From: Farrukh Haroon (farrukhharoon@gmail.com)
Date: Sun Dec 24 2006 - 05:04:17 ART
Humayun, PVST means that there is going to be a spanning-tree instance for
each VLAN, as I'm sure you already know. Lets say you have 10 VLANS on your
network, and VLANS 1,2 and 3 share the same switching topology (I mean they
are shared by the same switches), so you could have the same spanning-tree
instance for all those three VLANS thereby saving valuable resources on your
switch. Therefore by using MST you could optimize your switch performance.
MST would calculate the RP,DP,Root Bridge etc for all three VLANs and make
the forwarding and blocking decisions based on that.
On 12/24/06, Humayun Ikram <mhikram@yahoo.ca> wrote:
>
> Hi,
>
> I know for most of you this could be a simple question but I am trying to
> understand at high level the difference between PVST and MST? Why do we
> want to
> use MST when the default is PVST?
>
> Thanks
>
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