Chapter 4 Troubleshooting the System
Managing Cable Modems on the HFC Network
Verify Sync Message Interval
To verify whether or not a sync message interval is configured, enter the show
Activate Cable Modem Authentication
The Cisco uBR7200 series can be configured to require all cable modems to return a known text string to register with the CMTS and gain access to the network. The text string can be from 1 to 80 characters in length. To activate cable modem authentication, use the following command from cable interface configuration mode.
Table | Instructions to Activate Cable Modem Authentication |
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Command |
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Enable cable modem authentication: 0 specifies an | ||
unencrypted authentication key; 7 specifies an | ||
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| encrypted authentication key. |
Disable cable modem authentication.
Tips Be sure you enter the correct slot and port number in the cable interface configuration mode. Verify that the cable modem is using BPI and that it is assigned to a QoS with privacy active. Verify that the cable modem configuration file contains a matching key.
Verify Cable Modem Authentication
To verify whether cable modem authentication is activated or deactivated, enter the command more
Activate Cable Modem Upstream Address Verification
Cable modem upstream address verification ensures that only cable modems that have received DHCP leases through the Cisco uBR7200 series can access the HFC network. The Cisco uBR7200 series discards all packets received from or for hosts that have not received
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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