[c-nsp] IGP & iBGP Configuration Problem in Transit AS

[Whisper]

Using MPLS to scale your Internet backbone
http://searchtelecom.techtarget.com/tip/0,289483,sid103_gci1299055,00.htmlThis
might be helpful as well


On Mon, Jun 16, 2008 at 7:49 PM, a. rahman isnaini r.sutan <
risnaini at indo.net.id> wrote:

> MPLS
>
>
> a. rahman isnaini r.sutan
>
>
> Vira W wrote:
>
>> Hi Cisco gurus,
>>
>>
>> I have a network topology in this URL :
>> http://www.4freeimagehost.com/show.php?i=3f0ac19164c9.png
>>
>>  My first problem is in IGP configuration inside AS 100. I'm using OSPF. I
>> still confused how to make non-BGP router (C,E,B,D) understand how route
>> the
>> packet transitting this AS. I have tried default route advertisement via
>> OSPF, but since AS 100 is multihomed, there still any chance looping is
>> happened there. How to configure it properly, without redistributing BGP
>> route into OSPF.
>>
>> Second, I understand that iBGP inside AS 100 needs to be configured in
>> mesh
>> topology. Otherwise, use route reflector or confederation. But, if I use
>> route reflector, I'm confused because the each route reflector itself must
>> be meshed, in the other side, from the physical topology (as in the
>> picture), there is none router that is connected mesh. So, which router
>> should I choose as RR. Then, if I choose BGP confederation, still inside
>> sub-AS the router must be connected in mesh topology, which impossible
>> from
>> the topology.
>>
>> So guys, what is your suggestion for my problem in IGP and iBGP
>> configuration inside AS 100?
>> I've read many books about BGP, particularly about transit AS, but their
>> examples is always simple networks. I have found none complex case study
>> network similar my topology.
>>
>> Thanks a lot. Every your comment, suggestion, criticism, will be very much
>> appreciated.
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>>
>>
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