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Catalyst 3500 Gigabit Stacking

If I take 4 Catalyst 3500 Series Switches and configure in a GigabitStack Module then I would assume that I am creating a one virtual switch and all the backplanes of the switches should combine the total speed of switching backplane. Am I correct or it is a samething you are connecting two swiches through crossover and dividing the bandwidth.

If my assumptions are correct then the STP should run only on those ports which will be uplink to (2) 6509 layer 3 switches. One in forwarding mode and the other one in blocking mode. The GigabitStack ports between the four switches should not be in either a forwarding or blocking port since they are just being used to creat a one big virtual switch from the 4 seperate physical switches.

If my assumptions are incorrect then what is the benefit of using stacking modules and diving the bandwidth instead of combining them. I would then rather connect each 3500 directly to 6509 switch.


New Member

Re: Catalyst 3500 Gigabit Stacking

A GBIC stack is just a 1Gbps uplink not what you were stating. You could tie each one directly to the 6509 but this eats up a lot of expensive ports on the 6509.

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