No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


NE40E V800R010C00 Configuration Guide - MPLS 01

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring CR-LSP Backup

Configuring CR-LSP Backup

CR-LSP backup is configured to provide end-to-end protection for a CR-LSP.

Usage Scenario

CR-LSP backup provides an end-to-end path protection for an entire CR-LSP.

A backup CR-LSP is established in either of the following modes:

  • Hot-standby mode: A backup CR-LSP and a primary CR-LSP are created simultaneously.

  • Ordinary backup mode: A backup CR-LSP is created only after a primary CR-LSP fails.

The paths of backup CR-LSPs in the preceding modes are different:

  • Hot standby mode: The path of a backup CR-LSP and the path of a primary CR-LSP overlap only if the backup CR-LSP is established over an explicit path.

  • Ordinary backup mode: The path of a backup CR-LSP and the path of a primary CR-LSP overlap in any cases.

Hot standby supports best-effort paths. If both the primary and backup CR-LSPs fail, a temporary path, called a best-effort path, is established. All traffic switches to this path. In Figure 3-13, the path of the primary CR-LSP is PE1 -> P1 -> PE2, and the path of the backup CR-LSP is PE1 -> P2 -> PE2. If both the primary and backup CR-LSPs fail, the node triggers the setup of a best-effort path along the path PE1 -> P2 -> P1 -> PE2.

Figure 3-13  Schematic diagram for a best-effort path

Pre-configuration Tasks

Before configuring CR-LSP backup, complete the following tasks:

Configuration Procedures

Figure 3-14  CR-LSP backup configuration
Updated: 2018-07-12

Document ID: EDOC1100028530

Views: 102512

Downloads: 336

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Previous Next