Chapter 4 Troubleshooting the System
Pinging Unresponsive Cable Modems
Configure PRBS Test Signals
Table
Step Command
1.#
2.
Purpose
Generates a PRBS test signal on the downstream channel. The interface is shut down.
Stops sending test signals.
Note Remember to reenable the interface to resume normal operations.
Verify Test Signal Output
To verify the output of a
The standard mode of operation is modulated signal output and the interface is active. For PRBS and continuous wave output, the selected interface will be shut down.
The functioning of the no cable downstream
Pinging Unresponsive Cable Modems
Ping a Cable Modem
Ping DOCSIS is a Cisco
Information the Ping DOCSIS feature includes a
To ping a specific cable modem to determine if it is online, use the following command in EXEC mode.
Table
Command | Purpose |
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CMTS01# ping docsis addr | Ping the cable modem with a specific MAC address |
| or IP address to see if it is online. |
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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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