Alcatel-Lucent 7342 - ONT Performance Monitoring Data; Counters

11 — ONT statistics and performance monitoring
Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06 July 2008 11-3
3FE 51892 AAAA TCZZA Edition 01 ONT Product Information Manual
11.4 ONT performance monitoring data
The 7342 ISAM FTTU provides a number of statistical counters in both the
downstream and upstream direction for the ONT. These statistical counts are
available as “always-on” counters and “on-demand” counters, and include the
following:
• DS1/E1 ports
• Ethernet layer 1
• Ethernet layer 2
• GPON TC-layer (near-end)
• MoCA ports
• optical link status level
• VDSL2 channels and ports
• VoIP ports
You can enable or disable counters using TL1. Counters are disabled by default
unless indicated otherwise. Some counters have restrictions for the total number that
you can activate at the same time. See the 7342 ISAM FTTU Operations and
Maintenance Procedures Guide using TL1 and CLI document for information about
any restrictions that apply to each performance statistic type.
Counters
Counters are either interval-based counters or rolling counters.
Interval-based counters are statistical counts that are accumulated over a predefined
time interval, such as a 15-min interval, and logged as an integer entry in a table. A
total of 32 15-min intervals occurring over an 8-hr period are logged. After the 8 hr
has elapsed, new 15-min intervals overwrite the oldest entry recorded in the log file.
Rolling counters start at zero and count up to a maximum value. When the maximum
value is reached, the counter restarts at zero. Unlike interval-based counters, no logs
are maintained for rolling counters.
Counters serve to:
• ensure availability of up-to-date information about how the system is working
• help to establish threshold settings that represent acceptable performance under
normal operational conditions. After collecting counters over a range of network
activities and loads, a range of measurements can be defined, which serve as a
reference point to detect problems when they occur
• detect error conditions, so that an alarm is raised when the count violates the
threshold setting
• isolate and monitor a situation
• diagnose problems as they occur when an alarm is raised
Note — When the system date changes; for example, due to the move
to daylight saving time, performance statistics collection is affected
and an interval is either repeated or lost.