mldp make-before-break timer switch-delay

Function

The mldp make-before-break timer switch-delay command sets the timer for delaying the MBB LSP switching.

The undo mldp make-before-breaktimer switch-delay command restores the default delay timer.

The default timer is 100 ms.

Format

mldp make-before-break timer switch-delay switch-delay-time-value

undo mldp make-before-break timer switch-delay [ switch-delay-time-value ]

Parameters

Parameter	Description	Value
switch-delay-time-value	Sets the timer for delaying an MBB LSP switchover.	The value is an integer ranging from 100 to 600000, in ms.

Parameter

Description

Value

switch-delay-time-value

Sets the timer for delaying an MBB LSP switchover.

The value is an integer ranging from 100 to 600000, in ms.

Views

MPLS-LDP view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mpls-ldp	write

Usage Guidelines

Usage Scenario

On an mLDP P2MP network, an MBB LSP is established on the control plane before a downstream node sends forwarding entries to the forwarding lane. To ensure traffic switching, the downstream node needs to delay the process on the control plane to ensure that the forwarding plane receives forwarding entries mapped to the MBB LSP. To set the delay timer, run the mldp make-before-break timer switch-delay command.

Prerequisites

MBB has been enabled using the mldp make-before-break command in the MPLS-LDP view.

Precautions

In network deployment, the timer for delaying the MBB LSP switching configured using the mldp make-before-break timer wait-ack command on a local node must be longer than the sum of such timers configured on all devices existing between the root node and the local device.

Example

# Set the timer for delaying an MBB LSP switchover to 240 ms.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls ldp
[*HUAWEI-mpls-ldp] mldp p2mp
[*HUAWEI-mpls-ldp] mldp make-before-break
[*HUAWEI-mpls-ldp] mldp make-before-break timer switch-delay 240