RE: spanning-tree port-priority

Also remember that port priority is only checked if you have multiple links that have the same upstream Bridge-ID. In other words you can only use port priority if you have multiple links to the same upstream switch. If you have three switches connected in a triangle the port-priority will not affect any portion of the election or path selection.

HTH,

Brian McGahan, CCIE #8593 (R&S/SP/Security)
bmcgahan_at_INE.com
 
Internetwork Expert, Inc.
http://www.INE.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of dia.aliou_at_gmail.com
Sent: Sunday, December 09, 2012 2:39 PM
To: marc abel
Cc: Cisco certification; marc edwards; Mohammad Khalil; benali.amin_at_gmail.com
Subject: Re: spanning-tree port-priority

Both parameters are used to influence RP/DP selection. Path cost takes precedence over port priority. This latter is used to influence port selection on a downstream switch.

On 9 Dec 2012 20:25, "marc abel" <marcabel_at_gmail.com> wrote:

Ah but if you apply both priority and cost which one wins?

On Sun, Dec 9, 2012 at 11:54 AM, marc edwards <renorider_at_gmail.com> wrote:

> >
> > Speaking from the switch perspective, we make change on a switch
> > upstream that influences the ...
>
> >
> > On Sun, Dec 9, 2012 at 9:51 AM, marc edwards <renorider_at_gmail.com>
> wrote:
> > > When we talk upstr...
>
> > Blogs and organic groups at http://www.ccie.net
> >
> > ______________________________________________...
>

--
Marc Abel
CCIE #35470
(Routing and Switching)
Blogs and organic groups at http://www.ccie.net