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5.4 Configuring the Two-way Frame Delay Measurement in
a VLAN
You can configure the two-way frame delay measurement in the VLAN bound to an MA and
estimate the quality of services based on the calculated two-way frame delay.
5.4.1 Establishing the Configuration Task
Before configuring the two-way frame delay measurement, familiarize yourself with the
applicable environment, complete the pre-configuration tasks, and obtain the required data. This
can help you complete the configuration task quickly and accurately.
Applicable Environment
You can configure the two-way frame delay measurement to collect statistics about the delay in
bidirectional service traffic transmission.
The two-way frame delay measurement is commonly performed on end-to-end MEPs. After a
remote MEP receives a DMM frame from a local MEP, the remote MEP adds the RxTimeStampf
value (timestamp at the time of receiving the DMM frame) to the DMM frame, generates a DMR
frame with the TxTimeStampb value, and sends the message to the local MEP. Every field in
the DMM frame is copied to the DMR frame except that the source and destination MAC
addresses are swapped and the message type is changed from DMM to DMR. Upon receiving
the DMR frame, the local MEP calculates the two-way frame delay based on the timestamps.
NOTE
Before enabling the two-way delay measurement in the VLAN on the local device, you must configure the
DMM frame reception function on the remote device.
Pre-configuration Tasks
Before configuring the two-way delay measurement in the VLAN, complete the following tasks:
l
Configuring VLAN, For the configuration procedure, see VLAN Configuration
l
4.8 Configuring Basic Ethernet CFM
Data Preparation
To configure the two-way delay measurement in the VLAN, you need the following data:
No.
Data
1
Names of the MD and MA
2
ID of the MEP, name of the interface on which the MEP resides, and type of the MEP
3
Name of the VLAN bound to the MA
4
(Optional) Alarm threshold of the two-way frame delay measurement
Quidway S3700 Series Ethernet Switches
Configuration Guide - Reliability
5 ITU-T Recommendation Y.1731 Configuration
Issue 01 (2011-10-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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