Ethernet network. ETH-SLM measurements are performed between the downstream
MEP in the path linking the two routers. ETH-SLM can be measured in the path between
these two routers.
Consider another scenario in which a MEP is configured in the downstream direction and
service protection for a VPWS over MPLS is enabled by specifying a working path or
protect path on the MEP. Service protection provides end-to-end connection protection
of the working path in the event of a failure. To configure service protection, you must
create two separate transport paths—a working path and a protect path. You can specify
the working path and protect path by creating two maintenance associations. To associate
the maintenance association with a path, you must configure the MEP interface in the
maintenance association and specify the path as working or protect.
In a sample topology, an MX Series router, MX1, is connected to two other MX Series
routers, MX2 and MX3, over an MPLS core. The connectivity fault management (CFM)
session between MX1 and MX2 is the working path on the MEP and the CFM session
between MX1 and MX3 is the protect path on the MEP. MX2 and MX3 are, in turn,
connected on Ethernet interfaces to MX4 in the access network. Downstream MEP is
configured between MX1 and MX4 that passes through MX2 (working CFM session) and
also between MX1 and MX4 that passes through MX3 (protected CFM session). ETH-SLM
is performed between these downstream MEPs. In both the downstream MEPs, the
configuration is performed on MX1 and MX4 UNIs, similar to upstream MEP.
Related
Documentation
Ethernet Synthetic Loss Measurement Overview on page 1140•
• Transmission of ETH-SLM Messages on page 1141
• Format of ETH-SLM Messages on page 1144
• Guidelines for Configuring ETH-SLM on page 1146
• 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
Managing ETH-SLM Statistics and ETH-SLM Frame Counts
•
Displaying ETH-SLM Statistics Only on page 1149
•
Displaying ETH-SLM Statistics and Frame Counts on page 1149
•
Displaying ETH-SLM Frame Counts for MEPs by Enclosing CFM Entity on page 1150
•
Displaying ETH-SLM Frame Counts for MEPs by Interface or Domain Level on page 1151
•
Clearing ETH-SLM Statistics and Frame Counts on page 1151
•
Clearing Iterator Statistics on page 1152
Copyright © 2017, Juniper Networks, Inc.1148
ACX Series Universal Access Router Configuration Guide
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