guard-timer

Function

The guard-timer command sets the Guard timer of an ERPS ring.

The undo guard-timer command restores the default value of the Guard timer.

By default, the Guard timer is 200 centiseconds for the ERPS ring.

Format

guard-timer time-value

undo guard-timer

Parameters

Parameter	Description	Value
time-value	Specifies the value of the Guard timer for the ERPS ring.	The value is an integer ranging from 1 to 200, in centiseconds.

Parameter

Description

Value

time-value

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

The value is an integer ranging from 1 to 200, in centiseconds.

Views

ERPS ring view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
erps	write

Usage Guidelines

Usage Scenario

After a faulty link or node recovers, the nodes on the two ends of the link or the faulty node sends ring auto protection switching (R-APS) protocol data units (PDUs) to inform the other nodes of the link or node recovery and starts a Guard timer. Before the timer expires, each involved node does not receive any R-APS PDU to avoid receiving out-of-date R-APS PDUs indicating that the link or node fails. If the involved node receives an RAPS packet indicating that another port fails, the local port enters the Forwarding state.

Precautions

If the value of the Guard timer is set too small, network loops will occur. The default value is recommended.

Example

# Set the Guard timer to 100 centiseconds for ERPS ring 10.

<HUAWEI> system-view
[~HUAWEI] erps ring 10
[*HUAWEI-erps-ring10] guard-timer 100