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Multi-Switch Considerations for AMP VLAN


Overview

If the Right Switch for the system requires more than one switch, AMP VLAN supports up to 63 switches in a single system.

Those switches need additional considerations:

  • All switches in the system must be from the SAME MANUFACTURER, but may be different models.
  • Switches must have 10Gb SFP+ ports.
  • Copper or fiber SFP+ cables connect the switches together.
  • The switches pass data between them over trunk connections and link aggregation groups.
  • Switch 1 must have 1 port reserved - the last RJ45 port - for network connection. All other ports on all other switches can be filled with Just Add Power devices.

Supported Switches

Luxul

Model Ports On POE Devices per Switch SFP+ Ports
SW-610-24P-R Rear 24 4
SW-610-48P-F Front 48 4

Netgear

All Netgear GSM models have rear-facing ports. Switches marked with a "U" have much more POE than is needed for a Just Add Power system, but can be used if the "P" version is unavailable.

Model POE Ports Devices per Switch SFP+ Ports
GSM4212PX 8 10 2
GSM4212UX 8 10 2
GSM4230PX 24 26 4
GSM4248PX 40 40 8
GSM4248UX 40 40 8

Cisco

All Cisco CBS350 models have front-facing ports.

Model POE Ports Devices per Switch SFP+ Ports
CBS350-24P-4X 19 24 4
CBS350-24FP-4X 24 24 4
CBS350-48P-4X 37 48 4
CBS350-48FP-4X 48 48 4

All TP-Link models have front-facing ports

Model POE Ports Devices Per Switch SFP+ Ports
TL-SG3428XMP 24 24 4

Stack vs Trunk

AMP VLAN supports multi-switch systems in trunk topology.

Please see Stacking vs Trunking for more information.


Bandwidth Considerations

When multiple switches are used, the video bandwidth usage for Transmitters needs to be considered as the cables that connect switches have a maximum bandwidth capability that is much lower than a single switch.

To estimate Just Add Power Transmitter bandwidth usage:

Generation Average Bandwidth* Recommended TX per Gb
2GΩ/3G 400 Mbps 2.5
3G 500 Mbps 2
Max Color 850 Mbps 1

*Actual bandwidth will depend on source resolution, framerate, colorspace and content. The peak bandwidth output of a 3G Transmitter is 850 Mbps, most often during boot-up and source switching. The peak bandwidth output of a MaxColor Transmitter is 850 Mbps.

The number of SFP+ ports on each switch, combined with the number of switches in the system determine how many SFP+ links can be made between switches. AMP VLAN builds two links between each switch so that switches can be linked together as many as are needed.


SFP+ Cables

Connecting multiple switches together requires a specialized cable, and cannot be carried over typical CatX wiring.

Most SFP cables are compatible, regardless of the manufacturer.

You can find SFP modules on Luxul's website, Cisco's website, Netgear's website, or you can use 3rd-party modules.

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  • 23-May-2022
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