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10.6 Configuring Bit-Error-Triggered RSVP-TE Tunnel
Switching
This section describes how to configure bit-error-triggered Resource Reservation Protocol-
Traffic Engineering (RSVP-TE) tunnel switching.
Usage Scenario
Bit errors caused by optical fiber aging or optical signal jitter may exist on carrier networks.
These bit errors may result in the interruption of services with high quality requirements. If a
network uses an RSVP-TE tunnel with traffic engineering (TE) hot-standby protection to carry
services, you can configure bit-error-triggered RSVP-TE tunnel switching to protect services
against bit errors.
Then, if a bit error event occurs, traffic switches between the primary and backup constraint-
based routed label switched paths (CR-LSPs) of the RSVP-TE tunnel based on the bit error status
of the CR-LSPs.
Pre-configuration Tasks
Before configuring bit-error-triggered RSVP-TE tunnel switching, complete the following tasks:
l
Configure two unidirectional RSVP-TE tunnels in opposite directions.
NOTICE
The
label advertise
non-null
command must be configured to enable each egress to
allocate a label to the penultimate hop.
l
Configure a TE hot-standby CR-LSP for each RSVP-TE tunnel (for details, see Configuring
CR-LSP Backup).
l
Enable Bidirectional Forwarding Detection (BFD) globally on the nodes along the primary
and backup CR-LSPs of each unidirectional RSVP-TE tunnel.
Procedure
Step 1
Run:
system-view
The system view is displayed.
Step 2
Run:
interface tunnel
interface-number
The tunnel interface view is displayed.
Step 3
Run:
mpls te bit-error-detection
[
mode
{
unidirectional
|
bidirectional
} ]
Bit-error-triggered protection switching is enabled for the current tunnel.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
10 Bit-Error-Triggered Protection Switching Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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