TO clarify, does this mean that you should not run STP across gigastack
links? If so, how can one achieve this?
So if I have three switches: Assume SW1, SW2 and SW3 where SW1 and SW2
connect together using gigastack links and SW3 connects to SW1 and SW2 using
multimode fibre SX Gigabit GBICs.
I should run STP on the two fibre links, but not on the gigastack link.
Assuming this is what the paragraph from the previous email means, how will
SW1 and SW2 determine that redundant links to sw3 exist?
> -----Original Message-----
> From: kevin Gannon [mailto:kevin@gannons.net]
> Sent: Wednesday, September 13, 2000 11:16 AM
> To: Desmarais, Jonathan
> Cc: 'cisco-nsp@puck.nether.net'
> Subject: Re: [nsp] [nsp] 3500 XL Spanning Tree problem
>
>
> Make sure that you arent doing something funny
> if you are using Gigastack links as the gigastacks
> are do not run STP across the two ports :(.
>
> Regards,
> Kevin
> > I have three 3500XL's connected together in a triangle
> using GigE.
> > The trunks are ISL but all stp interfaces are
> forwarding, where I am
> > sure one in the triangular network should be blocking.
> Hence one of
> > the switches is having to relearn the 4 Vlans related
> to the network
> > every few seconds. This is causing some performance
> issues. Any Idea's?
> >
> > Regards
> >
> > Jonathan Desmarais
> > jon99@uk.colt.net
> > \C/\O/\L/\T/
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