we are planning the installation of ~300 duct mounted switches in a building with an existing fiber to the desk cabling (62,5Âµm) in order to implement VoIP with PoE.
The duct mounted switches have 4 RJ45 ports, 1 RJ45-Uplink and 1 SFP-Uplink.
Unfortunately, new TP-cabling is not possible.
At the moment there are 2 Cat4000 Access-Switches with sufficient 100FX Ports in this building.
One customer request is a redundant design to the "access-layer" (absurd, I know...), that means:
Cat4000(1) <--> DMS(1) <--> DMS(2) <--> Cat4000(2)
with the part in the middle 150 times...
(Of course there is also a connection between the Cat4000s).
Now my question:
Are there any recommendations how to design something like that?
And: How many switches should be at most in one RSTP-Domain?