Installation guide

5-8
Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Managing Cable Modems on the HFC Network
Configuring Cable Modem Registration Timeout
By default, registered cable modems that have no upstream activity for three minutes are timed out and
disconnected from the Cisco uBR7100 series CMTS. This timeout interval can be decreased to 2 minutes
or increased up to 60 minutes.
To specify the registration timeout interval for cable modems connected to the Cisco uBR7100 series
CMTS, use the following command in cable interface configuration mode.
Clearing Cable Modem Reset
To remove a single cable modem (or all cable modems) from the station maintenance list and reset the
cable modem (or all cable modems) on the network, use one of the following commands in cable
interface configuration mode.
Verifying Clear Cable Modem Reset
To determine if the clear cable modem reset command has removed a cable modem from the station
maintenance list and forced it to start a reset sequence, enter the show cable modem command.
Tip Be sure you entered the correct cable modem IP address or MAC address when you typed the clear cable
modem reset command. It might take up to 30 seconds for the cable modem to start the reset sequence.
Command Purpose
CMTS01(config-if)# cable max-hosts n
CMTS01(config-if)# no cable
max-hosts
Specify the maximum number of hosts that can be
attached to a cable modem on this interface. Valid range
is from 0 to 255 hosts. Default = 0.
Reset the allowable number of hosts attached to a cable
modem to the default value of 0 hosts.
Command Purpose
CMTS01(config-if)# cable
registration-timeout
n
Specify the maximum number of minutes allowed to elapse with
no upstream activity before terminating the connection. Valid
range is from 2 to 60 minutes. Default = 3 minutes.
Command Purpose
CMTS01(config-if)# clear cable modem
mac-addr reset
CMTS01(config-if)# clear cable modem
ip-addr reset
CMTS01(config-if)# clear cable modem all
reset
Remove the CM with a specific MAC address from
the station maintenance list and reset it.
Remove the CM with a specific IP address from the
station maintenance list and reset it.
Remove all CMs from the station maintenance list
and reset them.