System information

Configuring the CMTS
6-101
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.
Type Indicates the type of event that triggered the flap.
Time Indicates the most recent time a flap has occurred for a particular CM.
Table 6-8 show cable flap-list Command Output Field Display Fields
Field Identification