Re: IST

Hi Dennis!

Did you check out Petr's blogs on the subject? They have been well
received.

http://blog.ine.com//2008/07/27/mstp-tutorial-part-i-inside-a-region/comment-page-1/

Even though we are not used to talking about CST support on Cisco
switches - remember this is an IEEE thing - not a Cisco thing. To
quote Cisco themselves, "the IST instance is simply an RSTP instance
that extends the CST inside the MST region." The entire MST region
ends up looking like a single switch in the CST.

I think our direct concerns regarding this for the lab exam would of
course be in the Core Knowledge section.

Warmest Regards,

Anthony J. Sequeira, CCIE #15626
http://www.INE.com

On Jul 11, 2009, at 7:17 PM, Dennis Worth wrote:

> Hi Group,
> I am looking for clarification on IST in an MST environment. Based
> off of my
> reading, I am to assume that this spanning-tree rendition is only
> related to
> the single MST REGION, but it passes information between other
> regions which
> is kind of transparent to actually running spanning-tree between the
> regions.
>
> I am very confused, I think, or am...
>
> Thanks for any help you can provide.
>
> --
> Dennis Worth
>
>
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Received on Sat Jul 11 2009 - 20:50:09 ART