Re: Spanning-tree root port selection

I don't see how the lowest BID ties into electing a root-port on a non-root
bridge. The election so far as I know is based on what you originally
said. If I am incorrect, please reference some documentation.

On Tue, Sep 15, 2009 at 2:54 PM, Anantha Subramanian Natarajan <
anantha.natarajan_at_gravitant.com> wrote:

> Hi Guarav,
>
> Thanks for the response.Actually the below mentioned is true for all,but
> when all those tied,which may be in the case where the topology in which
> hub
> is in between and the non-root bridge is having 2 connections to it.In that
> scenario,I am understanding that the local port id would be choosed as tie
> breaker.If that is wrong,kindly correct me again.
>
> Thanks for the help
>
> Regards
> Anantha Subramanian Natarajan
>
>
>
> On Tue, Sep 15, 2009 at 1:36 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com
> >wrote:
>
> > Small error ...
> >
> > Correct one is
> >
> > Lowest BID
> > Lowest root path cost
> > Lowest sender Bridge Id
> > Lowest sender Port Id
> >
> > HTH
> > Gaurav Madan
> > CCIE
> >
> > On Tue, Sep 15, 2009 at 11:58 PM, Anantha Subramanian Natarajan
> > <anantha.natarajan_at_gravitant.com> wrote:
> > > Hi All,
> > >
> > > When I went through LAN Switching Book,I understood the below(Please
> > > correct me,If I am wrong)
> > >
> > > In the below scenario(Same Hub)
> > >
> > > SW1(Root Bridge) ---------Hub --------- SW2
> > > Hub ----------SW2
> > >
> > > When SW2 tries to calculate its root port to the root bridge,by default
> > all
> > > the parameters(Path cost,sender bridge-id,port ID information SW1) all
> > > ties,the SW2 uses it *local port ID* for the tie breaker. Is my
> > > understanding right ? If so,when a question comes to describe a root
> port
> > > selection ,should I need to mention this also like as below
> > >
> > > 1)Highest Root path cost
> > > 2)Lowest sender bridge-id
> > > 3) Lowest sender Bridge port ID
> > > 4)* Lowest local port ID ,if all the above Tie*
> > > **
> > > Kindly correct me if I am wrong.
> > >
> > > Thank you very much
> > >
> > > Regards
> > > Anantha Subramanian Natarajan
> > >
> > >
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-- 
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