RSTP port types

Unanswered Question
Sep 26th, 2008

Hi all, when we talk about rstp, we have 2 types of port edge and point to point, what is the difference between these ?

I have this problem too.
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Giuseppe Larosa Fri, 09/26/2008 - 07:08

Hello Carl,

a point-to-point port is a port where another switch is expected (STP partner here)

an edge port = access port where an end user device is expected (no STP partner here)

It is very important to classify edge ports in order to help RSTP to achieve the fastest convergence.

Hope to help


carl_townshend Fri, 09/26/2008 - 07:19

Hi there

So what is the difference between these ports? any spanning tree settings etc, as both ports listen and send bpdu's?

Giuseppe Larosa Fri, 09/26/2008 - 07:35

Hello Carl,

no BPDUs are expected on edge ports : PCs don't send them

so the portfast settings and concept can be used on edge ports.

point-to-point ports: here STP BPDUs are expected and the handshake mechanism of RSTP can used to negotiate port role and state with the neighbor

Hope to help



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