Connecting 22 Switches to a Fiber Switch.

Hello,

We have 22 M4350-48G4XF switches and all connected to a M4350-24F4V which are all VLANs and DHCP is managed by a Frotigate 40F.

Sample Schematic shown below:

The Problem:

So on some switches some ports that connects the Switches together becomes "Blocked" and we are also experiencing Network Drops for 1 or 2 seconds:

Switches:

What could be the issue here and any solution ?

Thanks.

#M4350