Connecting 2 JGS524Ev2 Smart Switches over single cable - with mirror port to work across both units

Hello.  I have 2 JGS524Ev2 switches on separate floors, with 1 cable.

 

I also have this unit: https://www.dualcomm.com/collections/network-tap/products/gigabit-copper-network-tap, which sits between a router and a modem.

 

My goal is to monitor the output of the DualComm, send into 1 JGS524Ev2 and see the output on my 2nd JGS524Ev2.

 

Let me explain further:

 

Floor 1) I have the output from my DualComm port that I'd like to feed into first JGS524Ev2.

Floor 0) I'd like to see the output from the DualComm come across on my 2nd JGS524Ev2.

 

Reason: Source data is coming from the DualComm (on Floor 1).  Sniffer is on Floor 0.  So, Data and Sniffer are on separate floors.

 

FYI - I have only 1 cable between both JGS524Ev2 units.

 

Can someone help me configure this?  I thought I could accomplish by this:

 

-Set up LAG between both JGS524Ev2 units (seems to work with a single cable).

-Set up VLAN 2 on port 10 of both JGS524Ev2 units.

-Floor 1 - Plug DualComm in port 10 (vlan2)

-Floor 0 - Plug port 10 (vlan2) into port 12 (vlan1), then mirror port 12 to my mirror port on port 2 (vlan1).

 

This does not work.  It actually makes JGS524Ev2 on Floor 0 go offline. (loop?)

 

Any suggestions on how I can accomplish this?  I bought this send JGS524Ev2 for this very purpose, so I'm wondering if it's even possible.

Firmware is the latest (FYI).

 

Thank you.