configuration for port 4/g33 and g5 look correct.  Are you sure the switches are interconnected via these ports?  The M6348 does not have an external display for the stacking ports so it is easy to be connected to the wrong switch in a stack.

How are you determining that there is no connection?

Hello, i try ping command.

Hello, I found the solution but it is not satisfying.

Ping command works when I will disconnect the cable with LAN from the IP's.

If LAN is connected to test IP's working only in range  closest switch, when i unplug LAN cable ping works on all swiches.

Any solutions?

Hi,

Can you explain what's going on in more details? What are you pinging and from where? When ping is missing?

Hello,

This drawing presents my installation picture.

When i try ping between 10.1.1.10 and 10.1.1.11 , works.

When i try ping between 10.1.1.10 and 10.1.1.8 , does not work.

Hi,

What about pinging in 192.168.50.X subnet? Is it always fine?

And did you connect standalone switches together?

I disabled 192.168.0.0/24 subnet. Online is only 10.1.1.0/24.

Do you mean that there is only one switch active at this moment (on the right side)?

Can you look at interfaces status connected in trunk on both switches? Are both of them up? Are they in forwarding state in spanning tree?