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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
upstream freq-range
upstream freq-range
To configure the Cisco CMTS router for the range of frequencies that are acceptable on upstreams, use
the
upstream freq-range
command in global configuration
mode. To restore the default value of North
American ranges, use the
no
form of this command.
upstream freq-range
[
european
|
japanese
|
north american
]
no upstream freq-range
Syntax Description
Defaults
North American (DOCSIS, 5 MHz to 42 MHz)
Command Modes
Global configuration
Command History
Usage Guidelines
In Cisco IOS Release 12.2(15)BC2 and later, the Cisco CMTS router supports three different modes of
operation, depending on the cable interface line cards being used. The range of frequencies that are
allowed in each mode are as follows:
•
North American DOCSIS (Annex B)—Upstreams use frequencies between 5 MHz and 42 MHz.
•
European EuroDOCSIS (Annex A)—Upstreams use frequencies between 5 MHz and 65 MHz.
•
Japanese Expanded Range (Annex B)—Upstreams use frequencies between 5 MHz and 55 MHz.
To configure the router so that it supports the proper range of upstream frequencies, use the
upstream
freq-range
command. After you have configured the router with the
upstream freq-range
command,
the
cable upstream frequency
command then accepts only frequencies that are in the configured range.
Note
This command configures only the range of frequencies that can be configured on an upstream. It does
not configure the upstreams for the DOCSIS (Annex B) or EuroDOCSIS (Annex A) modes of operation,
which is done using the
cable downstream annex
interface command. (Annex C mode is not supported.)
The allowable range for the upstream channel frequency depends on the cable interface line card and
Cisco IOS software release being used. See
Table 2-11 on page 2-315
for the currently supported values.
european
Configures the Cisco CMTS router to accept upstream frequency ranges
that conform with the EuroDOCSIS specifications (5 MHz to 65 MHz).
japanese
Configures the Cisco CMTS router to accept upstream frequency ranges
that conform to the expanded range used in Japan (5 MHz to 55 MHz).
north american
Configures the Cisco CMTS router to accept upstream frequency ranges
that conform to the DOCSIS specifications (5 MHz to 42 MHz).
Release
Modification
12.2(15)BC2
This command was introduced for the Cisco uBR7246VXR and
Cisco uBR10012 universal broadband routers.
