Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 817

NOTE: The Ethernet frame delay measurement feature is supported only for
maintenance association end points configured on Ethernet physical or logical
interfaces on DPCs in MX Series routers. The ETH-DM feature is not supported on
aggregated Ethernet interfaces or LSI pseudowires.
For specific information about configuring routers to support ETH-DM, see "Guidelines
for Configuring Routers to Support an ETH-DM Session" on page 745 and "Configuring
Routers to Support an ETH-DM Session" on page 753.
ETH-DM Session Parameters
You can initiate a one-way or two-way ETH-DM session by entering the
ethernet delay-measurement
of the service for which you want to measure frame delay. The command options
specify the ETH-DM session in terms of the CFM elements:
For more detailed information about the parameters you can specify to start an
ETH-DM session, see the
description in the JUNOS System Basics and Services Command Reference.
operational command at a router that contains one end
The type of ETH-DM measurement (one-way or two-way) to be performed.
The Ethernet service for which the ETH-DM measurement is to be performed:
CFM maintenance domain—Name of the existing maintenance domain (MD)
for which you want to measure Ethernet frame delays. For more information,
see "Creating the Maintenance Domain" on page 705.
CFM maintenance association—Name of an existing maintenance association
(MA) within the maintenance domain. For more information, see "Creating
a Maintenance Association" on page 708.
Remote CFM maintenance association end point—The unicast MAC address
or the numeric identifier of the remote maintenance association end point
(MEP)—the physical or logical interface on the remote router that resides in
the specified MD and is named in the specified MA—with which to perform
the ETH-DM session. For more information, see "Configuring a Maintenance
Endpoint" on page 709 and Configuring a Remote Maintenance End Point.
Optional specifications:
Count—You can specify the number of ETH-DM requests to send for this
frame delay measurement session. The range is from 1 through
65,535 frames. The default value is 10 frames.
Although you can trigger frame delay collection for up to
NOTE:
65,535 ETH-DM requests at a time, a router stores only the last 100 frame
delay statistics per CFM session (pair of peer MEPs).
Frame interval—You can specify the number of seconds to elapse between
ETH-DM frame transmittals. The default value is 1 second.
monitor ethernet delay-measurement
Chapter 44: Configuring ITU-T Y.1731 Ethernet Service OAM
Guidelines for Starting an ETH-DM Session
monitor
operational command
747