Cisco Systems uBR7246 Manual De Usuario

Voice, Video, and Home Applications Configuration Guide

To activate cable modem authentication, use the following command from the cable interface 
configuration mode: 

Validation Tips

To verify if cable modem authentication has been activated or deactivated, enter the command more 
system:running-config and look for the cable interface configuration information. If cable modem 
authentication has been activated, it does not appear in this output. If cable modem authentication 
has been deactivated, it appears in this output as no cable secret-shared as shown in this command 
output excerpt:

router# more system:running-config

Building configuration...

 

Current configuration:

!

interface Cable6/0

 ip address 1.1.1.1 255.255.255.0

 no keepalive

no cable secret-shared

cable insertion-interval 150000

 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

If you are having trouble, make sure you entered the correct slot and port numbers when you entered 
cable interface configuration mode.

Activate Cable Modem Upstream Address Verification

You activate cable modem upstream address verification to ensure that only known cable modems 
on the HFC network can transmit upstream data to a Cisco uBR7246. The default is “off” (cable 
modem upstream address verification is deactivated).

To activate or deactivate cable modem upstream verification, use the following command:

cable shared-secret secret-key

Enable cable modem authentication. 

Activate cable modem upstream verification.