The mpls te bit-error-detection threshold command sets the thresholds for bit-error-triggered RSVP-TE tunnel protection switching and revertive switching.
The undo mpls te bit-error-detection threshold command deletes the thresholds for bit-error-triggered RSVP-TE tunnel switching and revertive switching.
By default, an RSVP-TE tunnel does not have thresholds for bit-error-triggered RSVP-TE tunnel switching and revertive switching.
| Parameter | Description | Value |
|---|---|---|
| switch-pow |
Specifies the threshold for bit-error-triggered RSVP-TE tunnel protection switching. |
The value is an integer ranging from 1 to 7. |
| resume resume-coe |
Specifies the threshold for bit-error-triggered RSVP-TE tunnel revertive switching. The formula for calculating the threshold is as follows: Revertive switching threshold = (resume-coe) x 10-resume-pow. The revertive switching threshold cannot be greater than the protection switching threshold. |
The value is an integer ranging from 1 to 9. |
| resume-pow |
Specifies the threshold for bit-error-triggered RSVP-TE tunnel revertive switching. |
The value is an integer ranging from 1 to 7. |
| switch switch-coe |
Specifies the threshold for bit-error-triggered RSVP-TE tunnel protection switching. The formula for calculating the threshold is as follows: Protection switching threshold = (switch-coe) x 10-switch-pow. |
The value is an integer ranging from 1 to 9. |
Usage Scenario
To precisely control bit-error-triggered RSVP-TE tunnel switching based on the sensitivity of services to bit errors, configure the thresholds for bit-error-triggered RSVP-TE tunnel protection switching and revertive switching on a tunnel interface.
Then, the ingress of an RSVP-TE tunnel determines the bit error status of the primary and backup CR-LSPs based on the following rules: If the BER of a CR-LSP reaches or exceeds the threshold for bit-error-triggered RSVP-TE tunnel protection switching, the CR-LSP is in the excessive BER state. After the BER of the CR-LSP falls below the threshold for bit-error-triggered RSVP-TE tunnel revertive switching, the CR-LSP changes to the normalized BER state. Bit error refers to the deviation between a bit that is sent and the bit that is received. BER is the number of bit errors divided by the total number of transferred bits during a specified period. The BER of a CR-LSP is calculated based on the BER of each section on a CR-LSP.Prerequisites
The mpls rsvp-te command has been run in the MPLS view to enable RSVP-TE.
<HUAWEI> system-view [~HUAWEI] mpls [*HUAWEI-mpls] mpls te [*HUAWEI-mpls] mpls rsvp-te [*HUAWEI-mpls] quit [*HUAWEI] interface Tunnel 10 [*HUAWEI-Tunnel10] tunnel-protocol mpls te [*HUAWEI-Tunnel10] mpls te bit-error-detection threshold switch 8 2 resume 4 2