Re: Spanning-tree root port selection

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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Received on Wed Sep 16 2009 - 00:06:33 ART