Wyrestorm NetworkHD 200 series Use and care manual

Copyright © 2018 WyreStorm Technologies | Product specifications or appearance subject to change without notice.
NetworkHD™Technical Reference Guide
NetworkHD™100 | 200 | 400 | 600 Series
Document Revision:
v1.1
Document Date:
April 9th 2018
Supported Firmware:
v1.0.0 or higher

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Contents
Overview ........................................................................................................................................3
System Components ...................................................................................................................... 3
Controller (CTL) ..................................................................................................................................................................................... 3
Encoders ................................................................................................................................................................................................. 4
Decoders................................................................................................................................................................................................. 4
NetworkHD Series Encoder/Decoder Comparison......................................................................................................................... 5
NetworkHD Touch™.............................................................................................................................................................................. 6
NetworkHD Console Software............................................................................................................................................................ 6
Application Scenarios .................................................................................................................... 7
One to One Scenario - Single Encoder and Decoder...................................................................................................................... 7
One to Many Scenario - Single Encoder to Multiple Decoders..................................................................................................... 7
Many to Many Scenario - Multiple Encoders and Decoders ........................................................................................................ 8
Multiple Images on a Single Display (Multiview) ............................................................................................................................ 8
Single Image Spread Across Multiple Displays (Video Walls)...................................................................................................... 8
System Design Guidelines and Requirements ..............................................................................10
Preparation for Design and Installation ..........................................................................................................................................10
Powering NetworkHD Components ................................................................................................................................................10
System Cooling and Airflow ..............................................................................................................................................................10
Software/Firmware.............................................................................................................................................................................10
Mounting/Installation.........................................................................................................................................................................11
Source & Display Settings .................................................................................................................................................................11
AV Input Compatibility........................................................................................................................................................................11
AV Output Compatibility.....................................................................................................................................................................11
Control Signal Compatibility..............................................................................................................................................................12
System Infrastructure Guidelines and Requirements ...................................................................13
AV Cabling Guidelines ........................................................................................................................................................................13
Testing & Certifying a Network Cabling Infrastructure ................................................................................................................13
Choosing an Ethernet Switch............................................................................................................................................................13
Basic Switch Parameters ..............................................................................................................................................................13
Preconfiguring an Ethernet Switch..............................................................................................................................................13
Required Network Switch Features.............................................................................................................................................14
Packet Routing ................................................................................................................................................................................14
Ethernet switch configuration ......................................................................................................................................................15
Using multiple Network switches ................................................................................................................................................16
NetworkHD Stream Bandwidth ....................................................................................................................................................19
Multiple VLAN NetworkHD ............................................................................................................................................................20
Switch Operation Verification ...........................................................................................................................................................20
Installation Checklist ...................................................................................................................21
System Configuration Preparation ..................................................................................................................................................21
Troubleshooting ..................................................................................................................................................................................22
Contacting Technical Support ......................................................................................................22
Appendixes ..................................................................................................................................23
Revision History ...........................................................................................................................27
Publication Disclaimer .................................................................................................................27

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Overview
NetworkHD™is a robust and highly scalable AV over IP solution designed for the distribution of audio, video and control
signals over a standard IP Network. The truly modular nature of the NetworkHD system allows an AV distribution of a
hugely scalable number of sources and displays to be created over a standardized cabling infrastructure and a
managed Network switch topology.
To achieve this NetworkHD consists of three compression technology options –each with its own set of advantages.
NetworkHD 100 & 200 series utilizes the highly efficient, low-bandwidth H.264 standard for AV compression and
features CEC & RS-232 capabilities. They also support 1080p and HDCP.
NetworkHD 400 Series leverages JPEG200 compression to provide a “visually lossless” 4K image with very low latency.
Support for 4K, HDR, HDCP2.2 and multichannel audio is also included.
NetworkHD 600 series is powered by SDVoE technology. This allows for mathematically identical audio and video to be
distributed over a 10Gb network segment. With support for 4K/60Hz 4:4:4, 4K/60 HDR, HDCP2.2, multichannel audio
and discreet audio the 600 series is a premium, lossless AVoIP solution.
System Components
NetworkHD comprises of a combination of hardware and software common to all NetworkHD Series components. This
unified approach removes the need to learn different setup methods across the NetworkHD family. This helps to reduce
system design times and offers a known platform from which an Integrator can specify any NetworkHD Series,
focusing instead on the concerns of the deployment.
Controller (CTL)
The NHD-000-CTL is the heart of a NetworkHD AVoIP system, it provides the interface point that act as a control bridge
for the encoders and decoders allowing for the selection of content and displaying it at the end point. With features like
auto discovery of all NetworkHD components, intuitive Web-based user interface (UI), and the ability for 3rd party control
the CTL provides the power that makes the NetworkHD system one of the most simple and quickest-to-configure
AVoIP systems available.
Whether using the NetworkHD Console configuration software, the built in Web UI, NetworkHD touch, or 3rd party
control system all communications to NetworkHD traverse through the CTL. Only a single CTL is required per system.

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Encoders
NetworkHD TX Encoders enable the transmission of AV signals onto the network. Source components such as Set-top
boxes, PCs, Blu-ray and media players are connected and their signals are converted into network packets for
transmission over the Local Area Network (LAN).
Every NetworkHD Encoder supports the direct connection of HDMI devices and DVI-D (via adapter), while other
connection types are available on other products.
•NetworkHD 200 series adds Component (YPbPr) and VGA (RGBHV) video sources.
•NetworkHD 600 series also introduces native DisplayPort connectivity.
•NHD-SW-0501 series includes HDMI and VGA connections.
Analog audio de-embedding is available on all encoders with the additional ability on the 200 and 600 Series to inject
analog source audio.
Decoders
NetworkHD RX Decoders receive the A/V stream from the TX Encoders over the Network and convert the signal to
HDMI. This allows the content to be used via HDMI on Visual Display Units (VDU) such as TVs, monitors or projectors
as well as HDMI/analog audio processors.
Through optional video resolution scaling, frame-rate conversion and color-space conversion, NetworkHD decoders
output content that can be formatted correctly for the connected display. This allows for content to be shown using
optimum video requirements without affecting the source transmission.
Analog audio de-embedding is available on all decoders with the additional ability on the 400 Series to utilize discrete
audio source switching and advanced audio matrixing on the 600 Series decoders.

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NetworkHD Series Encoder/Decoder Comparison
100 Series
200 Series
400 Series
600 Series
Audio + Video
Video Compression Codec
H.264
H.264
JPEG 2000
SDVoE
Max. Resolution
1920x1200 @60
1920x1200 @60
2160p @60 4:2:0
2160p @30 10-bit (HDR)
2160p @60 4:4:4
10-bit (HDR)
Latency
60ms (low latency mode)
250ms (high quality mode)
60ms (low latency mode)
250ms(high quality mode)
16ms (60fps)
33ms (30fps)
0ms (GenLock Mode)
1~2 frames (Scaler Mode)
Instant Switching
Yes
Yes
No
Yes
Bit Rate
0.5-40Mbps Configurable
0.5-40Mbps Configurable
150-850Mbps
10Gbps
HDCP
1.4
1.4
2.2
2.2
Multi-channel Audio
No
No
Yes
Yes
Preview Stream
Yes
Yes
Yes
No
Analog Audio Out
Yes
Yes
Yes
Yes
Analog Audio In
No
Yes
No
Yes
Audio Switching Only
No
No
Yes
Yes
Control
NHD-000-CTL
Yes
Yes
Yes
Yes
RS-232
Yes
Yes
Yes
Yes
CEC
Yes
Yes
Yes
No
IR
No
No
Pass-through
Yes
Features
Video Wall
No
10x10 (NHD-210-RX)
16x16
5x5
Image Flip/Rotate/Scale
No
No/No/Yes
Yes
No/No/Yes
Multi-View
No
NHD-220-RX/NHD-250-RX
No
Yes
Power
PoE
Yes
Yes
Yes
No

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NetworkHD Touch™
The NetworkHD Touch™App for iPad is available as a free download on the App Store. It allows instant deployment of
drag-and-drop control for NetworkHD AV switching, Video Walls and Multiview. By communicating with the NetworkHD
configuration file stored on the CTL, NetworkHD Touch can be configured with minimal setup.
NetworkHD Touch does not require a separate control system or Driver allowing for instant control deployment of
simple display control and system verification checks. By adding integration to a WyreStorm Enado control processor,
NetworkHD Touch can utilize more advanced equipment control.
Watch the NetworkHD Touch product video on our YouTube channel to see how easy it is to use.
NetworkHD Console Software
NetworkHD Console is a software configuration tool for Windows PCs enabling the configuration of NetworkHD
components and the construction of A/V matrix switching, video walls or Multiview displays for use in projects.
It is also ideal for configuring “set & forget” systems where a control system is not required. It offers fast, powerful
configuration options and an intuitive UI for setting up all system settings whilst helping build a collection of video-wall
and Multiview configurations for use with capable NetworkHD components.
NetworkHD Console is part of the WyreStorm Management Suite configuration tool which contains other tools for
configuring NetworkHD as well as other WyreStorm products. It is available on the website via the product pages.
Visit the Management Suite page for more information.

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Application Scenarios
NetworkHD can be used for a variety of applications ranging from simplistic single source to single VDU or complex
multiple source to multiple VDUs scenarios. The number of end points in a deployment can be scaled after the fact by
adding/removing encoders and decoders as needed.
One to One Scenario - Single Encoder and Decoder
In the simplest of installation scenarios, a single encoder and decoder can be linked directly or via the LAN, to send
video from a source to a display in another location. If linked directly the devices must each be powered with the
supplied external power supply and the Ethernet cable linking them should not run more than the Ethernet standard
dictates, depending on the cable type used and installation environment.
The encoder and decoder may not automatically connect and must first be connected via an NHD Controller and/or the
Console software application. This will require connection to a managed Network switch although once linked the
devices can then be connected directly.
One to One Switch Connection
One to One Direct Connection
One to Many Scenario - Single Encoder to Multiple Decoders
Using NetworkHD components for one to many installations dramatically decreases the amount of equipment required
at the source location. NetworkHD can be used to form a virtual “distribution amplifier” for source equipment.

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Many to Many Scenario - Multiple Encoders and Decoders
The truly modular nature of the NetworkHD system topology allows an AV distribution with a hugely scalable number of
sources and displays. NetworkHD can be used to form a virtual “matrix switch” for AV and control signals to and from
source and sink equipment.
Multiple Images on a Single Display (Multiview)
Going above single images on a display, NetworkHD can also render images from multiple encoders onto a single
display, this is known commonly as Multiview. Not all decoders support this functionality and there are differences in
the modes supported. Refer to the table below for products and available modes.
Multiview Modes
NHD-220-RX
NHD-250-RX
NHD-600-RX (See Note)
Simple Grid Modes
X
X
X
Hybrid Grid Modes
X
X
X
Video Windowing/Tiling
X
X
PiP , PaP
X
X
Arbitrary Layouts
X
X
Note: Multiview functionality is not available on NHD-600 upon initial release. Functionality will be added via a future
firmware update.

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Single Image Spread Across Multiple Displays (Video Walls)
In addition to AV and Control matrix switching, NetworkHD can also be used in video wall scenarios to display a single
image across multiple displays. Each panel in the wall requires an RX decoder in order to display the image. Not all
decoders support this functionality and there are differences in the number of panels that can be used. Refer to the
tables below for products and available modes.
Video Wall Features
NHD-210-RX
NHD-400-RX
NHD-600-RX ( See Note)
Maximum Number of Displays
10x10
16x16
5x5
Image Stretch
X
X
X
Display Bezel Compensation
X
X
Image Rotation
X
Genlock Synchronization
X
Note: Video Wall functionality is not available on NHD-600 upon initial release. Functionality will be added via a future
firmware update.
Video Wall Wiring

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System Design Guidelines and Requirements
While NetworkHD is easy to configure and install there are some guidelines and requirements that make the system
operate to their optimum level. By following this section, a NetworkHD deployment can be designed, configured, and
operated at its optimum performance level.
Preparation for Design and Installation
Build the system and test all components before attending the installation site. Doing so will find any issues before
moving to the less flexible and time sensitive environment of the install itself. Knowing that a unit was configured
properly before installation makes it far easier to pinpoint the cause of the problem, saving time and money for your
business.
WyreStorm offers several resources to improve the effectiveness of the preparation stages, we recommend that these
items are downloaded and utilized before starting any system design, configuration, and/or installation.
•Latest version of NetworkHD Firmware
•Latest version of the WyreStorm Management Suite required to configured a NetworkHD system.
•Switch Configuration Guides for a wide array of popular network switches.
•Switch Mapping Worksheets for recording IP addresses and alias names.
•3rd Party Drivers for a wide array of popular control systems.
Powering NetworkHD Components
A majority of NetworkHD components support PoE standards which minimizes the use of external power supplies and
allows for centralizing the power distribution for the components. This not only reduces the cable count at various
stages, but also enhances the effectiveness of labor time on site. When utilizing PoE be sure to observe the power
requirements of the quantity of NetworkHD components connected to a Network switch and ensure this is within the
PoE power budget and in accordance with the standards provided by a Network Switch.
System Cooling and Airflow
Ineffective thermal considerations can have a detrimental effect on the lifetime of electronic products. Ensure proper
passive or active cooling strategies are used to ensure heat is moved away from the components allowing them to
remain within their operating temperatures. Poor positioning of components or installation of cables may attribute to
creating hotspots that trap heat, whenever possible avoid placing cables in areas that will prevent air from reaching the
components limiting proper cooling.
NetworkHD rack-mount kits (NHD-000-RACK | NHD-000-RACK2 | NHD-000-RACK3) have been designed to allow for
optimal mounting and cooling of the NetworkHD equipment within an AV rack. We recommend that these are used in
order to ensure a clean installation that also allows for proper thermal performance. Should the installation not allow for
the use of a rack-mount kit, the encoders and decoders should never be positioned flat against a shelf or stacked on top
of each other. Each component should have at least 1.5in/38.1mm of clearance should be left on the top and sides of
the NetworkHD components to ensure adequate airflow is maintained.
Software/Firmware
Where possible WyreStorm ships all components with the most up to date firmware, however before starting any
installation the firmware in the components should be verified to be the latest. This will allow for the components to
operate properly and ensure that the latest features are available. We also recommend that the firmware version on all
third-party hardware, particularly Network switches and TVs, is verified to be the latest as well. Refer to the relevant
manufacturers content for information on how to obtain and install any new firmware required.

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Mounting/Installation
The correct mounting of devices, particularly in the unforgiving environment of an AV or IT rack is vital to any
successful installation. When mounting devices using the included wall brackets, observe the orientation of the device
conforms to the correct method to allow for secure mounting and proper cooling.
For AV and IT racks, WyreStorm offers rack mount kits to allow for quick and easy installation that provides a clean
properly ventilated installation. All rack mount kits provide a steel housing that can be used in a central and secure
location for the components.
NHD-000-RACK is designed for use with 100/200 series encoders
NHD-000-RACK2 is designed for 100/200/400 series encoders
NHD-000-RACK3 is designed for 600 series encoders and decoders
Source & Display Settings
WyreStorm NetworkHD components use the highest quality encoding available to provide efficient distribution across a
large number of video and audio endpoints. However, the video quality starts with and depends on the source content
being encoded. The following guidelines apply to any and all encoding within a NetworkHD system.
•NetworkHD 100/200 series use H.264 compression that is not compatible with interlaced sources. Ensure that
all source content is set to Progressive scan (e.g. 720p/1080p) and not interlaced (e.g. 1080i). Interlaced
content is supported on the 400 & 600 series which use JPEG2000 or SDVoE compression respectively.
•Low power modes should be disabled on the displays and sources to ensure the system is always supplied
with content. If a display shows no image, ensure the source device or display device has not entered a power-
saving mode or is in a standby mode.
•Enabling CEC for all displays ensures that NetworkHD can power them on and off making them available to
display an image when the system is accessed. This setting maybe called something other than CEC and is not
always enabled by default. Refer to the technical information for the display for details. NetworkHD utilizes a
specific subset of CEC power commands, One Touch Play and Standby that may not be supported by all third-
party equipment vendors.
•Overscan or “smart” aspect ratio settings should be disabled in any display that is part of a video wall, if it is
enabled the image may not be a correct representation. This setting is almost always enabled by default and
often hidden in advanced settings menus. Refer to the technical information for the display for details on how
to disable it. Video wall displays should have video scan or aspect ratio processing disabled as well.
•Bezel adjustments for video walls exist only on NetworkHD 400 and 600 series products and can be configured
using the NetworkHD Console Software. When using NetworkHD 200 series for video wall processing, it is best
to utilize displays with minimal bezels. Screens with advanced picture adjustments can also be used to ensure
an image is properly aligned.
•Ensure that displays or other HDMI sinks used are fully compatible with the signal type used. The NetworkHD
decoders feature a video scaler which can influence a signal presented to a display, depending on the scaler
settings used. Refer to Appendix A.2 for details of the NetworkHD output signals.
AV Input Compatibility
The NetworkHD family supports standardized input video/audio attributes at an encoder. Details such as supported
input resolutions, frame rate, bit depth, color-space, chroma subsampling, HDR, audio type and audio channels are
specific to each NetworkHD series and are listed in the product pages found at WyreStorm.com. Please ensure that the
correct NetworkHD Series is chosen for the intended connected source device at each encoder.
Refer to Appendix A.1 for a table showing the input attributes available for the NetworkHD family.
AV Output Compatibility
The NetworkHD family support standardized HDMI output attributes at a decoder. Details such as supported output
resolutions, frame rate, bit depth, color-space, chroma subsampling, HDR, CEC, audio type and audio channels are
specific to each NetworkHD series and are listed in the product pages found at WyreStorm.com. Please ensure that the
correct NetworkHD Series is chosen for the intended connected HDMI sink device at each decoder.
Refer to Appendix A.2 for a table showing the output attributes available for the NetworkHD family.

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Control Signal Compatibility
In addition to AV signals, the NetworkHD family support the routing/switching, and in some cases the generation of
common control data types such as RS-232, Infrared, CEC and Ethernet.
Refer to Appendix A.3 for the control signal attributes available for the NetworkHD family.

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System Infrastructure Guidelines and Requirements
Ensuring the correct infrastructure is key to a successful NetworkHD deployment. Read through and follow the
information provided in this section to allow for successful deployment and operation of a NetworkHD system.
AV Cabling Guidelines
Due to the ever-changing technologies for transmission and increases in content bandwidth, preparing for changes at
the time of installation is advisable.
As signal bandwidth increases, useable AV or control cable lengths can decrease. To avoid connectivity issues due to
cable length, ensure connected AV or control devices are located as close to NetworkHD components as possible. Refer
to the relevant standards for the signal type used (e.g. HDMI, RS-232 etc.)
Testing & Certifying a Network Cabling Infrastructure
While WyreStorm products are manufactured and tested to the highest standards, the installation environment can
have an adverse effect on system performance. WyreStorm recommends that Network each cable is not only tested for
correct termination but is also certified to conform to the relevant Network bandwidth, crosstalk and interference
standards for each link distance required before installation of NetworkHD components.
Refer to the Required Network Switch Features section for information regarding the Network connection to a
NetworkHD device.
Choosing an Ethernet Switch
The flexibility of a WyreStorm NetworkHD solution brings AV distribution into the Network domain. Many Network
switch vendors exist but the interoperability of any Network depends on the support of various Network standards.
WyreStorm NetworkHD products take advantage of well-established, common Network standards found built into the
majority of managed switches.
The guidance that follows is intended to give various details on the Network standards required of a switch selected for
use with NetworkHD. Refer to the NetworkHD Switch Configuration Guides located on WyreStorm.com for detailed,
vendor-specific Switch information when choosing and configuring a network switch.
Basic Switch Parameters
The main features of a selected Network switch depend on the NetworkHD devices used:
NetworkHD 100/200/400 Series
1GbE switch
Layer 2+ / Layer 3
NetworkHD 600 Series
10GbE switch
Layer 2+ / Layer 3
It should be noted that most 10GbE switches support backward compatibility with 1GbE devices.
Preconfiguring an Ethernet Switch
Network switches directly connected to NetworkHD components should always be configured prior to connecting any
components. Due to the encoder’s instant-on feature, a multicast stream could disrupt the expected behavior of a
switch if it is not configured to accept multicast traffic in advance.
WyreStorm offers a library of Switch Configuration Guides documents specific to many tested Network switches to help
reduce set-up times.
NetworkHD 100/200/400 Series components have subtle differences to the 600 Series. Although all NetworkHD
multicast operation is the same, the NetworkHD 600 Series requires a 10Gb infrastructure rather than the typical 1Gb.
This means that the WyreStorm recommended switches for 100/200 & 400 may not be common to the 600 Series and
a separate list of recommendations exist.
As the NetworkHD solution is inherently scalable it is recommended that a switch is purchased that will have more
Ethernet ports than NetworkHD devices so that more can be quickly added in the future where required.

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Required Network Switch Features
Switch Ports
The WyreStorm NetworkHD family devices utilize twisted pair cable Ethernet standards. The Ethernet switch port
connecting directly to a NetworkHD device therefore must support the following:
NHD-000-CTL:
1Gb/s Full-duplex
1000Base-T
IEEE 802.1ab
NHD 100, 200 and 400 Series:
1Gb/s Full-duplex
1000Base-T
IEEE 802.1ab
NHD 600 Series:
10Gb/s Full-duplex
10GBase-T
IEEE 802.1an
Jumbo Frames
Switches for the 400 Series must support Jumbo frames, specifically with an MTU size ≥ 9000 bytes.
Additional Switch Features
•Multicast forwarding or filtering
•IGMP v2 Snooping
•IGMP Querier
•IGMP v2 Fast-leave
Packet Routing
To enable the transmission of a source to multiple destination, NetworkHD devices make use of Multicast. The default
behavior of purely layer 2 Ethernet switch is to broadcast those packets. This means that every packet will be
transmitted to all possible destinations.
This is why any network switch used with NetworkHD has to support IGMP Snooping. NetworkHD devices use the
IGMP protocol to assign the devices into multicast groups and the switch uses IGMP snooping to efficiently route
multicast packets only to decoders that want to receive them.
Many switches have the IGMP Snooping feature disabled by default and manual configuration is required. Often, a
simple check mark near “Enable IGMP Snooping”is the only thing needed to enable IGMP Snooping. However, the
implementation of IGMP Snooping is vendor specific and more configuration is often needed.
An Ethernet switch can be informed that a device wants to leave a multicast channel by sending it a IGMP LEAVE
GROUP packet. Once received, the time it takes for the switch to apply the new configuration may vary from one switch
to the other. Most switches implement and include a FASTLEAVE configuration option. When enabled, it takes much
less time for a particular switch port to leave a multicast group and to assign the port to a different multicast group. The
end result is a noticeably shorter video switching time.
A selection of Ethernet switches exist that are pre-configured for NetworkHD packet routing by default. In this situation,
for a pure NetworkHD system, the switch is simply plug-and-play out of the box. This only applies to single switch
deployments however and further NetworkHD device setup will still be required.
Refer to the NetworkHD Switch Recommendations document located on wyrestorm.com for a list of plug-and-play
switches currently supported.

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Ethernet switch configuration
The following list includes all network switch configuration options that WyreStorm engineers have come across so far.
NetworkHD data is typically contained in one VLAN. Look for these or similar options when configuring your switch.
Feature
Setting
IGMP Snooping
•Must be enabled
IGMP Snooping on VLAN 1
•Must be enabled when all ports default to VLAN 1
•Other VLAN IDs can be used so long as Snooping is enabled
Filter/Drop unregistered Multicast traffic
•If not applied, the behavior of the switch will be to broadcast multicast
packets if the switch has no known destination for that packet
•Must be enabled if found
Unregistered Multicast Flooding
•Must be disabled if found
IGMP Querier
•Must be enabled, if found
•For VLAN1 - Must be enabled, if found
•Must be set to IGMP v2
•Multiple switch topologies may require this to be disabled on some
switches
See Using the IGMP Querier Function for more information.
FASTLEAVE on port (x) and VLAN1
•Should be enabled for single switch deployments, if found
•Multiple switch topologies may require this to be disabled on some
switches
See Using the FASTLEAVE Function for more information.
Green or Energy Saving feature
•Must be disabled, if found
PoE on port X (IEEE 802.3af)
•Optionally enabled, if found
Refer to the NetworkHD Switch Configuration Guides located on wyrestorm.com for detailed, vendor-specific Switch
information.
Using the IGMP Querier Function
In order for IGMP, and thus IGMP snooping, to function, a multicast router or IGMP Querier function on a switch must
exist on the network and generate IGMP queries. The tables created for snooping (holding the member ports for each a
multicast group) are associated with the Querier. Without a Querier the tables are not created and snooping will not
work. Furthermore, IGMP general queries must be unconditionally forwarded by all switches involved in IGMP snooping.
Some IGMP snooping implementations found on many switches include full Querier capability.
One IGMP Querier should exist on a NetworkHD VLAN. In multiple switch deployments for example, when cascaded
switch topologies exist, only one switch should enable the Querier function with it disabled on all other switches.
Using the FASTLEAVE Function
An Ethernet switch can be informed that a NetworkHD device wants to leave a multicast group by the device sending
the switch an IGMP LEAVE packet. When a switch receives an IGMP V2 leave message from a NetworkHD device, it
sends out multiple multicast group-specific queries. If no other NetworkHD device replies within the waiting period, the
switch stops forwarding traffic. When FASTLEAVE is configured, and when the switch receives an IGMP leave message
on a port, it immediately stops forwarding to that port. The switch then does not send multicast group specific-queries.
When FASTLEAVE is configured on a switch, you must not have multiple NetworkHD devices connected on any port in
the switch. This includes links between multiple switches.

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Using PoE
Most NetworkHD devices utilize PoE for local power as an alternative to the supplied external power supply adapter.
This can offer centralized power distribution from the switch as well as well as reduction in component count, cable
count and installation labor time.
The power options available to NetworkHD devices is as follows:
NHD-000-CTL
PoE compliant (AV Port) 15.4W IEEE 802.1af or Local DC power supply
NHD 100/200/400 Series
PoE compliant 15.4W IEEE 802.1af or Local DC power supply
NHD-SW-0501
Integrated AC power supply
NHD 600 Series
Local DC power supply
When selecting a PoE capable switch, the total PoE budget must be considered. For example, some switches can
supply PoE to only a subset of ports when running at 15.4W per port, other switches can support 15.4W on every port
simultaneously. Switch PoE budget can easily be calculated by adding the number of NetworkHD devices that require
PoE.
For example: 24x NHD-210-RX = 370W total switch PoE budget
Using multiple Network switches
When using more than a single Network switch with multicast further configuration options must be considered.
Multiple switch topologies usually employ 2 main methods:
Switch Stacking
A stackable switch is a network switch that is fully functional operating standalone but which can also be set up to
operate together with one or more other network switches, with this group of switches showing the characteristics of a
single switch but having the port capacity of the sum of the combined switches.
•If a switch supports operating in this mode be sure that the configuration guidance shown above applies to the
entire switch stack to ensure unified stack multicast support.
•Often, switch vendors will utilize special port modes for use with stacking and some switches make use of
dedicated stacking ports and cables. These will have a finite bandwidth.

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Switch cascading
Linking switches together, often with links that support a greater bandwidth, is an alternative method by which to
increase the amount of NetworkHD units connected to a system.
Either by using dedicated Trunk ports or aggregated link ports, Network switches can extend the NetworkHD VLAN
across multiple locations using varying topologies. Bandwidth requirements should be considered, with the maximum
peak NetworkHD stream bandwidth required being exceeded by the link segment between switches.
Further Considerations for Multiple Switch Deployments
Ethernet switches that are used for cascaded topologies must also support the following functions:
Dynamic multicast router port
Must be enabled on all switches that do not contain the
IGMP Querier function
Forwarding unknown multicast to multicast router port X
only
Must be enabled on all switches that do not contain the
IGMP Querier function

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Switch Configuration
Feature
Single Switch Networking
Cascading Networking
Core Switch
Extended Switch
Green or energy-saving
feature
Disable
Disable
Disable
Multicast forwarding or
filtering
Enable
Enable
Enable
IGMP Snooping
Enable
Enable
Enable
IP address of IGMP Querier
Must be assigned a valid value
Does not matter
IGMP Querier
Enable
Enable
Disable
IGMP snooping fast leave
Enable
Disable
Enable
Dynamic multicast router port
Disable
Disable
Enable
Forward All unknown
multicast
Disable
Disable
Router port only*
*Port which connects the extended switch back to the switch running an IGMP Querier

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NetworkHD Stream Bandwidth
The NetworkHD encoders transmit AV content at a known bitrate. It is the encoder bandwidth that makes up almost all
of the Network traffic in a VLAN. Each NetworkHD encoder sends multicast stream data at the following peak bitrates:
NetworkHD 100 Series encoder:
30Mb/s
1GbE switch required
NetworkHD 200 Series encoder:
30Mb/s
1GbE switch required
NetworkHD 400 Series encoder:
850Mb/s
1GbE switch required
NetworkHD 600 Series encoder:
10Gb/s
10GbE switch required
When using a single switch with multiple NetworkHD encoders the main consideration is the backplane speed of the
switch which must exceed the bitrate sum of the total number of NetworkHD encoders.
For example: 10x NHD-400-TX = 10x 850Mb/s = 8.5Gb/s total bitrate
When using multiple switches, the considerations extend further, introducing the need to calculate the link speed
between switches. This should be considered both for switch stacks and for other topologies.
For example, when using a core/extended topology, the link speed between switches must exceed the bitrate sum of
the total number of NetworkHD encoders required by decoders on a link segment.

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Multiple VLAN NetworkHD
NetworkHD components typically resides within a single VLAN. By default, many switches will have a single VLAN
(perhaps VLAN ID 1). Unless specifically noted or required, it is not necessary to create an additional VLAN.
The NHD-000-CTL is equipped with dual Ethernet ports so that it can simultaneously connect to two separate networks
or VLANs without the need for additional routing functionality configured within the switch. Both NHD-000-CTL ports
are separately compliant with the NetworkHD control API. This enables a Control network to be completely isolated
from an AVoIP network, whilst connected to the NHD-000-CTL, without further considerations for Network
administration.
Switch Operation Verification
During WyreStorm’s testing, we’ve found that different vendors and models of switches vary in performance when
handling multicast data packets. Therefore, although a switch may meet the previous requirements they may still not be
suitable for use with NetworkHD. A final conclusion can be made through practical function verification and pressure
testing. WyreStorm cannot offer detailed support on switches that are not documented by our library of switch
configuration guides, therefore choosing to use other switch models is done so at the installers own risk.
Refer to the NetworkHD Switch Configuration Guides located on wyrestorm.com for detailed, vendor-specific Switch
information.