Re: Spanning-tree root port selection

Gaurav,

Can you clarify this please? I don't recall the BID having anything to do
with selecting the root port on a bridge...Where did you get that
information ?

On Tue, Sep 15, 2009 at 2:36 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
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
Blogs and organic groups at http://www.ccie.net