Cisco Systems uBR7200 manual Verifying Cable Modem Insertion Interval, MC-589

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Configuring Headend Broadband Access Router Features

Managing Cable Modems on the HFC Network

modem to join the network is known as initial ranging. The default insertion interval setting (automatic) configures the Cisco uBR7200 series to automatically vary the initial ranging times available to new cable modems that attempt to join the network.

Note Use the default setting if a large number of cable modems might attempt to perform initial ranging at the same time; for example, after a major power failure.

To configure the cable modem insertion interval, use one of the following commands in cable interface configuration mode:

Command

 

Purpose

 

 

CMTS01(config-if)#cable insertion-interval automatic

Configures the Cisco uBR7200 series to automatically

or

 

vary the initial ranging times available to new

 

cable modems that attempt to join the network.

 

 

CMTS01(config-if)#cable insertion-interval min

msec

Sets the minimum insertion interval in milliseconds

or

 

(ms). Valid minimum range is from 25 to 200 ms.

 

Default = 50 ms.

 

 

CMTS01(config-if)#cable insertion-interval max

msec

Sets the maximum insertion interval in milliseconds.

 

 

Valid maximum range is from 500 to 2000 ms.

 

 

Default = 2000 ms.

 

 

 

To ignore any minimum or maximum insertion intervals and return to the automatic setting, enter the no cable insertion-intervalcommand.

Verifying Cable Modem Insertion Interval

To verify that a cable modem insertion interval has been set, enter the more system:running-configcommand and look for a notation in the cable interface configuration information as shown in this command output excerpt:

CMTS01# more system:running-config

Building configuration...

Current configuration:

!

interface Cable6/0

ip address 1.1.1.1 255.255.255.0 no keepalive

cable insertion-interval 2000

cable downstream

annex B

cable downstream

modulation 64qam

cable downstream

interleave-depth 32

cable downstream

symbol-rate 5056941

cable upstream 0

frequency 15008000

cable upstream 0

fec

cable upstream 0

scrambler

no cable upstream 0 shutdown

Cisco IOS Multiservice Applications Configuration Guide

MC-589

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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-524MC-525 QoS FeaturesService Class Profiles Multiple Service IDsMC-526 TAG/NetFlow SwitchingQoS Profile Enforcement MC-527 Tag SwitchingNetflow Switching Committed Access Rate CAR Security FeaturesWeighted Random Early Detection Weighted Fair QueueingMC-529 Cable Modem and Multicast Authentication Using RadiusDocsis Baseline Privacy Upstream Address VerificationMC-530 Traffic Shaping FeaturesOperations and Provisioning Features Dynamic RangingCPE Limitation Downstream Channel ID ConfigurationBurst Profile Configuration Downstream Frequency OverrideSpectrum Management MC-533 Headend Broadband Access Router Configuration PrerequisitesMC-534 Headend Broadband Access Router Configuration TasksActivating the Downstream Carrier Configuring the Downstream Cable InterfaceCMTS01# configure terminal CMTS01config# interface cable 6/0MC-536 Setting the Downstream Center FrequencyTroubleshooting Tips Verifying the Downstream CarrierMC-537 CMTS01config-if#cable downstream frequencyVerifying the Downstream Center Frequency MC-538 Setting the Downstream Channel IDSetting the Downstream Mpeg Framing Format Annex B Verifying the Downstream Channel IDMC-539 Setting the Downstream ModulationVerifying the Downstream Mpeg Framing Format Verifying the Downstream ModulationMC-540 Setting the Downstream Interleave DepthCMTS01config-if#cable downstream interleave-depth Verifying the Downstream Interleave DepthMC-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 Channel-width width Setting the Upstream Channel WidthVerifying Upstream Channel Width MC-546MC-547 Setting the Upstream Input Power LevelMC-548 Verifying the Upstream Input Power LevelActivating Upstream Admission Control Verifying Upstream Admission ControlMC-549 Activating Upstream FECMC-550 Router# more systemrunning-configSpecifying Upstream Minislot Size Verifying Upstream FECMC-551 Activating the Upstream ScramblerVerifying Upstream Minislot Size MC-552 CMTS01config-if#cable upstream usport scramblerCMTS01# more systemrunning-config Verifying the Upstream ScramblerMC-553 Activating Upstream Differential EncodingActivating Upstream Rate Limiting Verifying Upstream Differential EncodingMC-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 Continue seconds Activating Upstream Timing AdjustmentVerifying Upstream Power Adjustment MC-557MC-558 Verifying Upstream Timing AdjustmentActivating the Upstream Ports MC-559 Setting Upstream Backoff ValuesVerifying the Upstream Ports Data-backoff automatic CMTS01config-if#cable upstream usport rangeMC-560 Data-backoff start endMC-561 Configuring and Activating Baseline PrivacyVerifying Upstream Data Backoff Automatic MC-562 Configuring KEK PrivacyCMTS01config-if#cable privacy kek grace-time MC-563 Configuring TEK PrivacyVerifying KEK Privacy Verifying TEK PrivacyMC-564 Configuring and Activating Frequency AgilityActivating Baseline Privacy Verifying Baseline PrivacyMC-565 Combiner GroupsMC-566 Frequency Management PolicyMC-567 Determining the Upstream Ports Assigned to a Combiner GroupMC-568 Configuring and Activating Spectrum GroupsCreating Spectrum Groups Verifying Spectrum GroupsMC-569 Command PurposeMC-570 MC-571 Verifying Spectrum Group ConfigurationVerifying Frequency Hopping MC-572 Configuring Spectrum Group CharacteristicsThreshold percent Verifying Spectrum Group CharacteristicsCMTS01config# cable spectrum-group groupnum hop MC-573Verifying Spectrum Group and Upstream Port Assignments Activating IP Address Resolution ProtocolAssigning the Spectrum Group and the Upstream Ports Activating Cable ARP RequestsMC-575 Activating Host-to-Host Communication Proxy ARPVerifying ARP Requests Verifying Cable Proxy ARP Requests Configuring Dhcp OptionsActivating Cable Proxy ARP Requests Activating Cable Relay AgentMC-577 Activating Dhcp giaddrVerifying Dhcp giaddr Activation Verifying ToD Service Setting Service OptionsSetting Optional IP Parameters Configuring ToD ServiceMC-579 Activating IP Multicast EchoActivating IP Broadcast Echo Verifying IP Multicast EchoMC-580 Configuring Cable ProfilesConfiguring Cable Modulation Profiles Verifying IP Broadcast EchoMC-581 Number profileMC-582 Configuring QoS ProfilesVerifying Cable Modulation Profiles MC-583 Verifying QoS ProfilesMC-584 Setting QoS PermissionEnforcing a QoS Profile Assignment Verifying QoS PermissionMC-585 Managing Cable Modems on the HFC NetworkVerifying a QoS Profile Assignment Verifying Sync Message Interval Configuring Sync Message IntervalConfiguring Telco Return Activating Cable Modem AuthenticationMC-587 Verifying Cable Modem AuthenticationActivating Cable Modem Upstream Address Verification MC-588 CMTS01config-if#cable source-verify dhcpActivating Cable Modem Insertion Interval Verifying Cable Modem Upstream Address VerificationMC-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 MC-593 Using Ping DocsisVerifying that Cable Modem Counters are Cleared Verifying Ping DocsisMC-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 Reg QoS Profile Enforcement Configuration ExampleCable Modem all reset MC-602MC-603 Troubleshooting Using Cable Flap ListsSetting Cable Flap List Aging CMTS01config# cable flap-list aging daysVerifying Cable Flap List Insertion Time Setting Cable Flap List Insertion TimeSetting Cable Flap List Power Adjustment Threshold Verifying Cable Flap List AgingVerifying Cable Flap List Miss Threshold Setting Cable Flap List Miss ThresholdVerifying Cable Flap List Power Adjustment Threshold CMTS01config# cable flap-list miss-threshold missesMC-606 Setting Cable Flap List SizeClearing Cable Flap List Verifying Cable Flap List Size
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