From: Tarun Pahuja (pahujat@gmail.com)
Date: Fri Oct 26 2007 - 08:17:13 ART
Rich,
The following document would answer all your questions:
Basically, if you try to mix rapid-pvst+ with pvst+ you will not able
to take full advantage of rapid-pvst+. Majority of PVST+ enhancements
are already built into rapid-pvst+.
You can run both in the network during the migration phase, but you
would not able to enjoy faster convergence offered by rapid-pvst+.
HTH,
Tarun
On 10/25/07, Rich Collins <nilsi2002@gmail.com> wrote:
> Hi Tarun,
>
> I don't have immediate access to any switches so I was wondering as Nicky
> asked whether there are any other caveats with mixing PVST+ and RSTP
> switches together (other than UplinkFast and BackboneFast)?
>
> thanks
> Rich
>
> On 10/24/07, Tarun Pahuja <pahujat@gmail.com> wrote:
> >
> > Nicky,
> >
> > Rapid-PVST uses the existing configuration for PVST+; however, Rapid-PVST
> > uses RSTP to provide faster convergence. Independent VLANs run their own
> > RSTP instance.
> >
> > Dynamic entries are flushed immediately on a per-port basis upon receiving
> a
> > topology change.
> > UplinkFast and BackboneFast configurations are ignored in Rapid-PVST mode;
> > both features are included in RSTP.
> >
> > HTH,
> > Tarun Pahuja
> > CCIE#7707(R&S,Security,SP,Voice,Storage),CCSI
> >
> >
> > On 10/24/07, nicky noname <cisco2study@gmail.com> wrote:
> > >
> > > Hello,
> > > Hello,
> > >
> > > I am wondering if people have played much with Rapid PVST+. I plan to
> lab
> > > it
> > > up today, but It would be good to hear of possible problems running
> PVST+
> > > and rapid PVST+ side by side. I have been reading about it and it seems
> to
> > > be pretty straight forward. You need to enable the spanning tree mode
> > > globally though right.......you can't just do this for one vlan.
> > > .......and
> > > what happens when you want each switch to be backup roots for each other
> (
> > > one is running in PVST+ and the other in Rapid PVST+)..........can you
> do
> > > that?
> > >
> > > Thanks
> > >
> > >
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