delay-measure one-way

Function

The delay-measure one-way command enables one-way on-demand frame delay measurement (DM).

By default, one-way on-demand frame DM is disabled.

Format

delay-measure one-way [ interval { 1000 | 10000 } | count count-value | exp exp-value ] ^*

Parameters

Parameter	Description	Value
interval	Specifies an interval at which delay measurement messages (DMMs) are sent.	The value is either 1000 or 10000, in milliseconds. The default value is 1000.
count count-value	Specifies the number of DMMs to be sent.	The value is an integer ranging from 1 to 60. The default value is 5.
exp exp-value	Specifies a priority for DMMs.	The value is an integer ranging from 0 to 7. A larger value indicates a higher priority. The default value is 7.

Parameter

Description

Value

interval

Specifies an interval at which delay measurement messages (DMMs) are sent.

The value is either 1000 or 10000, in milliseconds. The default value is 1000.

count count-value

Specifies the number of DMMs to be sent.

The value is an integer ranging from 1 to 60. The default value is 5.

exp exp-value

Specifies a priority for DMMs.

The value is an integer ranging from 0 to 7. A larger value indicates a higher priority. The default value is 7.

Views

Maintenance entity group view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
tpoam	write

Usage Guidelines

Usage Scenario

DM is an MPLS-TP performance monitoring function. One-way frame DM and two-way frame DM are supported.

To enable on-demand one-way frame DM, run the delay-measure one-way command.
To enable on-demand two-way frame DM, run the delay-measure two-way command.
One-way frame DM is implemented between two MEPs in a MEG by exchanging DMMs. After the delay-measure one-way command is run, the MEP periodically sends DMMs carrying the T x TimeStampf value. After the RMEP receives a DMM, it subtracts the T x TimeStampf value from the RxTimef value to calculate the delay.
Frame delay = R x Timef - T x TimeStampf

Prerequisites

The ME of the MEG has been bound to a tunnel.

Example

# Configure a device to send 10 one-way DMMs with a priority of 1 in a MEG named test.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] interface GigabitEthernet 0/1/0.1
[*HUAWEI-GigabitEthernet0/1/0.1] vlan-type dot1q 1
[*HUAWEI-GigabitEthernet0/1/0.1] mpls static-l2vc destination 4.4.4.4 400 transmit-vpn-label 100 receive-vpn-label 200
[*HUAWEI-GigabitEthernet0/1/0.1] quit
[*HUAWEI] mpls-tp meg test
[*HUAWEI-mpls-tp-meg-test] me l2vc peer-ip 4.4.4.4 vc-id 400 vc-type vlan mep-id 1 remote-mep-id 2
[*HUAWEI-mpls-tp-meg-test] commit
[~HUAWEI-mpls-tp-meg-test] delay-measure one-way count 10 exp 1