BSR 2000 Configuration and Management Guide
Release 1.0
6-174
MGBI
526360-001-00 Rev. B
Tips for Administering Flap Lists
Follow these suggestions for administrating flap lists:
■
Write script(s) to periodically poll the flap list.
■
Analyze and identify CM trends from the flap list data.
■
Query the billing and administrative database for CM MAC address-to-street
address translation and generate reports. These reports can then be given to the
Customer Service Department or the cable plant’s Operations and Maintenance
Department. Maintenance personnel use the reports to see patterns of flapping
CMs, street addresses, and flap statistics that indicate which amplifier or feeder
lines are faulty. The reports also help troubleshoot problems in the downstream
and/or upstream path, and determine if a problem is related to ingress noise or
equipment.
■
Save the flap list statistics to a database server at least once a day to keep a record
of flap list statistics which includes upstream performance and quality control
data. These statistics can be used again at a later time to evaluate trends and solve
intermittent problems on the HFC networks. Once the flap list statistics are
backed up daily on the database server, the flap list statistics can be cleared.
Flap
The Flap counter indicates the number of times the CM has flapped. This
counter is incremented when one of the following events is detected:
Unusual CM insertion or re-registration attempts. The Flap and the Ins
counters are incremented when the CM tries to re-establish the RF link
with the BSR within a period of time that is less than the user-configured
insertion interval value.
Abnormal Miss/Hit ratio The Flap counter is incremented when N
consecutive Misses are detected after a Hit where N can be
user-configured with a default value of 6.
Unusual power adjustment The Flap and P-adj counters are incremented
when the CM’s upstream power is adjusted beyond a user-configured
power level.
Time
Time is the timestamp indicating the last time the CM flapped. The value
is based on the clock configured on the local BSR. If no time is
configured, this value is based on the current uptime of the BSR. When a
CM meets one of the three flap list criteria, the Flap counter is
incremented and Time is set to the current time.
Table 6-20 Flap List Statistic Interpretations
Field
Description
Содержание BSR 2000
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