Cisco Systems uBR7200 Activating IP Address Resolution Protocol, Activating Cable ARP Requests

Configuring Headend Broadband Access Router Features

Activating IP Address Resolution Protocol

Assigning the Spectrum Group and the Upstream Ports

To configure a frequency hop table after you have determined which upstream ports you want assigned to a combiner group, use the following commands:

	Command		Purpose
Step 1
	CMTS01(config)# interface cable slot/port		Enters cable interface configuration mode for the
			interface to which you wish to assign a spectrum
			group.
Step 2
	CMTS01(config-if)#	cable spectrum-group usport	Assigns the spectrum group to the interface.
Step 3
	CMTS01(config-if)#	cable upstream number	Assigns the upstream ports to the spectrum group for
	spectrum-group usport		the interface.
Step 4
	CMTS01(config-if)#	no cable upstream slot/port	Places the upstream port in the “admin up” state.
	shutdown
Step 5
	CMTS01(config-if)#	exit	Exits configuration mode and forces the system to
	CMTS01# test cable	hop c3/0	hop.
	CMTS01# test cable	hop c3/0

Verifying Spectrum Group and Upstream Port Assignments

To display the current allocation table and frequency assignments, use the show cable spectrum-groupcommand.

Activating IP Address Resolution Protocol

Address Resolution Protocol (ARP) is an Internet protocol used to map IP addresses to MAC addresses on computers and other equipment installed in a network. You need to activate ARP requests on the cable interface so that the Cisco uBR7200 series can perform IP address resolution on the downstream path.

Note The default values for the commands used in this configuration step are adequate in most cases to configure the Cisco uBR7200 series.

Activating Cable ARP Requests

To activate ARP requests, use the following command in cable interface configuration mode:

Command	Purpose
CMTS01(config-if)# cable arp	Enables ARP. This is the default.

Cisco IOS Multiservice Applications Configuration Guide

MC-574