Re: Why a transit area cannot be a stub area?

Hi Darby,
I was referring a transit area which connects disconnected area's. Sorry for
the confusion.

The question was Why can't we have the area's that have virtual-links to be
a stub area. RFC says you can't " the only reason being if the disconnected
area had ASBR's we have a problem transmitting Type 5 LSA's

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094aaa.shtml#virtuallinks

Please have a look @ line 3 of the first paragraph.." The transit area
cannot be a stub area". I understand it why.. like Scott pointed out.. but I
was hoping if we do not have asbr's in the disconnected area.. there should
be a better answer. Best practice you do not configure it.. but just was
digging around for a better explanation.

-Hoogen

On Mon, Aug 24, 2009 at 4:13 PM, Darby Weaver <darby.weaver_at_gmail.com>wrote:

> Hmm...
>
> I define area a transit Area as "The Transit area" aka Area 0.
>
> Now since Area 0 is connected to every other area it seems contracdictory
> to me and my viewpoint to ever declare it a stub area.
>
> Each area attached to Area 0 sends its information to Area 0.
>
> Virtual-links are an extension of Area 0.
>
> So with all that said... what was the question again?
>
> I have a pretty nice powerpoint that kinda illustrates the whole picture
> and I guess if you stare at it long enough it starts to make sense. :)
>
>
>
>
>
>
>
>
> On Mon, Aug 24, 2009 at 5:15 PM, Hoogen <hoogen82_at_gmail.com> wrote:
>
>> Hi All,
>> I have been trying to look around but any more information would be
>> great...
>>
>> The only thing I understand it can't be done is because RFC says so.. and
>> because just in case the disconnected area has ASBR type 5 external lsa's
>> cannot pass through.
>>
>> Anyone has any more information other than this?
>>
>> -Hoogen
>>
>>
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Received on Mon Aug 24 2009 - 16:34:17 ART