Cisco 4742HDC Installations- und Betriebsanleitung

MoCA Installation and

Troubleshooting Reference Guide

Overview

Introduction

This document contains installation guidelines, performance verification steps,

and troubleshooting measures for devices that support a multi-room network

over Multimedia over Coax Alliance (MoCA®). Multi-room networks allow client

devices (non-DVR set-tops) to stream content from a server device (DVR set-top)

that has recorded linear content.

Features

Support is provided for the following features on each MoCA device:

 Standard Definition (SD) and High Definition (HD) content

 Between two nodes, a streaming rate of greater than 250 Mbps (PHY rate)

 Trick modes (FF, REW, SLO-MO, and PAUSE)

 Up to three clients per server

MoCA Devices

The information in this guide applies to the following MoCA devices:

DVRs

 9865HDC set-tops

 8742HDC and 8642HDC set-tops

Non-DVRs

 4742HDC and 4642HDC set-tops

 1642HDC set-tops

Purpose

After reading this document, you will understand where to install the MoCA POE

(Point of Entry) filter and MoCA set-tops with respect to cable splitters and

amplifiers. You will also be able to verify links between MoCA set-tops and

troubleshoot faulty installations.

2 TP-00116-01

Installation Basics

Scope

This document does not address MoCA-compliant cable modem gateways. This

document only addresses standalone DOCSIS 2.0 and DOCSIS 3.0 cable modems

that are not MoCA compliant.

Audience

This document is intended for field technicians.

Audience

This document is intended for field technicians.

[

Document Version

This is the third formal release of this document.

In This Document

 Installation Basics .......................................................................................................3

 Home Wiring Examples.............................................................................................4

 Performance Verification...........................................................................................7

 Preventing Interference with Cable Modems.......................................................12

 Installation Problems................................................................................................13

 Troubleshooting........................................................................................................17

 Appendix A ...............................................................................................................19

 Appendix B................................................................................................................22

TP-00116-01 3

Installation Basics

A basic installation procedure involves the following:

 Install the MoCA Point of Entry (POE) filter

 Check QAM levels at each outlet

 Boot the set-tops and verify the MoCA links

These topics are covered in the following sections.

Install POE Filter

The POE filter is a 1002 MHz low-pass filter which is installed at the subscriber drop.

It prevents interference between MoCA devices in homes connected to the same tap.

As shown in Basic Installation (on page 4), you should connect the POE filter

between the ground block and the splitter.

Verify QAM Levels

Verify that the QAM signal level of the highest frequency QAM channel (i. e.,

channel 158) is adequate at each outlet used in the installation. If this is not the case,

the home wiring should be corrected before continuing.

Verify MoCA Links

Set-tops should automatically form a MoCA network after two or more MoCA

devices boot up. Once a set-top has joined the network, its MoCA link indicator*

illuminates (see the front-panel call-outs in the set-top guides listed below):

 Cisco Explorer 9800 Hybrid Video Gateway Series (part number OL-26440-01) for the

9865HDC set-tops

 Cisco Explorer 8640HD, 8642HD, 8650HD, and 8652HD High-Definition DVR Set-

Tops Quick Reference (part number 78-4026879-01) for the 8640HD and 8642HD

set-tops

 Cisco Explorer 8640HDC, 8642HDC, 8650HDC, and 8652HDC High-Definition Set-

Tops with Multi-Stream CableCARD (M-Card) Interface Quick Reference (part

number 78-4026878-01) for the 8642HDC set-tops

 Cisco Explorer 4642HD and 4652HD High-Definition Set-Tops Quick Reference (part

number 78-4029078-02) for the 4642HD set-tops

 Cisco Explorer 4642HDC and 4652HDC High-Definition Set-Tops with Multi-Stream

CableCARD Interface Quick Reference (part number 78-4029076-01) for the

4642HDC set-tops

* The 164x set-tops do not have a MoCA indicator. To verify the MoCA link, you must refer to DRIVERS

- MoCA SUMMARY PG 1 (see Node Summary and Network Summary (on page 8)).

4 TP-00116-01

Home Wiring Examples

The diagrams in this section show home wiring examples that typically provide

good MoCA performance.

Note: As in each of these diagrams, the POE filter should always be installed before

the first split.

Basic Installation

With Cable Modem (Example A)

TP-00116-01 5

Home Wiring Examples

With Cable Modem (Example B)

With Home Amplifier

Important: Home amplifiers can cause MoCA problems. You should use a MoCA-

compliant amplifier when an amplifier is required. (A MoCA-compliant amplifier

has an internal POE filter, as shown in the diagram.)

6 TP-00116-01

Home Wiring Examples

With Long Cable Runs

Note: The POE filter should be as close to the coaxial distribution point as possible.

TP-00116-01 7

Performance Verification

MoCA performance is verified by viewing the set-top diagnostic screens. To enter

diagnostic mode, follow one of the following procedures based on the set-top you

are using.

For 87xx, 86xx 46xx, and 16xx Set-Tops

1Press and hold the set-top power button until the power indicator flashes.

2Release the power button.

3Press the power button again. The first diagnostic page opens.

4Scroll to the MoCA diagnostic screens. The first one is called DRIVERS - MOCA

SUMMARY PG1.

 To scroll through the diagnostic screens, press the set-top volume control

buttons (86xx and 46xx set-tops) or the Page Up/Down buttons on the

remote (164x set-tops).

 To exit diagnostic mode, press the set-top Exit button (86xx and 46xx

set-tops) or the Exit button on the remote (164x set-tops).

Use the following diagnostic information to verify the performance of each MoCA

set-top in the home. Start with the DVR set-top, since its performance is critical to the

non-DVR set-tops that depend on it for multi-room content distribution.

Note: Each set-top is referred to as a MoCA node; a given set-top refers to itself as

the local node. See Appendix A (on page 19) for definitions of all MoCA diagnostic

screen parameters.

For 9865 Set-Tops

1Press and hold the EXIT button on the remote until the power indicator flashes.

2Press the remote down button () twice.

3Press the number 2on the remote. The diagnostic menu opens.

4Scroll down to the Home Networking menu selection (this is where the MoCA

diagnostics are).

 Access the Home Networking pages using the remote left () and right ()

arrows.

 Pages 4 - 7 have useful MoCA diagnostic information.

 To exit diagnostic mode, press the EXIT button on the remote.

8 TP-00116-01

Performance Verification

Node Summary and Network Summary

To view Node Summary and Network Summary statistics, scroll to the first MoCA

diagnostics page, DRIVERS - MoCA SUMMARY PG 1. Then verify the desired field

values as shown in the table.

Field Name

Description

Possible Values

Enable

Indicates whether MoCA is

enabled on this set-top

 True—preferred value

 False

Note: Status is controlled at the

headend.

Brdcast PHY

Rate

Data rate used for packets

broadcast to all other nodes

 [Integer > 0]

Note: Minimum value is 200 Mbps,

lower rates require fixing the home

coaxial wiring.

Wait at least 30 seconds after Link

Up is achieved then verify

Broadcast PHY Rate.

Status

Status of the MoCA network

 Link Up—preferred value

 No Link

 Disabled

Note: Link Up indicates that the

node has successfully joined the

network.

Link Privacy

Indicates the status of Link

Privacy

 Enabled—preferred value

 Disabled

TP-00116-01 9

Performance Verification

Field Name

Description

Possible Values

RF Channel

Channel center frequency of

the MoCA network (in MHz)

 Value: 1150

The RF channel frequency is

typically 1150 MHz. If it is not,

record the frequency for

comparison with other devices on

the network.

Node Statistics

To view Node Statistics, scroll to DRIVERS - MoCA SUMMARY PG 2A and

DRIVERS - MoCA SUMMARY PG 2B. Then verify the desired field values as shown

in the table.

10 TP-00116-01

Performance Verification

Field Name

Description

Possible Values

TX Unicast

PHY Rate

(Mbps)

Transmit rate from the local

node* to each other node in the

network.

 [Integer > 0]

Note: Minimum value is 200 Mbps,

lower rates require fixing the home

coaxial wiring.

Wait at least 30 seconds after Link

Up is achieved.

Broadcast

PHY Rate

(Mbps)

Broadcast rate from each other

node in the network to the local

node*.

 [Integer > 0]

Note: Minimum value is 200 Mbps,

lower rates require fixing the home

coaxial wiring.

Approx Path

Loss (dB)

Approximate loss from each

node to the local node.

 [Integer > 0]

Important: Losses greater than 50

dB requires fixing the home wiring.

*In this example, the local node is 5, noted by the absence of data in the fields adjacent to the

node number.

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