Re: STP Root port Eligibility

From: Bryan Bartik (bbartik@ipexpert.com)
Date: Thu Mar 26 2009 - 14:09:06 ART

Divin,

Thanks for the link, that explains it perfectly. Is that not what we want in
this scenario? Perhaps I am misunderstanding the task.

-Bryan

On Thu, Mar 26, 2009 at 11:00 AM, Bryan Bartik <bbartik@ipexpert.com> wrote:

> 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
> 

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

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