From: Richard Anderson (richard.p.anderson@sbcglobal.net)
Date: Fri Oct 08 2004 - 16:45:19 GMT-3
Hi Scott,
The (2) 6513 are the Core switches. I have at least (50) 3750-48/24 port
switches which will be scattered through 23 IDFs. Having said that each IDF
will have about (5 - 6) 3750 switches in CasCading technology. I will then
have 2 Uplink ports from each IDF connecting to each 6513 switches. The (2)
6513 will also be doing VLAN Load Balancing with HSRP redundancy so it means
that each IDF will have (1) Forwarding Uplink and (1) Blocking uplink ports
to Core switches.
I agree with Alexei's answer that PVST will be a better choice. The only
benefit with MST is that a faster convergence with least commands. But PVST
can also provide the faster convergence by simply turning on the features
such as Backbone Fast and Uplink Fast.
Any Comments?
Richard
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'Richard Anderson'" <richard.p.anderson@sbcglobal.net>;
<ccielab@groupstudy.com>
Sent: Tuesday, October 05, 2004 7:26 AM
Subject: RE: MST vs PVST
> With 2 switches, the first question is "does it make a difference to
> you?"... How is this designed? It doesn't seem like there's much of a
loop
> involved, which is what spanning tree is designed to avoid!
>
> So if there's no loop, then who cares?
>
> If you have multiple links joining your two switches (are there ONLY two
> switches? Or more hanging off?), why aren't you considering etherchannel
> bundle for better load balancing? Multiple ports, single logical link, no
> loops.
>
> If you have other switches, then your choice may be made for you depending
> on what your lowest common denominator switch supports. Not everything
> supports MST yet.
>
> Two switches doesn't make a "large network" which is why I ask.
Otherwise,
> look at the two technologies involved, what each does and what benefits
you
> like/need better! This is a design issue, which means there is no
globally
> "right" answer. It also means that you border on what most of us do for a
> living as a consultant as opposed to a config/study question for the CCIE!
> (smirk)
>
> Assess your needs and design first, then ask/answer the technology
question.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
> JNCIP, et al.
> IPExpert CCIE Program Manager
> IPExpert Sr. Technical Instructor
> swm@emanon.com/smorris@ipexpert.net
> http://www.ipexpert.net
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Richard Anderson
> Sent: Tuesday, October 05, 2004 1:00 AM
> To: ccielab@groupstudy.com
> Subject: MST vs PVST
>
> I will be configuring a Large network consists of atleast 50 VLANS. There
> will be 2 (6513) switches with InterVlan Routing. I will also be
> configuring InterVlan Routing, VLAN Load Balancing and HSRP.
>
> What will be the better configuration option. PSVT+ or MST.
>
> Please Advise,
>
> Regards,
>
> _______________________________________________________________________
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