Junos® OS Ethernet Interfaces Configuration ... - Juniper Networks

• interval time
• loss-threshold number
To enable the continuity check protocol, include the continuity-check statement at the
[edit protocols oam ethernet connectivity-fault-management maintenance-domain
domain-name maintenance-association ma-name] hierarchy level.
Configuring the Continuity Check Hold Interval
You can specify the continuity check hold interval. The hold interval is the number of
minutes to wait before flushing the MEP database if no updates occur. The default value
is 10 minutes.
The hold interval logic runs a polling timer per CFM session level (not per remote MEP
level) where the polling timer duration is equal to the configured hold time. When the
polling timer expires, it deletes all the auto discovered remote MEP entries which have
been in the failed state for a time period equal to or greater than the configured hold
time. If the remote MEP completes the hold time duration in the failed state, then flushing
will not occur until the next polling timer expires. Hence remote MEP flushing may not
happen exactly at the configured hold time.
Configuring the Continuity Check Interval
Copyright © 2012, Juniper Networks, Inc.
To configure the hold interval, include the hold-interval statement at the [edit protocols
oam ethernet connectivity-fault-management maintenance-domain domain-name
maintenance-association ma-name continuity-check] hierarchy level.
NOTE: Hold timer based flushing is applicable only for auto discovered remote
MEPs and not for statically configured remote MEPs.
You can specify the continuity check message (CCM) interval. The interval is the time
between the transmission of CCMs. You can specify 10 minutes (10m), 1 minute (1m),
10 seconds (10s), 1 second (1s), 100 milliseconds (100ms), or 10 milliseconds (10ms).
The default value is 1 minute.
Chapter 13: Configuring IEEE 802.1ag OAM Connectivity-Fault Management
NOTE: For the continuity check message interval to be configured for 10
milliseconds, periodic packet management (PPM) runs on the Routing Engine
and Packet Forwarding Engine (PFE) by default. You can only disable PPM
on the PFE. To disable PPM on the PFE, use the no-delegate-processing
statement at the [edit routing-options ppm] hierarchy level.
Continuity check interval of 10 milliseconds is not supported for CFM sessions
over a Label-Switched interface (LSI).
To configure the interval, include the interval statement at the [edit protocols oam ethernet
connectivity-fault-management maintenance-domain domain-name
maintenance-association ma-name continuity-check] hierarchy level.
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