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This function supports two switching modes:
l
unidirectional
: In this mode, a bit error event triggers only the current tunnel to perform a
protection or revertive switching.
l
bidirectional
: In this mode, a bit error event triggers both the current tunnel and its reverse
tunnel to perform a protection or revertive switching.
The default mode is bidirectional switching.
Step 4
Run:
mpls te reverse-lsp
protocol
rsvp-te
ingress-lsr-id
ingress-lsr-id
tunnel-id
tunnel-id
The reverse tunnel for the current tunnel is specified.
Step 5
(Optional) Run:
mpls te bit-error-detection threshold
switch
switch-coe
switch-pow
resume
resume-
coe
resume-pow
The thresholds for bit-error-triggered protection switching and revertive switching are
configured.
The
switch-coe
parameter specifies the protection switching coefficient, and the
switch-pow
parameter specifies the protection switching power. The formula for calculating the threshold
for bit-error-triggered protection switching is as follows:
Protection switching threshold =
switch-coe
x 10
-
switch-pow
Similarly, the
resume-coe
parameter specifies the revertive switching coefficient, and the
resume-pow
parameter specifies the revertive switching power. The formula for calculating the
threshold for bit-error-triggered revertive switching is similar to the formula for calculating the
threshold for bit-error-triggered protection switching.
NOTE
The threshold for bit-error-triggered revertive switching must be lower than or equal to the threshold for
bit-error-triggered protection switching.
Step 6
Run:
mpls te commit
The configuration is committed.
----End
Checking the Configurations
After configuring bit-error-triggered Resource Reservation Protocol-Traffic Engineering
(RSVP-TE) tunnel switching, check information about the bit error detection session, constraint-
based routed label switched path (CR-LSP) bit error status, and CR-LSP bit error rate (BER).
Run the
display bfd bit-error-detection session
all
command. The command output shows
information about all bit error detection sessions.
<HUAWEI>
display bfd bit-error-detection session all
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session MIndex : 256
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.
1012