bit-error-detection (BFD session view)

Function

The bit-error-detection command enables bit-error-triggered SR-MPLS TE LSP switching.

The undo bit-error-detection command disables bit-error-triggered SR-MPLS TE LSP switching.

By default, bit-error-triggered switching is disabled for an SR-MPLS TE LSP.

Format

bit-error-detection

undo bit-error-detection

Parameters

None

Views

BFD session view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bfd	write

Usage Guidelines

Usage Scenario

SR-MPLS TE LSP establishment does not require protocols. Therefore, an SR-MPLS TE LSP can be established as long as a label stack is delivered. If an SR-MPLS TE LSP encounters bit errors, upper-layer services may be affected.

To cope with link bit errors along an SR MPLS-TE tunnel and reduce the impact of bit errors on services, run the bit-error-detection command to enable bit-error-triggered SR-MPLS TE LSP switching. After this function is enabled, service traffic is switched from the primary SR MPLS-TE LSP to the backup SR MPLS-TE LSP if bit errors occur.

Precautions

Before you run this command in the BFD session view, ensure that the session type is BFD for SR-MPLS TE LSP and this function is supported and enabled on the peer end. If a BFD session has been configured to detect bit errors for the SR-MPLS TE LSP, you must delete the related BFD configuration before changing the SR-MPLS TE LSP type to common LSP.

Bit error detection and association between BFD and CFM or EFM cannot be configured for the same BFD session.

Example

# Enable bit-error-triggered SR-MPLS TE LSP switching.

<HUAWEI> system-view
[~HUAWEI] bfd s1  bind mpls-te interface Tunnel1 te-lsp
[*HUAWEI-bfd-lsp-session-s1] bit-error-detection