Interpreting Flap List Statistics - Motorola BSR 2000 Configuration And Management Manual

BSR 2000 Configuration and Management Guide
Table 6-18 show cable flap-list Command Output Field Display Fields
Field
Rng
Type
Time

Interpreting Flap List Statistics

This section describes how to interpret flap list statistics in order to troubleshoot the
cable network
CM activity follows the sequence below.
The initial link insertion is followed by a keepalive loop between the BSR and CM
and is called station maintenance. When the link is broken, initial maintenance is
repeated to re-establish the link.
Initial maintenance @ Time T1
Station maintenance
Init maintenance @ Time T2
The Ins and Flap counters in the flap list are incremented whenever T2 – T1 < N
where N is the insertion-time parameter configured using the cable flap-list
insertion-time command. The default value for this parameter is TBD seconds.
Use the following cause or symptom observations
activity and solve CM problems:
Note: CMs go offline faster than the frequency hop period and can cause the
frequency to stay fixed while CMs go offline. Reduce the hop period to 10
seconds to adjust to the hop frequency period.
6-170
Identification
Indicates the number of times the CM has ranged.
Indicates the type of event that triggered the flap.
Indicates the most recent time a flap has occurred for a particular CM.
Power-on
Initial maintenance
Station maintenance
Power-off
(Table
MGBI
Release 1.0
6-19) to interpret flap list
526360-001-00 Rev. B