Re: OSPF IA advertisements

From: Marko Milivojevic <markom_at_ipexpert.com>
Date: Tue, 2 Jul 2013 13:26:25 -0700

I think he explicitly asked about the inter-area routes, so I wasn't even
thinking about the externals. I don't think you can set the tags on
internal or inter-area.

--
Marko Milivojevic - CCIE #18427 (SP R&S)
Senior CCIE Instructor / Managing Partner - IPexpert
On Tue, Jul 2, 2013 at 12:02 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>wrote:
> Redistributing and setting external tags, I guess.
> I did not think about the details, as I was more concerned with showing
> that the requested functionality was impossible without going outside the
> box, so to say...
>
> -Carlos
>
> Marko Milivojevic @ 02/07/2013 15:19 -0300 dixit:
>
>>
>> He could do it with prefix-lists, but that's not very scalable.
>>
>> How would you tag inter-area routes though?
>>
>> --
>> Marko Milivojevic - CCIE #18427 (SP R&S)
>> Senior CCIE Instructor / Managing Partner - IPexpert
>>
>>
>> On Tue, Jul 2, 2013 at 11:14 AM, Carlos G Mendioroz <tron_at_huapi.ba.ar
>> <mailto:tron_at_huapi.ba.ar>> wrote:
>>
>>     Eduardo,
>>     once the LSAs are in area 0, there is no memory of them coming from
>>     area (say) 10. So if I understand your request correctly, there is
>>     no "native" ospf way of doing this.
>>
>>     On the other hand, you could tag your routes with the area it came
>>     from at the ABRs, and filter based on those tags (also on ABRs).
>>
>>     -Carlos
>>
>>     Eduardo Vazquez @ 02/07/2013 06:57 -0300 dixit:
>>
>>         Hello,
>>
>>         Was wondering if anyone could suggest ways to stop
>>         advertisements out of
>>         area 0 from a non area 0 from going to in to another non area 0
>>         existing,
>>         or future.
>>
>>         In other words:
>>
>>         A50-----A0----A1
>>                           \----A2
>>
>>         If area 50 advertises say O 10.1.50.0/24 <http://10.1.50.0/24>.
>>
>>         Can people suggest a way to stop
>>         the route from flooding to a1 a2 and any future areas?
>>
>>         Thanks,
>>
>>         Ed
>>
>>         Hopefully the diagram came out. Doing this on an iPhone.
>>
>>
>>         Blogs and organic groups at http://www.ccie.net
>>
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>>
>>
>>
>>
>>
>>
>>
>>     --
>>     Carlos G Mendioroz  <tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>>
>>
>>       LW7 EQI  Argentina
>>
>>
>>
>>     Blogs and organic groups at http://www.ccie.net
>>
>>     ______________________________**______________________________**
>> _______________
>>
>>     Subscription information may be found at:
>>     http://www.groupstudy.com/__**list/CCIELab.html<http://www.groupstudy.com/__list/CCIELab.html>
>>     <http://www.groupstudy.com/**list/CCIELab.html<http://www.groupstudy.com/list/CCIELab.html>
>> >
>>
>>
>>
>>
>>
>>
>>
>>
>>
> --
> Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net
Received on Tue Jul 02 2013 - 13:26:25 ART

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