Cisco Systems uBR7200 manual Configuring the Downstream Cable Interface, MC-535

Page 17

Configuring Headend Broadband Access Router Features

Configuring the Downstream Cable Interface

Configuring the Downstream Cable Interface

The first step in configuring the Cisco cable modem interface is to configure the downstream cable interface. The downstream direction refers to the data flow from the Cisco cable modem card in a Cisco uBR7200 series to the subscriber’s cable modem. Data passing through the Cisco cable modem card is converted to IF and then passed through an upconverter to transform the signal to RF. This RF signal is then sent down the line to the subscriber’s cable modem. Downstream cable interface commands configure the frequency, symbol rate, compression, and modulation of the downstream signal.

To configure the downstream cable interface, perform the following tasks:

Activating the Downstream Carrier

Setting the Downstream Center Frequency

Setting the Downstream Channel ID

Setting the Downstream MPEG Framing Format (Annex B)

Setting the Downstream Modulation

Setting the Downstream Interleave Depth

Setting the Downstream Helper Address

Setting Downstream Rate Limiting

Note In most applications, the default values for the commands used in these configuration steps are adequate to configure the Cisco uBR7200 series router.

Activating the Downstream Carrier

To activate a downstream port on a Cisco uBR7200 series cable modem card for digital data transmissions over the HFC network, use the following commands:

 

Command

Purpose

Step 1

 

 

CMTS01> enable

Enters enable (privileged EXEC) mode.

 

Password: <password>

Enters the password.

 

CMTS01#

 

 

You have entered privileged EXEC mode when the

 

 

prompt displays the pound symbol (#).

Step 2

 

 

CMTS01# configure terminal

Enters global configuration mode. You have entered

 

Enter configuration commands, one per line. End with

global configuration mode when the prompt displays

 

CNTL/Z.

(config)#.

 

CMTS01(config)#

 

 

 

 

This command can be abbreviated to config t.

Step 3

 

 

CMTS01(config)# interface cable 6/0

Enters cable interface configuration mode.

 

CMTS01(config-if)#

In this example, the interface is downstream port 0 on

 

 

 

 

the cable modem card installed in slot 6 of the

 

 

Cisco uBR7200 series.

 

 

 

Cisco IOS Multiservice Applications Configuration Guide

MC-535

Image 17
Contents MC-519 Configuring Headend Broadband Access Router FeaturesMC-520 Headend OverviewTopology of a Typical Broadband Network Voice over IP Services MC-523 Telco ReturnTOD MC-524Service Class Profiles QoS FeaturesMultiple Service IDs MC-525MC-526 TAG/NetFlow SwitchingQoS Profile Enforcement MC-527 Tag SwitchingNetflow Switching Weighted Random Early Detection Security FeaturesWeighted Fair Queueing Committed Access Rate CARDocsis Baseline Privacy Cable Modem and Multicast Authentication Using RadiusUpstream Address Verification MC-529Operations and Provisioning Features Traffic Shaping FeaturesDynamic Ranging MC-530Burst Profile Configuration Downstream Channel ID ConfigurationDownstream Frequency Override CPE LimitationSpectrum Management MC-533 Headend Broadband Access Router Configuration PrerequisitesMC-534 Headend Broadband Access Router Configuration TasksCMTS01# configure terminal Configuring the Downstream Cable InterfaceCMTS01config# interface cable 6/0 Activating the Downstream CarrierTroubleshooting Tips Setting the Downstream Center FrequencyVerifying the Downstream Carrier MC-536MC-537 CMTS01config-if#cable downstream frequencyVerifying the Downstream Center Frequency Setting the Downstream Mpeg Framing Format Annex B Setting the Downstream Channel IDVerifying the Downstream Channel ID MC-538Verifying the Downstream Mpeg Framing Format Setting the Downstream ModulationVerifying the Downstream Modulation MC-539CMTS01config-if#cable downstream interleave-depth Setting the Downstream Interleave DepthVerifying the Downstream Interleave Depth MC-540MC-541 Setting the Downstream Helper AddressVerifying the Downstream Helper Address MC-542 Setting Downstream Rate LimitingMC-543 Configuring the Upstream Cable InterfaceVerifying Downstream Rate Limiting MC-544 Setting the Upstream FrequencyCMTS01# show controllers cable 6/0 u0 Verifying the Upstream FrequencyMC-545 Verifying Upstream Channel Width Setting the Upstream Channel WidthMC-546 Channel-width widthMC-547 Setting the Upstream Input Power LevelActivating Upstream Admission Control Verifying the Upstream Input Power LevelVerifying Upstream Admission Control MC-548MC-549 Activating Upstream FECSpecifying Upstream Minislot Size Router# more systemrunning-configVerifying Upstream FEC MC-550MC-551 Activating the Upstream ScramblerVerifying Upstream Minislot Size CMTS01# more systemrunning-config CMTS01config-if#cable upstream usport scramblerVerifying the Upstream Scrambler MC-552Activating Upstream Rate Limiting Activating Upstream Differential EncodingVerifying Upstream Differential Encoding MC-553MC-554 CMTS01config-if#no cable upstream usport rate-limitVerifying Upstream Rate Limiting MC-555 Activating Upstream Frequency AdjustmentFrequency-adjust averaging percentage MC-556 Activating Upstream Power AdjustmentVerifying Upstream Frequency Adjustment Verifying Upstream Power Adjustment Activating Upstream Timing AdjustmentMC-557 Continue secondsMC-558 Verifying Upstream Timing AdjustmentActivating the Upstream Ports MC-559 Setting Upstream Backoff ValuesVerifying the Upstream Ports MC-560 CMTS01config-if#cable upstream usport rangeData-backoff start end Data-backoff automaticMC-561 Configuring and Activating Baseline PrivacyVerifying Upstream Data Backoff Automatic MC-562 Configuring KEK PrivacyCMTS01config-if#cable privacy kek grace-time Verifying KEK Privacy Configuring TEK PrivacyVerifying TEK Privacy MC-563Activating Baseline Privacy Configuring and Activating Frequency AgilityVerifying Baseline Privacy MC-564MC-565 Combiner GroupsMC-566 Frequency Management PolicyMC-567 Determining the Upstream Ports Assigned to a Combiner GroupCreating Spectrum Groups Configuring and Activating Spectrum GroupsVerifying Spectrum Groups MC-568MC-569 Command PurposeMC-570 MC-571 Verifying Spectrum Group ConfigurationVerifying Frequency Hopping MC-572 Configuring Spectrum Group CharacteristicsCMTS01config# cable spectrum-group groupnum hop Verifying Spectrum Group CharacteristicsMC-573 Threshold percentAssigning the Spectrum Group and the Upstream Ports Activating IP Address Resolution ProtocolActivating Cable ARP Requests Verifying Spectrum Group and Upstream Port AssignmentsMC-575 Activating Host-to-Host Communication Proxy ARPVerifying ARP Requests Activating Cable Proxy ARP Requests Configuring Dhcp OptionsActivating Cable Relay Agent Verifying Cable Proxy ARP RequestsMC-577 Activating Dhcp giaddrVerifying Dhcp giaddr Activation Setting Optional IP Parameters Setting Service OptionsConfiguring ToD Service Verifying ToD ServiceActivating IP Broadcast Echo Activating IP Multicast EchoVerifying IP Multicast Echo MC-579Configuring Cable Modulation Profiles Configuring Cable ProfilesVerifying IP Broadcast Echo MC-580MC-581 Number profileMC-582 Configuring QoS ProfilesVerifying Cable Modulation Profiles MC-583 Verifying QoS ProfilesEnforcing a QoS Profile Assignment Setting QoS PermissionVerifying QoS Permission MC-584MC-585 Managing Cable Modems on the HFC NetworkVerifying a QoS Profile Assignment Configuring Telco Return Configuring Sync Message IntervalActivating Cable Modem Authentication Verifying Sync Message IntervalMC-587 Verifying Cable Modem AuthenticationActivating Cable Modem Upstream Address Verification Activating Cable Modem Insertion Interval CMTS01config-if#cable source-verify dhcpVerifying Cable Modem Upstream Address Verification MC-588MC-589 CMTS01config-if#cable insertion-interval automaticVerifying Cable Modem Insertion Interval MC-590 Configuring Cable Modem Registration TimeoutVerifying the Maximum Number of Hosts MC-591 Clearing and Resetting Cable ModemsVerifying Registration Timeout MC-592 Verifying Cable Modem Clearing and ResettingClearing Cable Modem Counters Verifying that Cable Modem Counters are Cleared Using Ping DocsisVerifying Ping Docsis MC-593MC-594 Spectrum Management Configuration ExampleMC-595 Virtual Private Network Configuration ExampleMC-596 MC-597 Ip http server Ip http authentication local No cdp runMC-598 VoIP Configuration ExampleIp subnet-zero No ip domain-lookup MC-599MC-600 Telco Return Configuration ExampleMC-601 Cable telco-return enableCable Modem all reset QoS Profile Enforcement Configuration ExampleMC-602 Cable RegSetting Cable Flap List Aging Troubleshooting Using Cable Flap ListsCMTS01config# cable flap-list aging days MC-603Setting Cable Flap List Power Adjustment Threshold Setting Cable Flap List Insertion TimeVerifying Cable Flap List Aging Verifying Cable Flap List Insertion TimeVerifying Cable Flap List Power Adjustment Threshold Setting Cable Flap List Miss ThresholdCMTS01config# cable flap-list miss-threshold misses Verifying Cable Flap List Miss ThresholdClearing Cable Flap List Setting Cable Flap List SizeVerifying Cable Flap List Size MC-606
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