Scenarios For Configuration Of Eth-Slm; Upstream Mep In Mpls Tunnels; Downstream Mep In Ethernet Networks - Juniper ACX1000 Configuration Manual

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Scenarios for Configuration of ETH-SLM

Upstream MEP in MPLS Tunnels

Downstream MEP in Ethernet Networks

Copyright © 2017, Juniper Networks, Inc.
Chapter 34: Configuring Operations, Administration, and Management (OAM)
limitation includes the iterator support for other measurement types such as loss,
statistical frame loss, and two-way delay. A new iterator type, SLM, is added to support
ETH-SLM. The total number of SLA iterators that you can configure in the system is
equal to the total number of iterations supported in the system.
For on-demand SLM, the minimum period between two SLM requests is 100
milliseconds.
For proactive SLM, the minimum period between two SLM requests is 10 milliseconds
for distributed mode and 100 milliseconds for non-distributed mode.
ETH-SLM frames are always marked as drop-ineligible in compliance with the ITU-T
Y.1731 standard.
Ethernet Synthetic Loss Measurement Overview on page 1140
Transmission of ETH-SLM Messages on page 1141
Format of ETH-SLM Messages on page 1144
Scenarios for Configuration of ETH-SLM on page 1147
Managing ETH-SLM Statistics and ETH-SLM Frame Counts on page 1148
Starting a Proactive ETH-SLM Session on page 1153
Starting an On-Demand ETH-SLM Session on page 1156
Troubleshooting Failures with ETH-SLM
Ethernet Interfaces Feature Guide for Routing Devices
ETH-SLM measures near-end and far-end frame loss between two MEPs that are part
of the same MEG level. You can configure ETH-SLM to measure synthetic loss for both
upward-facing or upstream MEP and downward-facing or downstream MEP. This section
describes the following scenarios for the operation of ETH-SLM:
Consider a scenario in which a MEP is configured between the user network interfaces
(UNIs) of two MX Series routers, MX1 and MX2, in the upstream direction. MX1 and MX2
are connected over an MPLS core network. ETH-SLM measurements are performed
between the upstream MEP in the path linking the two routers. Both MX1 and MX2 can
initiate on-demand or proactive ETH-SLM, which can measure both far-end and near-end
loss at MX1 and MX2, respectively. The two UNIs are connected using MPLS-based Layer
2 VPN virtual private wire service (VPWS).
Consider a scenario in which a MEP is configured between two MX Series routers, MX1
and MX2, on the Ethernet interfaces in the downstream direction. MX1 and MX2 are
connected in an Ethernet topology and downstream MEP is configured toward the
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