bfd enable (Segment routing view)

Function

The bfd enable command enables bidirectional forwarding detection (BFD) for SR-MPLS BE tunnels created by the SEGR module.

The undo bfd enable command disables BFD for SR-MPLS BE tunnels created by the SEGR module.

By default, this function is disabled.

bfd enable mode tunnel [ [ filter-policy ip-prefix ip-prefix-name ] | [ effect-sr-lsp ] | [ nil-fec ] ] ^*

undo bfd enable mode tunnel [ [ filter-policy ip-prefix ip-prefix-name ] | [ effect-sr-lsp ] | [ nil-fec ] ] ^*

Parameter	Description	Value
filter-policy	Indicates a filter policy.	-
ip-prefix ip-prefix-name	Specifies an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
effect-sr-lsp	Specifies whether to affect the SR LSP. If the effect-sr-lsp parameter is specified, if BFD Down, SEGR module cancels the SR LSP.	-
nil-fec	Specifies whether to use nil FEC. In an SR and LDP interworking scenario, the ingress node cannot detect whether LDP LSPs are stitched to SR LSPs in the LDP to SR direction. In the LSP ping packet triggered by BFD, the encapsulated FEC type is LDP. When the packet arrives at the egress node (SR node), the FEC type fails to be verified, preventing BFD from going Up. To resolve this issue, configure the nil-fec parameter.	-
mode	Indicates BFD mode.	-
tunnel	Indicates SR-MPLS BE tunnels.	-

Segment routing view

2: Configuration level

Task Name	Operations
segr	write

Usage Scenario

To enable BFD for SR-MPLS BE tunnels created by the SEGR module, run the bfd enable command, which improves reliability.

Prerequisites

BFD has been enabled using the bfd command.

# Enable BFD for SR-MPLS BE tunnels created using the SEGR module.

<HUAWEI> system-view
[~HUAWEI] bfd
[*HUAWEI-bfd] quit
[*HUAWEI] segment-routing
[*HUAWEI-segment-routing] bfd enable mode tunnel