Interconnect multiple stacks

[sgewillig]

Hello all,

I'm pretty new to configures Extreme switches (5320 in my case).

At this moment, I have done the following setup.
I have 4 floors, each with a stack (1 with 3 switches and 3 with 4 switches. U1-U2 ports are connected in a ring)
What is the best setup to have network redundancy between the floors?

At this moment my firewall, passes the network to stack 1
Then stack 1 passes the network to stack 2, stack 2 to stack 3 and stack 3 to stack 4)
Between the main floor and the other floors, I do have only 6 copper connections (RJ45)

Any advise is welcome.

[AdrianO]

Your actual topoly its not ideal because there are multiple single point failures posible. Ex stacks 1 goes out, everything falls.

You can do a start topology where the center is your firewall if there are enough copper ports. If not the center could be stack1 on the main floor with trunks to the other stacks. Trunks should be aggregated copper links on diferent slots of each stack. Ex (stack1 lag(1:49 and 2:49)) - (stack2 lag(1:49 and 2:49))

Another topology could be a ring between stacks but it is more complicated.