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

Reminder

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

upgrade

NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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 a Tunnel Protection Group

Configuring a Tunnel Protection Group

This section describes how to configure a tunnel protection group. A protection tunnel can be bound to a working tunnel to form a tunnel protection group. If the working tunnel fails, traffic switches to the protection tunnel. The tunnel protection group helps improve tunnel reliability.

Usage Scenario

A tunnel protection group provides end-to-end protection for traffic transmitted along TE tunnel. If a working tunnel fails, bidirectional automatic protection switching switches traffic to a protection CR-LSP.

NOTE:

In an MPLS OAM for associated or co-routed LSP scenario where tunnel APS is configured, if the primary and backup tunnels use the same path and the path fails, both the tunnels are affected, and services may be interrupted.

A protected tunnel is called a working tunnel. A tunnel that protects the working tunnel is called a protection tunnel. The working and protection tunnels form a tunnel protection group. A tunnel protection group works in 1:1 mode. In 1:1 mode, one protection tunnel protects only one working tunnel.

  • Working and protection tunnels

    Tunnel-specific attributes in a tunnel protection group are independent from each other. For example, a protection tunnel with bandwidth 50 Mbit/s can protect a working tunnel with 100 Mbit/s bandwidth.

    TE FRR can be enabled to protect the working tunnel.

    A protection tunnel cannot be protected by other tunnels or have TE FRR enabled.

  • Protection switching mechanism

    The NE20E performs protection switching based on the following rules.

    Table 3-10 Switching rules

    Switching Request

    Priority

    Description

    Clear

    Highest

    Clears all switching requests initiated manually, including forcible and manual switch requests. A signal failure will trigger traffic switching.

    Lockout of protection

    Prevents traffic from switching to a protection tunnel even if a working tunnel fails.

    Signal Fail for Protection

    Switches traffic from a protection tunnel to a working tunnel if the protection tunnel fails.

    Forcible switch

    Forcibly switches traffic from a working tunnel to a protection tunnel, regardless of whether the protection tunnel functions properly (unless a higher priority switch request takes effect).

    Signal Fail for Working

    Switches traffic from a working tunnel to a protection tunnel if the working tunnel fails.

    Manual switch

    Switches traffic from a working tunnel to a protection tunnel only when the protection tunnel functions properly or switches traffic from the protection tunnel to the working tunnel only when the working tunnel functions properly.

    Wait to restore

    Switches traffic from a protection tunnel to a working tunnel after the working tunnel recovers, which happens after the wait-to-restore (WTR) timer elapses.

    No request

    Lowest

    There is no switching request.

Pre-configuration Tasks

Before configuring a tunnel protection group, create a working tunnel and a protection tunnel.

NOTE:
  • A tunnel protection group uses a configured protection tunnel to protect a working tunnel, which improves tunnel reliability. Configuring working and protection tunnels over separate links is recommended.

  • The working and protection tunnels must be bidirectional. The following types of bidirectional tunnels are supported:

    • Static bidirectional associated LSPs

    • Dynamic bidirectional associated LSPs

    • Static bidirectional co-routed LSPs

Translation
Download
Updated: 2019-01-03

Document ID: EDOC1100055103

Views: 19763

Downloads: 35

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