wtr-timer

Function

The wtr-timer command sets the wait to restore (WTR) timer of an ERPS ring.

The undo wtr-timer command restores the default value of the WTR timer.

By default, the WTR timer is 5 minutes for the ERPS ring.

Format

wtr-timer time-value

undo wtr-timer

Parameters

Parameter	Description	Value
time-value	Specifies the value of the WTR timer for the ERPS ring.	The value is an integer ranging from 1 to 12, in minutes.

Parameter

Description

Value

time-value

Specifies the value of the WTR timer for the ERPS ring.

The value is an integer ranging from 1 to 12, in minutes.

Views

ERPS ring view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
erps	write

Usage Guidelines

Usage Scenario

On a Layer 2 network running ERPS, if the RPL owner port is unblocked owning to a link or node failure, the involved port may not go Up immediately after the link or node recovers. Run the wtr-timer command can prevent the RPL owner port alternates between the Up and Down states. The node where the RPL owner port resides starts a WTR timer after receiving a ring auto protection switching (R-APS) PDU indicating the link or node recovery. If the node receives an R-APS PDU indicating that another port fails before the timer expires, it terminates the WTR timer. If the node does not receive any R-APS PDU indicating that another port fails before the timer expires, it unblocks the RPL owner port when the timer expires and sends an R-APS PDU indicating that the RPL owner port is blocked. After receiving this R-APS PDU, the other nodes set their ports on the ring to the Forwarding state.

Example

# Set the value of the WTR timer to 10 minutes for ERPS ring 10.

<HUAWEI> system-view
[~HUAWEI] erps ring 10
[*HUAWEI-erps-ring10] wtr-timer 10