Cisco Systems uBR7200 Activating the Upstream Scrambler, Verifying Upstream Minislot Size, MC-551

Page 33

Configuring Headend Broadband Access Router Features

Configuring the Upstream Cable Interface

Verifying Upstream Minislot Size

To verify upstream minislot size, enter the show controllers cable 6/0 u0 command for the upstream port you have just configured:

CMTS01# show controllers cable 6/0 u0 Cable6/0 Upstream 0 is up

Frequency 24.016 MHz, Channel Width 1.600 MHz, QPSK Symbol Rate 1.280 Msps Spectrum Group is overridden

SNR 33.2560 dB

Nominal Input Power Level 0 dBmV, Tx Timing Offset 2288 Ranging Backoff automatic (Start 0, End 3)

Ranging Insertion Interval automatic (60 ms) Tx Backoff Start 0, Tx Backoff End 4 Modulation Profile Group 1 part_id=0xFFFF, rev_id=0xFF, rev2_id=0xFF nb_agc_thr=0x0000, nb_agc_nom=0x0000

Range Load Reg Size=0x58 Request Load Reg Size=0x0E

Minislot Size in number of Timebase Ticks is = 8 Minislot Size in Symbols = 64

Bandwidth Requests = 0xFE Piggyback Requests = 0xD Invalid BW Requests= 0x2 Minislots Requested= 0x2963 Minislots Granted = 0x2963 Minislot Size in Bytes = 16 Map Advance = 4000 usecs UCD Count = 32964

DES Ctrl Reg#0 = C000C043, Reg#1 = 0

Troubleshooting Tips

To troubleshoot the configuration, perform the following tasks:

Make sure the cable connections are not loose or disconnected.

Make sure the Cisco cable modem card is firmly seated in its chassis slot and the captive installation screws are tight.

Make sure you entered the correct slot and port numbers when you typed the command.

Make sure you entered the correct upstream port number:

On the MC16C cable modem card, this can be u0 to u5.

On the MC14C cable modem card, this can be u0 to u3.

On the MC12C cable modem card, this can be u0 or u1.

On the MC11C cable modem card, this can be u0 only.

Activating the Upstream Scrambler

The scrambler on the upstream RF carrier enables cable modems on the HFC network to use built-in scrambler circuitry for upstream data transmissions. The scrambler circuitry improves reliability of the upstream receiver on the cable modem card. The upstream scrambler is activated by default and should not be disabled under normal circumstances.

Cisco IOS Multiservice Applications Configuration Guide

MC-551

Image 33
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-525TAG/NetFlow Switching QoS Profile EnforcementMC-526 Tag Switching Netflow SwitchingMC-527 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-536CMTS01config-if#cable downstream frequency Verifying the Downstream Center FrequencyMC-537 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-540Setting the Downstream Helper Address Verifying the Downstream Helper AddressMC-541 MC-542 Setting Downstream Rate LimitingConfiguring the Upstream Cable Interface Verifying Downstream Rate LimitingMC-543 MC-544 Setting the Upstream FrequencyVerifying the Upstream Frequency MC-545CMTS01# show controllers cable 6/0 u0 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-550Activating the Upstream Scrambler Verifying Upstream Minislot SizeMC-551 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-553CMTS01config-if#no cable upstream usport rate-limit Verifying Upstream Rate LimitingMC-554 Activating Upstream Frequency Adjustment Frequency-adjust averaging percentageMC-555 Activating Upstream Power Adjustment Verifying Upstream Frequency AdjustmentMC-556 Verifying Upstream Power Adjustment Activating Upstream Timing AdjustmentMC-557 Continue secondsVerifying Upstream Timing Adjustment Activating the Upstream PortsMC-558 Setting Upstream Backoff Values Verifying the Upstream PortsMC-559 MC-560 CMTS01config-if#cable upstream usport rangeData-backoff start end Data-backoff automaticConfiguring and Activating Baseline Privacy Verifying Upstream Data Backoff AutomaticMC-561 Configuring KEK Privacy CMTS01config-if#cable privacy kek grace-timeMC-562 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 Verifying Spectrum Group Configuration Verifying Frequency HoppingMC-571 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 AssignmentsActivating Host-to-Host Communication Proxy ARP Verifying ARP RequestsMC-575 Activating Cable Proxy ARP Requests Configuring Dhcp OptionsActivating Cable Relay Agent Verifying Cable Proxy ARP RequestsActivating Dhcp giaddr Verifying Dhcp giaddr ActivationMC-577 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 profileConfiguring QoS Profiles Verifying Cable Modulation ProfilesMC-582 MC-583 Verifying QoS ProfilesEnforcing a QoS Profile Assignment Setting QoS PermissionVerifying QoS Permission MC-584Managing Cable Modems on the HFC Network Verifying a QoS Profile AssignmentMC-585 Configuring Telco Return Configuring Sync Message IntervalActivating Cable Modem Authentication Verifying Sync Message IntervalVerifying Cable Modem Authentication Activating Cable Modem Upstream Address VerificationMC-587 Activating Cable Modem Insertion Interval CMTS01config-if#cable source-verify dhcpVerifying Cable Modem Upstream Address Verification MC-588CMTS01config-if#cable insertion-interval automatic Verifying Cable Modem Insertion IntervalMC-589 Configuring Cable Modem Registration Timeout Verifying the Maximum Number of HostsMC-590 Clearing and Resetting Cable Modems Verifying Registration TimeoutMC-591 Verifying Cable Modem Clearing and Resetting Clearing Cable Modem CountersMC-592 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
Related manuals
Manual 88 pages 21.59 Kb