Re: STP Root port Eligibility

From: Bryan Bartik (bbartik@ipexpert.com)
Date: Thu Mar 26 2009 - 14:00:14 ART

The task says that the port should never be "root port"...A port becomes
root port when it hears superior BPDUs. How can you block these?

You are not preventing the downstream ports from using this switch as root.

On Thu, Mar 26, 2009 at 10:54 AM, Divin Mathew John <divinjohn@gmail.com>wrote:

> Root guard allows the device to participate in STP as long as the
> device does not try to become the root. If root guard blocks the port,
> subsequent recovery is automatic. Recovery occurs as soon as the
> offending device ceases to send superior BPDUs.
>
> http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b.shtml#diff
>
> Exactly...normal STP will function but.! a New root cannot takeover
> sending BPDU's from that port.! thats all
> Thanking You
>
> Yours Sincerely
>
> Divin Mathew John
> divinjohn@gmail.com
> divin@dide3d.com
> +91 9945430983
> +91 9846697191
> +974 5008916
> PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
>
>
>
> On Thu, Mar 26, 2009 at 10:21 PM, Bryan Bartik <bbartik@ipexpert.com>
> wrote:
> > rt. Even with root guard enabled on one port, other ports can be root po
> 

-- 
Bryan Bartik
CCIE #23707, CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com

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