Cisco Systems uBR7200 Configuring and Activating Frequency Agility, Activating Baseline Privacy

Configuring Headend Broadband Access Router Features

Configuring and Activating Frequency Agility

Activating Baseline Privacy

After the KEK and TEK values have been set, activate encryption on the HFC network by using the following commands in cable interface configuration mode:

	Command	Purpose
Step 1
	CMTS01(config-if)#cable privacy enable	Activates cable privacy. This is the default.
Step 2
	CMTS01(config-if)#cable privacy mandatory	Activates cable privacy and does not allow access for
		any unencrypted cable modem connections.

Verifying Baseline Privacy

To verify whether or not baseline privacy is activated, enter the cable privacy enable or cable privacy mandatory command. By default, cable privacy is enabled and can only be disabled with the no cable privacy command.

Troubleshooting Tips

To troubleshoot the configuration, perform the following tasks:

•Make sure you entered a valid value for grace time or life time for KEK and TEK privacy.

•If you entered the cable privacy mandatory command, then cable modems will not operate unless the cable modem configuration file specifies that privacy is on.

Configuring and Activating Frequency Agility

The Cisco uBR7200 series universal broadband routers divide a cable plant into downstream channels. Downstream channels contain upstream segments.

Each upstream segment typically serves more than one fiber node. Upstream segments can be defined as one of the following:

•Sparse segment—Containing one upstream channel per upstream segment.

•Dense segment—Containing multiple upstream channels per upstream segment; frequencies must be different.

Note A cable modem card supports either sparse or dense segments—not both.

Defining sparse segments allows the cable operator to share upstream bandwidth among fiber nodes with fewer subscribers. Defining dense segments allows the cable operator to provide larger upstream bandwidth to fiber nodes with many subscribers. Figure 109 illustrates sparse versus dense segments.

Cisco IOS Multiservice Applications Configuration Guide

MC-564