Instruction/ maintenance manual of the product uBR7246 Cisco Systems
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Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-133 Configur ing Cisco uBR7246 Univ ersal Broadband Router F eatures Cisco uBR7246 universal broadband features enab le the Cisco uBR7246 universal broadband router to communicate with a hybrid f iber coaxial (H FC) cable network via a Cisco MC11 cable modem card.
VC-134 Voice, Video, and Home Applications Confi guration Guide Figure 38 T opology for uBR 7246 Universal Broadband Internet ATM, 100BT, 10BT 100BT Analog TV signals Digital TV signals Upconverter IS.
Description of Cisco uBR7246 Cable Router Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-135 Description of Cisco uBR7246 Cable Router As shown in Figure 38, the C isco uBR7246 serves as an interface between a W AN backbone and an HFC cable plant.
List of Terms VC-136 Voice, Video, and Home Applications Confi guration Guide • Providing a uni versal platform for deployment of both current and future m odem technologies via modular upgrades while protectin g the operator’ s in vested capital.
List of Terms Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-137 Prerequisite T asks Before you can configure Cisco uBR7246 univ ersal broadban d router features, you must first: • Make sure that your current network is designed to support broadband tran smission.
Configure the Downstream Cable Interface VC-138 Voice, Video, and Home Applications Confi guration Guide • Install at least one Cisco MC11 cable modem card in the appropriate slot of Cisco uBR72 46 chassis.
Set the Downs tream Cent er Frequency Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-139 Note The default v alues for the commands used in th ese conf iguration steps are, in most cases, adequate to configure the Cisco uBR7246.
Configure the Downstream Cable Interface VC-140 Voice, Video, and Home Applications Confi guration Guide T roub leshooting Tips If you are having trouble: • Make sure the cable connections are not loose or disconnected. • Make sure the cable modem card is f irmly seated in its Cisco uBR7246 chassis slot.
Set the Downstream MPEG Framin g Format (Annex A or Annex B) Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-141 Set the Downstream MPEG F rami ng F or mat (Anne x A or Anne x B) The MPEG framing format must be compatible with the downstream symbol rate you set.
Configure the Downstream Cable Interface VC-142 Voice, Video, and Home Applications Confi guration Guide T o set the downstream modulation, use the follo wing command in cable interface conf iguration.
Activate the Downstream Carrier Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-143 T roub leshooting Tips If you are having trouble: • Make sure the cable connections are not loose or disconnected. • Make sure the cable modem card is f irmly seated in its Cisco uBR7246 chassis slot.
Configure the Upstream Cable Interface VC-144 Voice, Video, and Home Applications Confi guration Guide Configure the Upstream Cable Interface The next step is to configure the upstream cable interface. In this case, upstream refers to the data flow from a cable modem to the Cisco MC11 modem card in a Cisco uBR7246.
Set the Upstream Input Power Level Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-145 V alidation Tips T o verify the curr ent value of the upstream freque ncy , enter the show con.
Configure the Upstream Cable Interface VC-146 Voice, Video, and Home Applications Confi guration Guide V alidation Tips T o verify the current value of the upstream input power level, enter the show c.
Activate the Upstream Scrambler Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-147 V alidation Tips T o verify if FEC is a ctiv ated or deactiv ated, enter the command more system:ru nning-conf ig and look for the cable interface conf iguration inform ation.
Configure the Upstream Cable Interface VC-148 Voice, Video, and Home Applications Confi guration Guide V alidation Tips T o verify if the upst ream scramble r is activ ated, enter the command more system:runn ing-conf ig and look for the cable interface conf iguration information.
Configure and Activate Baseline Privacy Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-149 V alidation Tips T o verify if the upstream ports are activ ated or deacti vated, enter t.
Configure and Activat e Baseline Privacy VC-150 Voice, Video, and Home Applications Confi guration Guide The configuration and acti v ation of baseline priv acy depend on each cable operator’ s physical plant.
Activate Baseline Priva cy Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-151 V alidation Tips T o verify the tek life-time or grace-time v alues that ha ve been set, enter the sho.
Configure and Activate Frequency Agility VC-152 Voice, Video, and Home Applications Confi guration Guide Note The cable interf ace will not oper ate until you either cr eate and conf igure a spectrum group or set a fix ed upstream frequency . From the interface configuration prompt, an interface is assigned membership in a spectrum group.
Configure and Activate Spectrum Groups Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-153 Configure and Activ ate Spectr um Groups After you create a spectrum group, you need to conf igure a list of upstream frequencies and nominal po wer lev els that each spectrum group can use when an upstream frequency change is necessary .
Activate Host-to-Host Co mmunication (Proxy ARP) VC-154 Voice, Video, and Home Applications Confi guration Guide Activ ate Address Resolution Protocol Requests T o activ ate ARP requests, use the foll.
Activate Proxy ARP Requests Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-155 Activ ate Pro xy ARP Requests T o activ ate proxy ARP for host-to-host communi cations, use the follo.
Set Optional IP Parameter s VC-156 Voice, Video, and Home Applications Confi guration Guide Activ ate IP Multicast Echo Y ou can activ ate upstream IP multicast echo so th at the Cisco uBR7246 can echo multicast packets. The default is “on” (IP multicast echo is acti vated).
Manage Cable Modems on the HFC Network Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-157 V alidation Tips T o verify if IP broadcast echo has been acti v ated or d eactiv ated, en.
Manage Cable Mode ms on the HFC Netwo rk VC-158 Voice, Video, and Home Applications Confi guration Guide T o activ ate cable modem authentication, use th e follo wing command from the cable interface .
Activate Cable Mode m Insertion Interval Configuring Cisco uBR7246 Uni versal Broadband Ro uter Features VC-159 V alidation Tips T o verify that cable mo dem upst ream verif ication has been acti v ated or deacti vated, enter the command more system:running-conf ig and look for the cable interf ace conf iguration information.
Universal Broadband Featur es Configuration Example VC-160 Voice, Video, and Home Applications Confi guration Guide V alidation Tips T o verify that a cab le modem insertio n in terval has been set, e.
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If you already are a holder of Cisco Systems uBR7246, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cisco Systems uBR7246.
However, one of the most important roles played by the user manual is to help in solving problems with Cisco Systems uBR7246. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cisco Systems uBR7246 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
