BSR 2000 Configuration and Management Guide
Release 1.0
6-170
MGBI
526360-001-00 Rev. B
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.
■
Power-on
■
Initial maintenance
■
Station maintenance
■
Power-off
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 (
) to interpret flap list
activity and solve CM problems:
Rng
Indicates the number of times the CM has ranged.
Type
Indicates the type of event that triggered the flap.
Time
Indicates the most recent time a flap has occurred for a particular CM.
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.
Table 6-18 show cable flap-list Command Output Field Display Fields
Field
Identification
Содержание BSR 2000
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