Specifications

Installation and Operation Manual Appendix C Operation, Administration and Maintenance (OAM)
LA-210 Ver. 1.5 RMON Statistics C-9
Parameter Description
Frames Transmitted Total number of OAM frames transmitted in the current interval
Frames Lost Number of frames lost in the current interval
Unavailable Seconds Number of seconds during which the service was unavailable in the current
interval
Elapsed Time Time (in seconds) elapsed from beginning of the interval 0–900
Min. RT Delay Minimum round trip delay (in mseconds) calculated in the interval (or up to
elapsed time in current interval)
Avg. RT Delay Average round trip delay (in mseconds) calculated in the interval (or up to
elapsed time in current interval)
Max. RT Delay Maximum round trip delay (in mseconds) calculated in the interval (or up
to elapsed time in current interval)
Avg. DV Average delay variation (in mseconds) calculated in the interval (or up to
elapsed time in current interval)
Max. DV Maximum delay variation (in mseconds) calculated in the interval (or up to
elapsed time in current interval)
OAM Transmitted Frames
Counter
Total number of OAM frames transmitted since the service was enabled
OAM Frames Loss Counter Total number of OAM frames lost since the service was enabled
OAM Frame Loss Ratio Total number of lost OAM frames divided by total number of transmitted
OAM frames since the service was enabled
Elapsed Time Time (in seconds) elapsed since the service was enabled
Unavailable Seconds Total number of unavailable seconds since the service was enabled
Unavailability Ratio Total number of unavailable seconds divided by elapsed time
C.5 RMON Statistics
In addition to the regular statistics collection, LA-210 supports proactive SLA
measurements per LA-210 port, as per RMON-based RFC 2819. The device sends
reports when one of the available counters (physical layer or OAM) rise above or
drop below the set thresholds within the specified sampling period of time. These
reports can be sent as SNMP traps to the defined network management stations
or be written to the event log.
The following counters can be monitored:
• Dropped Frames
• Undersize Frames
• Oversize Frames
• Fragmented Frames
• Jabbers