From: marc fernandez (mag08036@yahoo.com)
Date: Fri Jan 12 2007 - 21:18:39 ART
Ronnie,
In PVST+ if you remove a vlan, other vlans
spanning-tree
is not affected.
In MST, if you remove one vlan from say instance 2
(even vlans) will all of the vlans that belong to that
instance be affected by the change?
In other words will only the single vlan be affected
or will the whole instance (all vlans part of that
instance) have to go thru spanning-tree reconvergence?
-marc
--- Ronnie Angello <ronnie.angello@gmail.com> wrote:
> There would be little or no manual configuration
> necessary because PVST+ is
> enabled by default (Cisco switches). For basic
> optimization, root bridge
> placement and configuration of spanning-tree
> portfast on access ports would
> need to be done either way. You wouldn't have to
> configure separate STP
> instances and assign vlans to them. PVST+ is less
> scalable though since
> your switch will run a separate STP instance for
> every single VLAN.
>
> Once you have configured a significant number of
> vlans and you have need for
> optimal configuration with load balancing vlans over
> trunks, then you should
> consider MSTP. If load balancing vlans is
> absolutely necessary for you,
> even with just a few vlans, this can be done with
> less configuration via
> MSTP.
>
> Ronnie
>
>
> On 1/12/07, marc fernandez <mag08036@yahoo.com>
> wrote:
> >
> > In a real life scenario. What would be the pros
> and
> > cons, advantages or disadvantages in PVST+ vs.
> MST
> > if the topology only had a few vlans as apposed to
> > hundreds of vlans.
> >
> > Regards,
> >
> > Marc
> > mag08036@yahoo.com
> >
> >
> >
> >
> >
>
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