user manual

Configuring Headend Broadband Access Router Features
Managing Cable Modems on the HFC Network
MC-590
Cisco IOS Multiservice Applications Configuration Guide
Troubleshooting Tips
To troubleshoot the configuration, make sure that you entered the correct slot and port numbers when
you typed the command.
Configuring the Maximum Number of Hosts Attached to a Cable Modem
To specify the maximum number of hosts that can be attached to a subscriber cable modem, use the
following command in cable interface configuration mode:
Verifying the Maximum Number of Hosts
To verify the maximum number of hosts that can be attached to a cable modem on a particular interface,
enter the more system:running-config command and look for a notation in the cable interface
configuration information as shown in this command output excerpt:
CMTS01# more system:running-config
Building configuration...
Current configuration:
!
interface Cable6/0
ip address 1.1.1.1 255.255.255.0
no keepalive
cable insertion-interval 2000
cable downstream annex B
cable downstream modulation 64qam
cable downstream interleave-depth 32
cable downstream symbol-rate 5056941
cable upstream 0 frequency 15008000
cable upstream 0 fec
cable upstream 0 scrambler
no cable upstream 0 shutdown
Troubleshooting Tips
To troubleshoot the configuration, make sure that you entered the correct slot and port numbers when
you typed the command.
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 uBR7200 series. This timeout interval can be decreased to two minutes or
increased to 60 minutes.
To specify the registration timeout interval for cable modems connected to the Cisco uBR7200 series,
use the following command in cable interface configuration mode:
Command Purpose
CMTS01(config-if)# cable max-hosts n
Specifies 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.