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OS 12.3 Ethernet Interfaces Configuration Guide
Configuring Statistical Frame Loss Measurement for VPLS Connections
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Using proactive statistical frame loss measurement, you can monitor VPLS connections
on MX Series routers . Statistical frame loss measurement allows you to monitor the
quality of Ethernet connections for service level agreements (SLAs). Point-to-point and
multipoint-to-multipoint connections configured on MX Series routers can be monitored
by registering the connection on an iterator and initiating periodic SLA measurement of
frame transmissions on the connections.
Iterators periodically transmit SLA measurement packets using ITU-Y.1731 compliant
frames. The iterator sends periodic measurement packets for each of the connections
registered to it. These measurement cycles are transmitted in such a way as to not overlap,
reducing the processing demands placed on the CPU. The measurement packets are
exchanged between the source user network interface (UNI) port and the destination
UNI port, providing a sequence of timed performance measurements for each UNI pair.
The Frame Loss Ratio (FLR) and connection availability can be computed from these
measurements using statistics.
The following steps outline how to configure statistical frame loss measurement for
VPLS connections:
1. To configure proactive ETH-DM measurement for a VPLS connection, see “Guidelines
for Configuring Routers to Support an ETH-DM Session” on page 253.
2. To enable statistical loss measurement for a VPLS connection, configure an iterator
for the VPLS connection using the sla-iterator-profiles statement at the [edit protocols
oam ethernet connectivity-fault-management performance-monitoring] hierarchy level.
For detailed instructions, see “Configuring an Iterator Profile” on page 249.
3. As part of the iterator configuration, include the statistical-frame-loss option for the
measurement-type statement at the [edit protocols oam ethernet
connectivity-fault-management performance-monitoring sla-iterator-profiles
profile-name] hierarchy level.
4. Once you have enabled the iterator, you can display the statistical frame loss for a
•
VPLS connection by issuing the show oam ethernet connectivity-fault-management
sla-iterator-statistics sla-iterator identifier maintenance-domain name
maintenance-association name local-mep identifier remote-mep identifier command.
Guidelines for Configuring Routers to Support an ETH-DM Session on page 253
• Configuring an Iterator Profile on page 249
• Example: Configuring an Iterator on page 283
• Junos® OS Ethernet Interfaces
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