕊叶金荣杨霞
Owner NEW H3C TECH CO LTD
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