Activating IP Multicast Echo, MC-579 | Cisco Systems uBR7200

Configuring Headend Broadband Access Router Features

Setting Optional IP Parameters

Activating IP Multicast Echo

The Cisco uBR7200 series echoes IP multicast packets by default. To activate IP multicast echo if it has been previously disabled, use the following command in cable interface configuration mode:

Command	Purpose

CMTS01(config-if)#cable ip-multicast-echo	Enables IP multicast echo. This is the default.

To disable IP multicast echo, enter the no cable ip-multicast-echocommand in cable interface configuration mode.

Verifying IP Multicast Echo

To verify whether IP multicast echo has been activated or deactivated, enter the more system:running-configcommand and look for the cable interface configuration information. If IP multicast echo is activated, there is no notation in the output as this is the default setting. If IP multicast echo has been deactivated, a notation appears in the output as shown in the following 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

no cable ip-multicast-echo cable insertion-interval 150000 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

Troubleshooting Tips

To troubleshoot the configuration, make sure you entered the correct slot and port numbers when you entered cable interface configuration mode.

Activating IP Broadcast Echo

By default, the Cisco uBR7200 series does not echo IP broadcast packets. To activate IP broadcast echo, use the following command in cable interface configuration mode:

Command	Purpose

CMTS01(config-if)#cable ip-broadcast-echo	Enables IP broadcast echo.

Cisco IOS Multiservice Applications Configuration Guide

MC-579

Image 61

Cisco Systems uBR7200 Activating IP Multicast Echo, Activating IP Broadcast Echo, Verifying IP Multicast Echo, MC-579

Contents

MC-519 Configuring Headend Broadband Access Router Features MC-520 Headend Overview Topology of a Typical Broadband Network Voice over IP Services MC-523 Telco Return TOD MC-524 Service Class Profiles QoS FeaturesMultiple Service IDs MC-525 QoS Profile Enforcement TAG/NetFlow SwitchingMC-526 Netflow Switching Tag SwitchingMC-527 Weighted Random Early Detection Security FeaturesWeighted Fair Queueing Committed Access Rate CAR Docsis Baseline Privacy Cable Modem and Multicast Authentication Using RadiusUpstream Address Verification MC-529 Operations and Provisioning Features Traffic Shaping FeaturesDynamic Ranging MC-530 Burst Profile Configuration Downstream Channel ID ConfigurationDownstream Frequency Override CPE Limitation Spectrum Management MC-533 Headend Broadband Access Router Configuration Prerequisites MC-534 Headend Broadband Access Router Configuration Tasks CMTS01# configure terminal Configuring the Downstream Cable InterfaceCMTS01config# interface cable 6/0 Activating the Downstream Carrier Troubleshooting Tips Setting the Downstream Center FrequencyVerifying the Downstream Carrier MC-536 Verifying the Downstream Center Frequency CMTS01config-if#cable downstream frequencyMC-537 Setting the Downstream Mpeg Framing Format Annex B Setting the Downstream Channel IDVerifying the Downstream Channel ID MC-538 Verifying the Downstream Mpeg Framing Format Setting the Downstream ModulationVerifying the Downstream Modulation MC-539 CMTS01config-if#cable downstream interleave-depth Setting the Downstream Interleave DepthVerifying the Downstream Interleave Depth MC-540 Verifying the Downstream Helper Address Setting the Downstream Helper AddressMC-541 MC-542 Setting Downstream Rate Limiting Verifying Downstream Rate Limiting Configuring the Upstream Cable InterfaceMC-543 MC-544 Setting the Upstream Frequency MC-545 Verifying the Upstream FrequencyCMTS01# show controllers cable 6/0 u0 Verifying Upstream Channel Width Setting the Upstream Channel WidthMC-546 Channel-width width MC-547 Setting the Upstream Input Power Level Activating Upstream Admission Control Verifying the Upstream Input Power LevelVerifying Upstream Admission Control MC-548 MC-549 Activating Upstream FEC Specifying Upstream Minislot Size Router# more systemrunning-configVerifying Upstream FEC MC-550 Verifying Upstream Minislot Size Activating the Upstream ScramblerMC-551 CMTS01# more systemrunning-config CMTS01config-if#cable upstream usport scramblerVerifying the Upstream Scrambler MC-552 Activating Upstream Rate Limiting Activating Upstream Differential EncodingVerifying Upstream Differential Encoding MC-553 Verifying Upstream Rate Limiting CMTS01config-if#no cable upstream usport rate-limitMC-554 Frequency-adjust averaging percentage Activating Upstream Frequency AdjustmentMC-555 Verifying Upstream Frequency Adjustment Activating Upstream Power AdjustmentMC-556 Verifying Upstream Power Adjustment Activating Upstream Timing AdjustmentMC-557 Continue seconds Activating the Upstream Ports Verifying Upstream Timing AdjustmentMC-558 Verifying the Upstream Ports Setting Upstream Backoff ValuesMC-559 MC-560 CMTS01config-if#cable upstream usport rangeData-backoff start end Data-backoff automatic Verifying Upstream Data Backoff Automatic Configuring and Activating Baseline PrivacyMC-561 CMTS01config-if#cable privacy kek grace-time Configuring KEK PrivacyMC-562 Verifying KEK Privacy Configuring TEK PrivacyVerifying TEK Privacy MC-563 Activating Baseline Privacy Configuring and Activating Frequency AgilityVerifying Baseline Privacy MC-564 MC-565 Combiner Groups MC-566 Frequency Management Policy MC-567 Determining the Upstream Ports Assigned to a Combiner Group Creating Spectrum Groups Configuring and Activating Spectrum GroupsVerifying Spectrum Groups MC-568 MC-569 Command Purpose MC-570 Verifying Frequency Hopping Verifying Spectrum Group ConfigurationMC-571 MC-572 Configuring Spectrum Group Characteristics CMTS01config# cable spectrum-group groupnum hop Verifying Spectrum Group CharacteristicsMC-573 Threshold percent Assigning the Spectrum Group and the Upstream Ports Activating IP Address Resolution ProtocolActivating Cable ARP Requests Verifying Spectrum Group and Upstream Port Assignments Verifying ARP Requests Activating Host-to-Host Communication Proxy ARPMC-575 Activating Cable Proxy ARP Requests Configuring Dhcp OptionsActivating Cable Relay Agent Verifying Cable Proxy ARP Requests Verifying Dhcp giaddr Activation Activating Dhcp giaddrMC-577 Setting Optional IP Parameters Setting Service OptionsConfiguring ToD Service Verifying ToD Service Activating IP Broadcast Echo Activating IP Multicast EchoVerifying IP Multicast Echo MC-579 Configuring Cable Modulation Profiles Configuring Cable ProfilesVerifying IP Broadcast Echo MC-580 MC-581 Number profile Verifying Cable Modulation Profiles Configuring QoS ProfilesMC-582 MC-583 Verifying QoS Profiles Enforcing a QoS Profile Assignment Setting QoS PermissionVerifying QoS Permission MC-584 Verifying a QoS Profile Assignment Managing Cable Modems on the HFC NetworkMC-585 Configuring Telco Return Configuring Sync Message IntervalActivating Cable Modem Authentication Verifying Sync Message Interval Activating Cable Modem Upstream Address Verification Verifying Cable Modem AuthenticationMC-587 Activating Cable Modem Insertion Interval CMTS01config-if#cable source-verify dhcpVerifying Cable Modem Upstream Address Verification MC-588 Verifying Cable Modem Insertion Interval CMTS01config-if#cable insertion-interval automaticMC-589 Verifying the Maximum Number of Hosts Configuring Cable Modem Registration TimeoutMC-590 Verifying Registration Timeout Clearing and Resetting Cable ModemsMC-591 Clearing Cable Modem Counters Verifying Cable Modem Clearing and ResettingMC-592 Verifying that Cable Modem Counters are Cleared Using Ping DocsisVerifying Ping Docsis MC-593 MC-594 Spectrum Management Configuration Example MC-595 Virtual Private Network Configuration Example MC-596 MC-597 Ip http server Ip http authentication local No cdp run MC-598 VoIP Configuration Example Ip subnet-zero No ip domain-lookup MC-599 MC-600 Telco Return Configuration Example MC-601 Cable telco-return enable Cable Modem all reset QoS Profile Enforcement Configuration ExampleMC-602 Cable Reg Setting Cable Flap List Aging Troubleshooting Using Cable Flap ListsCMTS01config# cable flap-list aging days MC-603 Setting Cable Flap List Power Adjustment Threshold Setting Cable Flap List Insertion TimeVerifying Cable Flap List Aging Verifying Cable Flap List Insertion Time Verifying Cable Flap List Power Adjustment Threshold Setting Cable Flap List Miss ThresholdCMTS01config# cable flap-list miss-threshold misses Verifying Cable Flap List Miss Threshold Clearing Cable Flap List Setting Cable Flap List SizeVerifying Cable Flap List Size MC-606