Digital isolation between Ethernet hub and streamer

My LAN is already smooth  thanks!

I have tried:

1. Network Acoustics Eno Streaming System. Did it do something ? Yes! It smoothed out dynamics, tamed the highs and relaxed the mids. Soundstage collapsed. None of the effects were desirable and I sold it

2. Fiber optic conversion - adds glassy and cold character. Didn’t mike it

3. iFi LAN iSilencer - made zero difference or if it did make a difference I can’t hear it. Because it does no harm I left it in my system 

Other than using the best possible Ethernet cable and keeping your network components out of your system and plugged into a different circuit, there’s nothing else to do with Ethernet. 

@luvtubes69 I was describing my experience in my system and I thought that was implied. 
I used the stuff I bought from amazon 

https://a.co/d/5HkmxgC

I set up my streaming with EERO mesh network. My Purist Audio Ethernet cable is 1m in length. It is connected to iFi gizmo on the EERO side and feeds my streamer directly.
My audio components are on two dedicated lines - one for Boulder 866 integrated amp, another for Aurender N200 streamer and Bricasti M3 DAC. 
The EERO mesh node is at least 1m away from my components and cables and it is plugged into a completely different circuit so there’s no chance for the EERO SMPS to contaminate the AC line my system is plugged into and near zero EMI and RFI pollution from it due to its proximity to the rest of my gear.

Ethernet cables make a difference, sometimes for the better, sometimes for the worst. Adding additional crapola to my system, converters, filters and switches is unnecessary clutter that contains boxes that generate additional EMI, RFI and AC line noise. That’s my personal approach after testing various tweaks and I won’t be revisiting this in the foreseeable future. I’d rather direct funds to upgrading components and cables than to fart around with network. 
 

Lol yeah. I tried the wrong FMC stuff. I also tried plenty of wrong power cords and they’re no longer in my system. If power doesn’t make a difference in your system but network tweaks do, there’s something seriously wrong with your network and your equipment. 
 

No @richardbrand you misunderstood me. The EERO mesh node produces a good amount of EMI and RFI. The location where it is parked prevents it from interfering with my components and cables. I use an EMF meter to position components in such way that the EMI is minimal or nonexistent around and between the components and cables in my system to the best of my ability working with what I have. 
You hold a lot of knowledge and experience. But see, the way you come across is I’m beginning to build a perception when I read your posts that you think that everyone here is a moron. You need to rethink this approach. Most of us here have been at it for quite some time. And our systems are assembled based on research, knowledge and experience we accumulated over the years. Hope this helps clear at least some of the misconception you arrived with.

What I said originally was

near zero EMI and RFI pollution from it due to its proximity to the rest of my gear.

meaning it does not pollute my system. On its own it produces a good amount. I have to chew this for you?

Then you stated this

I tried measuring the effect of lifting my dustcover and surprised myself with the lack of attenuation of pink noise, compared with white noise

Well I have been measuring the effects of your removing your dust cover and my findings are there is definitely no attenuation of noise. My recommendation is - keep your dust cover on. Especially on your keyboard.