Root Port Election

[bunjiega]

I have a simple question about the Root Port Election... I know the path cost is added to the root path cost when the BPDU is recieved, but is the root port decision made with or without the path cost added?
-For example.. For SW2, which port would be the root port? I would want to say that it would be port 2 becuase it has the lower cost of 8 rather than the directly connected cost of 100! It would be quicker for frames to take the physically longer way becuase the speed is much higher. Is this correct?

[Reza Sharifi · Accepted solution]

Yes, the port with lowest path cost to the root bridge become the root port and that port will always be forwarding.  In your case it is the 1Gig port and not the 100Mb.

HTH