From: Tharaka Kariyawasam (tharakak@dini.net)
Date: Mon Apr 09 2007 - 13:21:34 ART
Hi,
Yes, port-priority on a designated port will influence the downstream
bridge's root port election. Changing the port-cost will influence the local
bridge to select a root port among multiple ports connecting to upstream
bridge. Lower priority/cost is better.
Thanks,
TK.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Venkataramanaiah.R
Sent: Monday, April 09, 2007 1:16 AM
To: Digital Yemeni
Cc: Dan C; Tandou Mohamed; ccielab@groupstudy.com
Subject: Re: Spanning-Tree
Isnt this the other way around...? Port priority influences the other switch
downstream to select appropriate port. (It is carried in the BPDU) and cost
influences selection of upstream ports..
On 4/8/07, Digital Yemeni <digital.yemeni@gmail.com> wrote:
>
> Put it this way,
> port-priority is used to affect the local switch to "prefer" a port
> over another AND is locally significant while; Cost is used to affect
> the upstream switch to prefer our port over another port of another
> switch since cost is accumulative throughout the STP domain!
> Thanks to Brian MacGhan for making this VERY CLEAR ;-)
>
>
>
>
> On 4/8/07, Dan C <cdan2154@gmail.com> wrote:
> >
> > Hi Mohamed,
> >
> > STP port-priority you need to use it on the root bridge and cost on
> > the non root bridge. To verify your settings you need to have a look
> > the
> spanning
> > tree on the opposite switch.
> >
> > Cheers, Dan
> >
> > On 4/8/07, Tandou Mohamed <dtandou@yahoo.com> wrote:
> > >
> > > Hello GS,
> > > can someone explain to me when to use spanning-tree
> > > port-priority
> over
> > > spanning-tree cost or vice versa? i read the cisco DoC looks like
> > > both
> > have
> > > same meaning may be i am wrong.
> > >
> > > thanks,
> > >
> > > Mohamed
> > >
> > >
> > >
> > > ---------------------------------
> > > TV dinner still cooling?
> > > Check out "Tonight's Picks" on Yahoo! TV.
> > >
> > >
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>
>
>
> --
> Best Regards!
> Digital, CCIE# to be assigned by Cisco when it collects enough $$ out
> of me!
> :p
>
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