Hopefully someone can help.

Setup:

1 Master Linux Mint XFCE 19.2

3 Nodes Linux Mint XFCE 19.2

All boxes have Mint 19.2 XFCE

All have updates

All have static IP's

All on same subnet

Have all connected to a dumb switch

All Running Blender 2.80

All have cr_021_bl280 installed

All have same network configurations

When I create the nodes I can see it trying to connect then it either fails or does nothing under "Connect" or Resync". Clicking on each node and trying to "Connect" or "Resync" only seems to be acknowledging only one node and ignores the others

I had Blender 2.81 installed and had node sync issues. I thought maybe 2.81 was the problem

Downloaded 2.80 and installed. Same issues

The issue that I am having is that under Blender 2.81 and now 2.80, I cannot get more that 1 node to sync.

No more than three Blender processes running on each machine at a time

None of the nodes are in a suspended or sleep mode

Swapped switch to test. Same issue

I do have Vino-Server running on the Nodes now, but even before I installed it, I had the same issue

I am including some screen captures from the Master and from Node XFCE-3 connections

Any ideas?