Re: import routes from one NSSA Are in another NSSA Area

I cannot lab this up now ... but this is an interesting question. Hopefully
tomorrow night I can get a chance ... I will not be able to test this till
then though.

Part of me was asking "why?". Then I thought about the need for having a
non-default-route route. The best example I had, was that BGP cannot learn
of it's neighbor through a default router. Ok this makes more sense now ...

Anyone else come up with a good requirement for having a non-default-route?
So with this said ...

Important to note ... you cannot have type 5 LSAs in a nssa. Just not
allowed ... basic rule. So no getting type 5s into this nssa. This is why
we have these type 7 LSAs in a nssa area ... so there is no way to make
this work using the nssa functionality. Type 5s are simply not allowed.

Can you do extra things like use a static, or create a tunnel and introduce
additional networks?

Can you use the area-range command for the loopback and also generate a
summary route for all the other routes? Humm ... I need to test this, but
will not be able to till tomorrow. Also, this is not route summarization
since you would be configuring an exact match for the remote loopback ...
Can you change and inject a type 5 into a nssa with the area-range command?
I do not know (yet) ... I need to test it.

Would love to hear some others thoughts. Thanks Reni for the interesting
question. Have a good night,

Andrew

On Sat, Jun 13, 2009 at 4:48 AM, Rene <rene.klose_at_gmail.com> wrote:

> Hi I know the concept of the nssa area I m just trying to prepare myself
> for the exam with the most complicates things i can come up with or they
> might throw at me
>
> i uploaded the topology
> http://www.flickr.com/photos/33933586@N03/3620998423/sizes/o/
>
> how could i get the Lo0 of R1 over to R4 and other way around if the
> loopbacks need to show up as N1 or N2 routes on the ABR without using a
> default route originated by the abr ?
>
> thanks in advance rene4
>
>
>
>
> On Fri, Jun 12, 2009 at 6:13 PM, Bryan Bartik <bbartik_at_ipexpert.com>wrote:
>
>> I agree with Andrew, explain what are you trying to do then we can help
>> :-)
>> Always up for an OSPF Challenge!
>>
>>
>> On Fri, Jun 12, 2009 at 8:33 AM, ALL From_NJ <all.from.nj_at_gmail.com>wrote:
>>
>>> Hey Reni,
>>>
>>> It is Friday and ... is it 5 oclock yet? ... somewhere it is ... ;-)
>>>
>>> If I understand your question correctly, this goes against what a
>>> stub/nssa
>>> area is / can do. Here is a good link I found for you, I like the way
>>> this
>>> lays out nssa.
>>>
>>>
>>>
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a88.
shtml
>>>
>>> If you need to prefer one path over another, or ensure connectivity ...
>>> there are other ways to configure and provide this. Can you expand some
>>> on
>>> what you are trying to accomplish? The other members on this mailer are
>>> really smart and always up for an OSPF challenge! ;-)
>>>
>>> HTH,
>>>
>>> Andrew Lee Lissitz
>>>
>>>
>>>
>>> On Fri, Jun 12, 2009 at 2:11 AM, Rene <rene.klose_at_gmail.com> wrote:
>>>
>>> > Hi Folks,
>>> >
>>> > I 'm just wondering if it would be some how possible to import
>>> > external (LSA5) routes into an NSSA area? I know that it is not design
>>> > to work that way, to be precise it design to work exactly the other
>>> > way to block these routes, but much of the things you have to do in
>>> > your lab are not design they way you have to implement them.
>>> >
>>> > any thoughts would be appreciated..
>>> >
>>> > i found one cmd in the route my witch some promissing "set level stub"
>>> > but it doesn't do anything.
>>> >
>>> > cheers Reni
>>> >
>>> >
>>> > Blogs and organic groups at http://www.ccie.net
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>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>>
>>>
>>> --
>>> Andrew Lee Lissitz
>>> all.from.nj_at_gmail.com
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
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>>>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Bryan Bartik
>> CCIE #23707 (R&S), CCNP
>> Sr. Support Engineer - IPexpert, Inc.
>> URL: http://www.IPexpert.com
>>
>
>
>
> --
>
>
> Woody Allen <http://www.brainyquote.com/quotes/authors/w/woody_allen.html> -
"Money is better than poverty, if only for financial reasons."

--
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net