On-Demand Mode for SLA Measurement
In on-demand mode, the measurements are triggered by the user through the CLI.
When the user triggers the delay measurement through the CLI, the delay measurement
request that is generated is as per the frame formats specified by the ITU-T Y.1731
standard. For two-way delay measurement, the server-side processing can be delegated
to the Packet Forwarding Engine to prevent overloading on the Routing Engine. For more
information, see Configuring Routers to Support an ETH-DM Session. When the server-side
processing is delegated to the Packet Forwarding Engine, the delay measurement message
(DMM) frame receive counters and delay measurement reply (DMR) frame transmit
counters are not displayed by the show command.
When the user triggers the loss measurement through the CLI, the router sends the
packets in standard format along with the loss measurement TLV. By default, the
session-id-tlv argument is included in the packet to allow concurrent loss measurement
sessions from same local MEP. You can also disable the session ID TLV by using the
no-session-id-tlv argument.
Single-ended ETH-LM is used for on-demand operation, administration, and maintenance
purposes. An MEP sends frames with ETH-LM request information to its peer MEP and
receives frames with ETH-LM reply information from its peer MEP to carry out loss
measurements. The protocol data unit (PDU) used for a single-ended ETH-LM request
is referred to as a loss measurement message (LMM) and the PDU used for a single-ended
ETH-LM reply is referred to as a loss measurement reply (LMR).
Related
Documentation
Ethernet Frame Delay Measurements Overview•
• Ethernet Frame Loss Measurement Overview on page 1121
• Proactive Mode for SLA Measurement on page 1123
• Configuring Routers to Support an ETH-DM Session.
• Ethernet Interfaces Feature Guide for Routing Devices
Configuring MEP Interfaces to Support Delay Measurement
Before you can start an Ethernet frame delay measurement (ETH-DM) session across
an Ethernet service, you must configure two ACX Series routers to support ETH-DM.
To configure an Ethernet interface on a ACX Series router to support ETH-DM:
1.
On each router, configure two physical or logical Ethernet interfaces connected by a
VLAN. The following configuration is typical for single-tagged logical interfaces:
[edit interfaces]
interface {
ethernet-interface-name {
vlan-tagging;
unit logical-unit-number {
vlan-id vlan-id; # Both interfaces on this VLAN
1125Copyright © 2017, Juniper Networks, Inc.
Chapter 34: Configuring Operations, Administration, and Management (OAM)
To Next Page
Loading...
Need help?
General
