Replace your dumb router with a smart one. Or place a 1gb switch behind it. Connect both PCs to the switch, and the switch to the dump router.

The NDI packets will travel locally between the switch and only your video stream will pass out over the wireless link.

You might have to manually configure the IP addresses but thats not difficult.

A.

While your certainly need the bandwidth for NDI to operate correctly. Even the fastest wireless can still be an issue because it is a very bursty and subject to interference, both in just noise in the environment but also with all other WiFi clients. Only one client can really be 'talking' to the access point at a time, so if you have lots of WiFi equipment all of that bandwidth is shared, unlike wired where each clients get their own 1GB of bandwidth to/from the switch. Not saying that you can't make this work, but it can be problematic.

Putting a switch behind the Cisco in the pressbox should solve this issue, NDI traffic would then be isolated onto the switch and then only things that need to go over the wireless link would do so. I use this very setup at home for my equipment. All of my demo equipment is downstairs (a TriCaster, 3PLAY, TalkShow, VizRT, NDI apps, etc) and my internet router is upstairs. I haven't run a wired line between the two locations, so I got a WiFi bridge, then put a 1GB switch behind it. All of my NDI gear is on the 1GB switch which allows them all to talk between each other at full 1GB speed and when I go out over the internet only that traffic goes via wireless to the upstairs internet router. I'm even using a unmanaged no-name Ethernet switch to make this work, you could go get a cheap TPLink 5 port 1GB switch and have this all working in no time.

Kane Peterson
NewTek

So is the intent to push NDI out over the rf link.

Looking at the supplied diagram it looks to me like the NDI packets are only flowing between the two PC's. With only the final video streaming out over the radio link.

Maybe the OP can comment on this, as if the NDI connection is locally feeding graphics into the Vmix PC then they only need a switch to connect between the two PC's and the RF link.

A.

NDI only uses multicast for the discovery phase which is low bandwidth. When two devices are transferring video/audio data, unicast transmission is used.

Kane Peterson
NewTek

I don't know. Without exact models of the equipment being used and how it is configured it would be impossible to say. All I could do is make guesses. Perhaps the 'dumb router' in this Cisco wireless unit is only 100mb? In that case, it wouldn't be sending the data over the wireless link, but it would still be maxing out the bandwidth of the Ethernet ports on the unit which might make it look like its using up all of the bandwidth.

Kane Peterson
NewTek

Yes I agree with Kane I am using a Netgear 1GB Ethernet power line, my Virgin Media router is in my living room and my office is upstairs I have run a speed test from my PC in my office and I am getting 130mbps download and 12.40mbps upload speeds, I also have run a speed test from my media centre which is in my living room and connected directly to the router via Ethernet and that gives me the same 130mbps download and 12.40mbps upload speeds.

So I think that is the way to go.

The latency is minimal, no more than another couple of hops across routers, which is really what they are.

The bigger potential issue is buffer bloat. Like any router they buffer traffic.

Broadband reports speed test include a buffer bloat measurement. My Comcast business class service gets A+ when I connect via ethernet. When I use the ethernet-over-power kit is drops to a C, purely on the basis of buffering.

When excessive buffer bloat impacts real-time, bi-directional communication, like phone calls or video conference links. It's less worrisome with respect to streaming video.