mpls-passive

Function

The mpls-passive command enables the egress node of an LSP to passively create a BFD session.

The undo mpls-passive command disables the egress node of an LSP from passively creating a BFD session.

By default, the egress node of an LSP cannot passively create a BFD session.

Format

mpls-passive

undo mpls-passive

Parameters

None

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a unidirectional LSP, the ingress node creates a BFD session, which triggers the sending of an LSP ping packet. After the egress node receives the ping packet, a BFD session can be automatically created on the egress node. Run the mpls-passive command to enable the BFD session to be created passively on the egress node of an LSP. If the feature is disabled, the egress node cannot automatically create a BFD session.

Prerequisites

BFD has been enabled globally using the bfd command.

Precautions

You need to run the mpls-passive command on the egress node. Then, the egress node can create a BFD session in an opposite direction after receiving an LSP ping request packet carrying a BFD TLV.

Example

# Enable the egress node of an LSP to automatically and passively create a BFD session.

<HUAWEI> system-view
[HUAWEI] bfd
[HUAWEI-bfd] mpls-passive