Monitoring Docsis Operations; Monitoring The Docsis Network; Displaying The Status Of Cable Modems - Cisco cBR 8 Configuration Manual

DOCSIS 1.1 for the Cisco CMTS Routers

Monitoring DOCSIS Operations

The following sections describe the commands that provide information about the DOCSIS network and its
cable modems, the RF network and cable interfaces on the CMTS, and BPI+ operations.

Monitoring the DOCSIS Network

The show cable modem command is the primary command to display the current state of cable modems and
the DOCSIS network. This command has many options that provide information on different aspects of
DOCSIS operations.

Displaying the Status of Cable Modems

To display a list of known cable modems and their current status, use the show cable modem command.
You can also display a particular cable modem by specifying its MAC address or IP address with the show
cable modem command. If you specify the MAC address or IP address for a CPE device, the command will
display the information for the cable modem that is associated with that device.
If the CPE IP address is no longer associated with a cable modem, the show cable modem command
Note
might not display information about the cable modem. To display the IP address of the CPE device for
the cable modem, use the clear cable host ip-address command to clear the IP address of the modem
from the router database, and then enter the ping docsis mac-address command, which resolves the MAC
address by sending the DOCSIS ping to the CM.
To display a list of cable modems sorted by their manufacturer, use the vendor option.
The MAC state field in each of these displays shows the current state of the cable modem:
Table 12: Descriptions for the MAC State Field
MAC State Value
Registration and Provisioning Status Conditions
init(r1)
init(r2)
init(rc)
init(d)
Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE Fuji

Monitoring DOCSIS Operations

Description
The CM sent initial ranging.
The CM is ranging. The CMTS received initial
ranging from the Cm and has sent RF power, timing
offset, and frequency adjustments to the CM.
Ranging has completed.
The DHCP request was received. This also indicates
that the first IP broadcast packet has been received
from the CM.
16.7.x
61