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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
cable freq-range
Interface Cable4/0 does not support Japanese frequency range
Interface Cable5/0 does not support Japanese frequency range
Router(config)#
interface cable 6/0
! This cable interface supports the Japanese range
Router(config-if)#
cable upstream 0 frequency ?
<5000000-55000000> Return Frequency in HZ
Router(config-if)#
The following example shows how to configure the Cisco CMTS router for its default configuration
(DOCSIS upstream frequency range of 5 MHz to 42 MHz). (No warning messages are displayed with
this configuration because all cable interface line cards support the basic DOCSIS frequency range.)
After giving this command, the
cable upstream frequency
command shows the valid range of upstream
frequencies as being the DOCSIS range:
Router#
configure terminal
Router(config)#
cable freq-range north-american
Router(config)#
interface cable 3/0
Router(config-if)#
cable upstream 0 frequency ?
<5000000-42000000> Return Frequency in HZ
Router(config-if)#
The following example shows all of the commands that are needed to configure the cable interface and
upstream on a Cisco uBR-MC28U/X cable interface line card to support a frequency in the EuroDOCSIS
upstream frequency range of 5 MHz to 65 MHz:
Router#
configure terminal
Router(config)#
cable freq-range european
Router(config)#
interface 3/0
Router(config-if)#
cable downstream annex a
Router(config-if)#
cable upstream 0 frequency 62500000
Router(config-if)#
The following example shows the
cable freq-range
command failing because an upstream is configured
for a frequency that is invalid for the new range. The upstream must be reconfigured before the
cable
freq-range
command can be given successfully.
Router#
configure terminal
Router(config)#
cable freq-range japanese
%%Interface Cable 3/0/U0 has invalid frequency (62500000 Hz) for specified range
%%Set upstream frequencies within range prior to changing freq-range
Router(config)#
interface 3/0
Router(config-if)#
cable upstream 0 frequency 38600000
Router(config-if)#
exit
Router(config)#
cable freq-range japanese
Router(config)#
Related Commands
Command
Description
cable downstream annex
Sets the Motion Picture Experts Group (MPEG) framing format for
a downstream port on a cable interface line card.
cable upstream frequency
Configures a fixed frequency of the upstream radio frequency (RF)
carrier for an upstream port.