Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 260)

242 Multi-Service IronWare Administration Guide
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One-way Delay Measurement
6
One-way Delay Measurement over VPLS
One-way delay measurement can be done over VPLS where CFM is configured. In this use case,
CFM should be enabled and the up MEP should be configured on the VPLS end-points which
should be monitored. One-way delay measurement can be configured on the end-points for
periodic measurements irrespective of the CFM connectivity. Ensure CFM connectivity is up and
running before the one-way delay measurement session is actually started. Otherwise, this may
cause an error.
NOTE
If the VPLS end is configured as an untagged port, then the one-way delay measurement packet will
be considered as no priority and one-way delay measurement will be measured with priority 8. If
priority 8 is configured for the one-way delay measurement session, then all the other priority
one-way delay measurement sessions under the same MEP will not be allowed.
Supported configurations
The following are the additional supported configurations for monitoring one-way delay
measurement based on different time intervals. The functionality discussed below are common for
both VPLS and VLAN.
Monitor one-way delay measurement on demand
In this case, one-way delay measurement can be started immediately whenever required and can
be stopped after a period of time. The one-way delay will be calculated after receiving each one-way
delay measurement packet and delay statistics will be calculated for every measurement interval
configured. It can be viewed whenever required. This use case is useful whenever you want to
measure immediately (on demand).
Monitor one-way delay fixed interval of time
In this case, the one-way delay measurement can be configured to start at any fixed time and can
be stopped after a period of time. The one-way delay will be calculated after receiving each one-way
delay measurement packet and delay statistics will be calculated for every measurement interval
configured. It can be viewed whenever required. This use case is useful whenever the administrator
wants to measure at particular time interval.
Monitor one-way delay after relative time
In this case, the one-way delay measurement can be configured to start after a relative time and
can be stopped after a period of time. The one-way delay will be calculated after receiving each
one-way delay measurement packet and delay statistics will be calculated every measurement
interval configured. It can be viewed whenever required. This use case is useful whenever the
administrator wants to trigger the measurement after some duration.