Cisco Systems uBR7200 manual Verifying Upstream Rate Limiting, MC-554

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no cable upstream rate-limit

Configuring Headend Broadband Access Router Features

Configuring the Upstream Cable Interface

To enable upstream rate limiting for an upstream port on a Cisco cable modem card, use one of the following commands in cable interface configuration mode:

 

Command

Purpose

Step 1

 

 

CMTS01(config-if)#cable upstream usport rate-limit

Enables rate limiting for the specified upstream cable

 

or

interface.

 

 

 

 

Enables rate limiting for the upstream cable interface

 

CMTS01(config-if)#cable upstream usport rate-limit

employing the token bucket policing algorithm. With

 

token-bucket

this command the Cisco uBR7200 series will

 

 

 

or

automatically drop packets in violation of allowable

 

upstream bandwidth.

 

 

 

CMTS01(config-if)#cable upstream usport rate-limit

Default. Enables rate limiting for the upstream cable

 

token-bucket shaping

 

interface employing the token bucket policing

 

 

 

 

algorithm with traffic shaping.

Step 2

 

 

CMTS01(config-if)# ^Z CMTS01#

Exits to EXEC mode so that you can verify upstream

 

 

rate limiting.

 

 

 

To disable upstream traffic shaping for an upstream port, enter the following command in cable interface configuration mode:

CMTS01(config-if)#no cable upstream usport rate-limit

Verifying Upstream Rate Limiting

To verify whether or not upstream rate limiting has been configured and activated, enter the show running-configcommand and look for the cable interface configuration information. If upstream rate limiting has been configured and enabled, a rate limiting entry will be displayed in the show

running-configoutput. If upstream rate limiting is disabled,will be displayed in the output.

You can also perform the following tasks to verify that rate limiting is enabled on the upstream channel:

Step 1 Configure a low-peak upstream rate limit for the cable modem in its QoS profile. Either use the CLI to modify the QoS profile, or edit the TFTP configuration file.

Step 2 Use a regular rate-limiting algorithm on the upstream without rate shaping and see the drops of the excess bandwidth requests from this cable modem when it exceeds its peak upstream rate.

Use the show interface cx/y sid counters command to see the bandwidth request drops. See that the upstream rate received by that modem is in fact less than its configured peak rate due to the timeouts and backoffs produced by the drop in bandwidth requests. To see the input rate at the CMTS in bps, enter the show interface cx/y sid command.

Step 3 Enable grant shaping on the upstream channel by using the new shaping keyword extension to the token bucket algorithm CLI command.

Cisco IOS Multiservice Applications Configuration Guide

MC-554

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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 TODQoS Features Service Class ProfilesMultiple Service IDs MC-525TAG/NetFlow Switching QoS Profile EnforcementMC-526 Tag Switching Netflow SwitchingMC-527 Security Features Weighted Random Early DetectionWeighted Fair Queueing Committed Access Rate CARCable Modem and Multicast Authentication Using Radius Docsis Baseline PrivacyUpstream Address Verification MC-529Traffic Shaping Features Operations and Provisioning FeaturesDynamic Ranging MC-530Downstream Channel ID Configuration Burst Profile ConfigurationDownstream Frequency Override CPE LimitationSpectrum Management Headend Broadband Access Router Configuration Prerequisites MC-533Headend Broadband Access Router Configuration Tasks MC-534Configuring the Downstream Cable Interface CMTS01# configure terminalCMTS01config# interface cable 6/0 Activating the Downstream CarrierSetting the Downstream Center Frequency Troubleshooting TipsVerifying the Downstream Carrier MC-536CMTS01config-if#cable downstream frequency Verifying the Downstream Center FrequencyMC-537 Setting the Downstream Channel ID Setting the Downstream Mpeg Framing Format Annex BVerifying the Downstream Channel ID MC-538Setting the Downstream Modulation Verifying the Downstream Mpeg Framing FormatVerifying the Downstream Modulation MC-539Setting the Downstream Interleave Depth CMTS01config-if#cable downstream interleave-depthVerifying the 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 Setting the Upstream Channel Width Verifying Upstream Channel WidthMC-546 Channel-width widthSetting the Upstream Input Power Level MC-547Verifying the Upstream Input Power Level Activating Upstream Admission ControlVerifying Upstream Admission Control MC-548Activating Upstream FEC MC-549Router# more systemrunning-config Specifying Upstream Minislot SizeVerifying Upstream FEC MC-550Activating the Upstream Scrambler Verifying Upstream Minislot SizeMC-551 CMTS01config-if#cable upstream usport scrambler CMTS01# more systemrunning-configVerifying the Upstream Scrambler MC-552Activating Upstream Differential Encoding Activating Upstream Rate LimitingVerifying 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 Activating Upstream Timing Adjustment Verifying Upstream Power AdjustmentMC-557 Continue secondsVerifying Upstream Timing Adjustment Activating the Upstream PortsMC-558 Setting Upstream Backoff Values Verifying the Upstream PortsMC-559 CMTS01config-if#cable upstream usport range MC-560Data-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 Configuring TEK Privacy Verifying KEK PrivacyVerifying TEK Privacy MC-563Configuring and Activating Frequency Agility Activating Baseline PrivacyVerifying Baseline Privacy MC-564Combiner Groups MC-565Frequency Management Policy MC-566Determining the Upstream Ports Assigned to a Combiner Group MC-567Configuring and Activating Spectrum Groups Creating Spectrum GroupsVerifying Spectrum Groups MC-568Command Purpose MC-569MC-570 Verifying Spectrum Group Configuration Verifying Frequency HoppingMC-571 Configuring Spectrum Group Characteristics MC-572Verifying Spectrum Group Characteristics CMTS01config# cable spectrum-group groupnum hopMC-573 Threshold percentActivating IP Address Resolution Protocol Assigning the Spectrum Group and the Upstream PortsActivating Cable ARP Requests Verifying Spectrum Group and Upstream Port AssignmentsActivating Host-to-Host Communication Proxy ARP Verifying ARP RequestsMC-575 Configuring Dhcp Options Activating Cable Proxy ARP RequestsActivating Cable Relay Agent Verifying Cable Proxy ARP RequestsActivating Dhcp giaddr Verifying Dhcp giaddr ActivationMC-577 Setting Service Options Setting Optional IP ParametersConfiguring ToD Service Verifying ToD ServiceActivating IP Multicast Echo Activating IP Broadcast EchoVerifying IP Multicast Echo MC-579Configuring Cable Profiles Configuring Cable Modulation ProfilesVerifying IP Broadcast Echo MC-580Number profile MC-581Configuring QoS Profiles Verifying Cable Modulation ProfilesMC-582 Verifying QoS Profiles MC-583Setting QoS Permission Enforcing a QoS Profile AssignmentVerifying QoS Permission MC-584Managing Cable Modems on the HFC Network Verifying a QoS Profile AssignmentMC-585 Configuring Sync Message Interval Configuring Telco ReturnActivating Cable Modem Authentication Verifying Sync Message IntervalVerifying Cable Modem Authentication Activating Cable Modem Upstream Address VerificationMC-587 CMTS01config-if#cable source-verify dhcp Activating Cable Modem Insertion IntervalVerifying 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 Using Ping Docsis Verifying that Cable Modem Counters are ClearedVerifying Ping Docsis 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-601QoS Profile Enforcement Configuration Example Cable Modem all resetMC-602 Cable RegTroubleshooting Using Cable Flap Lists Setting Cable Flap List AgingCMTS01config# cable flap-list aging days MC-603Setting Cable Flap List Insertion Time Setting Cable Flap List Power Adjustment ThresholdVerifying Cable Flap List Aging Verifying Cable Flap List Insertion TimeSetting Cable Flap List Miss Threshold Verifying Cable Flap List Power Adjustment ThresholdCMTS01config# cable flap-list miss-threshold misses Verifying Cable Flap List Miss ThresholdSetting Cable Flap List Size Clearing Cable Flap ListVerifying Cable Flap List Size MC-606
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