2-114
Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 2 Cisco CMTS Configuration Commands
cable insertion-interval
cable insertion-interval
To configure the interval between consecutive initial ranging slots on an upstream, use the
cable
insertion-interval
interface configuration command. To configure the automatic setting and ignore any
minimum or maximum time settings, use the
no
form of this command.
cable insertion-interval
{
fixed-intrvl
|
automatic
[
min-intrvl
] [
max-intrvl]
}
no cable insertion-interval
Syntax Description
Defaults
Automatic (dynamically varying the frequency of initial ranging upstream slots between 50 milliseconds
and 500 milliseconds)
Command Modes
Interface configuration (cable interface only)
Command History
Usage Guidelines
Use this command to specify the minimum and maximum duration between initial ranging opportunities
that appear in MAP messages sent by the Cisco CMTS. MAP messages define the precise time intervals
during which CMs can send.
The default insertion interval setting (
automatic
) configures the Cisco CMTS to optimize the initial ranging
times available to new CMs that attempt to join the network. The optimization algorithm automatically varies
the initial ranging times between 50 and 500
milliseconds, depending
on the number of CMs attempting to
come online.
Use the
cable insertion-interval automatic
command to bring a large number of CMs online quickly
(for example, after a major power failure). After the CMs have come online, you can override the
automatic
keyword by giving this command again and specifying a specific insertion interval.
fixed-intrvl
Fixed interval between initial ranging slots in milliseconds. The valid
range is 100 to 2000 milliseconds.
automatic
Causes the Cisco CMTS MAC scheduler for each upstream CM to vary
the initial ranging times available to new CMs joining the network.
min-intrvl
(Optional) Minimum value in milliseconds between the initial ranging
slots on the upstream. The valid range is 20 to 120, with a default of 50
milliseconds.
max-intrvl
(Optional) Maximum value in milliseconds between the initial ranging
slots on the upstream. The valid range is 240 to 1800, with a default of
500 milliseconds.
Release
Modification
11.NA
This command was introduced.
12.1 T
This command was modified.