[c-nsp] Tuning MST (MSTP)

[Alexandra Alvarado]

Hello,

Thanks for your answer!

I only have one router (cisco 7513), behind of its I have 2 Linux connected
(with fault tolerance) to a catalyst 3550 switch (root stp).  The default
gateway of my clients is one of my linux.

Alexandra Alvarado


----- Original Message ----- 
From: "Patrick Coppinger" <pcoppinger at corp.earthlink.net>
To: "Alexandra Alvarado" <aaaa at telconet.net>; <cisco-nsp at puck.nether.net>
Sent: Thursday, August 12, 2004 8:32 AM
Subject: Re: [c-nsp] Tuning MST (MSTP)


>
> If you have redundant routers in front of your LANs (running HSRP ?) you
> might want to have each router be STP root for half of the VLANs to load
> balance the networks. Seperating them into 2 MST instances is a good way
to
> achieve this and also simplify your config
>
> At 09:00 PM 8/11/2004 -0500, Alexandra Alvarado wrote:
>
> >Hello,
> >
> >The company where I work has a layer 2 networks, to have loop free, we
> >have been configured
> >STP, but now STP is not enough because it only support 128 instance it
> >means 128 vlans.
> >I need to configure more than 128 vlans, that's why I'm going to move to
> >MST to group all
> >4094 vlans in 1 or 2 instance MST.
> >
> >My questions:
> >
> >1.- I read "By default, all VLANs are mapped to instance 0.". I want to
> >divide my vlans in 2
> >instance:
> >
> >         instance 0 : Vlan 1-10
> >         instance 1: Vlan 11-4094
> >
> >What is de advantage to manage all vlans in 1 instace?, or is better to
> >divide the vlans in more
> >the one instance.
> >
> >If I use 2 instance inspite 1 MST instance the broadcast wil reduce?
>
> Patrick Coppinger
> Network Engineer, CCNP
> Earthlink, Inc
>