Cisco Systems uBR7200 Activating Upstream Admission Control, Verifying Upstream Admission Control

Page 30

Configuring Headend Broadband Access Router Features

Configuring the Upstream Cable Interface

Verifying the Upstream Input Power Level

To verify the current value of the upstream input power level, enter the show controllers cable 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 0.800 MHz, QPSK Symbol Rate 0.640 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

Troubleshooting Tips

To troubleshoot the configuration, perform the following tasks:

Verify that the upstream amplitude of an optimal RF carrier injected at the fiber node reference input point reaches the MC16C input point at a consistent level (node-to-node and port-to-port), and that this absolute level as installed matches both the design and software settings on the Cisco uBR7200 series.

Software adjustments of 1 to 3 dB can be used to adjust for minor variations in measurement or setup and port-to-port calibration differences. These adjustments can significantly improve cable modem performance, especially in marginal situations. Larger adjustments should be made in conjunction with spectrum analyzer-support in the headend.

Activating Upstream Admission Control

The admission control is set as a percentage of the specified upstream channel capacity. The acceptable range is from 10 to 1000 percent. Admission control is disabled by default.

To set the upstream admission control, use the following command in cable interface configuration mode:

Command

Purpose

 

 

CMTS01(config-if)#cable upstream usport admission-control

Sets the admission control as a percentage of the

percentage

upstream channel capacity. Valid range is from 10 to

 

1000 percent.

 

 

Verifying Upstream Admission Control

To verify whether or not upstream admission control has been configured and activated, enter the show running-configcommand in privileged EXEC mode and look for the cable interface configuration information. If upstream admission control has been configured and enabled, an admission control entry will be displayed in the show running-configoutput, indicating the user-defined percentage of upstream channel capacity allowable. If upstream admission control is disabled, no admission control entry will be displayed in the output.

CMTS01# show running-config

Cisco IOS Multiservice Applications Configuration Guide

MC-548

Image 30
Contents Configuring Headend Broadband Access Router Features MC-519Headend Overview MC-520Topology of a Typical Broadband Network Voice over IP Services Telco Return MC-523MC-524 TODMultiple Service IDs QoS FeaturesService Class Profiles MC-525TAG/NetFlow Switching QoS Profile EnforcementMC-526 Tag Switching Netflow SwitchingMC-527 Weighted Fair Queueing Security FeaturesWeighted Random Early Detection Committed Access Rate CARUpstream Address Verification Cable Modem and Multicast Authentication Using RadiusDocsis Baseline Privacy MC-529Dynamic Ranging Traffic Shaping FeaturesOperations and Provisioning Features MC-530Downstream Frequency Override Downstream Channel ID ConfigurationBurst Profile Configuration CPE LimitationSpectrum Management Headend Broadband Access Router Configuration Prerequisites MC-533Headend Broadband Access Router Configuration Tasks MC-534CMTS01config# interface cable 6/0 Configuring the Downstream Cable InterfaceCMTS01# configure terminal Activating the Downstream CarrierVerifying the Downstream Carrier Setting the Downstream Center FrequencyTroubleshooting Tips MC-536CMTS01config-if#cable downstream frequency Verifying the Downstream Center FrequencyMC-537 Verifying the Downstream Channel ID Setting the Downstream Channel IDSetting the Downstream Mpeg Framing Format Annex B MC-538Verifying the Downstream Modulation Setting the Downstream ModulationVerifying the Downstream Mpeg Framing Format MC-539Verifying the Downstream Interleave Depth Setting the Downstream Interleave DepthCMTS01config-if#cable downstream interleave-depth MC-540Setting the Downstream Helper Address Verifying the Downstream Helper AddressMC-541 Setting Downstream Rate Limiting MC-542Configuring the Upstream Cable Interface Verifying Downstream Rate LimitingMC-543 Setting the Upstream Frequency MC-544Verifying the Upstream Frequency MC-545CMTS01# show controllers cable 6/0 u0 MC-546 Setting the Upstream Channel WidthVerifying Upstream Channel Width Channel-width widthSetting the Upstream Input Power Level MC-547Verifying Upstream Admission Control Verifying the Upstream Input Power LevelActivating Upstream Admission Control MC-548Activating Upstream FEC MC-549Verifying Upstream FEC Router# more systemrunning-configSpecifying Upstream Minislot Size MC-550Activating the Upstream Scrambler Verifying Upstream Minislot SizeMC-551 Verifying the Upstream Scrambler CMTS01config-if#cable upstream usport scramblerCMTS01# more systemrunning-config MC-552Verifying Upstream Differential Encoding Activating Upstream Differential EncodingActivating Upstream Rate Limiting 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 MC-557 Activating Upstream Timing AdjustmentVerifying Upstream Power Adjustment Continue secondsVerifying Upstream Timing Adjustment Activating the Upstream PortsMC-558 Setting Upstream Backoff Values Verifying the Upstream PortsMC-559 Data-backoff start end CMTS01config-if#cable upstream usport rangeMC-560 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 TEK Privacy Configuring TEK PrivacyVerifying KEK Privacy MC-563Verifying Baseline Privacy Configuring and Activating Frequency AgilityActivating Baseline Privacy MC-564Combiner Groups MC-565Frequency Management Policy MC-566Determining the Upstream Ports Assigned to a Combiner Group MC-567Verifying Spectrum Groups Configuring and Activating Spectrum GroupsCreating Spectrum Groups MC-568Command Purpose MC-569MC-570 Verifying Spectrum Group Configuration Verifying Frequency HoppingMC-571 Configuring Spectrum Group Characteristics MC-572MC-573 Verifying Spectrum Group CharacteristicsCMTS01config# cable spectrum-group groupnum hop Threshold percentActivating Cable ARP Requests Activating IP Address Resolution ProtocolAssigning the Spectrum Group and the Upstream Ports Verifying Spectrum Group and Upstream Port AssignmentsActivating Host-to-Host Communication Proxy ARP Verifying ARP RequestsMC-575 Activating Cable Relay Agent Configuring Dhcp OptionsActivating Cable Proxy ARP Requests Verifying Cable Proxy ARP RequestsActivating Dhcp giaddr Verifying Dhcp giaddr ActivationMC-577 Configuring ToD Service Setting Service OptionsSetting Optional IP Parameters Verifying ToD ServiceVerifying IP Multicast Echo Activating IP Multicast EchoActivating IP Broadcast Echo MC-579Verifying IP Broadcast Echo Configuring Cable ProfilesConfiguring Cable Modulation Profiles MC-580Number profile MC-581Configuring QoS Profiles Verifying Cable Modulation ProfilesMC-582 Verifying QoS Profiles MC-583Verifying QoS Permission Setting QoS PermissionEnforcing a QoS Profile Assignment MC-584Managing Cable Modems on the HFC Network Verifying a QoS Profile AssignmentMC-585 Activating Cable Modem Authentication Configuring Sync Message IntervalConfiguring Telco Return Verifying Sync Message IntervalVerifying Cable Modem Authentication Activating Cable Modem Upstream Address VerificationMC-587 Verifying Cable Modem Upstream Address Verification CMTS01config-if#cable source-verify dhcpActivating Cable Modem Insertion Interval 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 Ping Docsis Using Ping DocsisVerifying that Cable Modem Counters are Cleared MC-593Spectrum Management Configuration Example MC-594Virtual Private Network Configuration Example MC-595MC-596 Ip http server Ip http authentication local No cdp run MC-597VoIP Configuration Example MC-598MC-599 Ip subnet-zero No ip domain-lookupTelco Return Configuration Example MC-600Cable telco-return enable MC-601MC-602 QoS Profile Enforcement Configuration ExampleCable Modem all reset Cable RegCMTS01config# cable flap-list aging days Troubleshooting Using Cable Flap ListsSetting Cable Flap List Aging MC-603Verifying Cable Flap List Aging Setting Cable Flap List Insertion TimeSetting Cable Flap List Power Adjustment Threshold Verifying Cable Flap List Insertion TimeCMTS01config# cable flap-list miss-threshold misses Setting Cable Flap List Miss ThresholdVerifying Cable Flap List Power Adjustment Threshold Verifying Cable Flap List Miss ThresholdVerifying Cable Flap List Size Setting Cable Flap List SizeClearing Cable Flap List MC-606
Related manuals
Manual 88 pages 21.59 Kb