From: Sachin Bhatia (sachin.bhatia21@gmail.com)
Date: Tue Oct 23 2007 - 10:24:01 ART
Hi Shiran..u missed the Introduction which says:
This document defines the various criteria to be used when designing an
Autonomous System Border Routers (ASBR) that will run BGP
[RFC1267 <http://rfc.sunsite.dk/rfc/rfc1267.html>] with other ASBRs external
to the AS, and OSPF [RFC1247 <http://rfc.sunsite.dk/rfc/rfc1247.html>] as
its IGP.
Now RFC1267 is BGP version 3 and the significant difference between
BGP-1,BGP-2,BGP-3 and BGP-4 (RFC-1771) is that BGP-4 is *Classless* while
the earlier 3 versions were classful...Hope this clears ur confusion.
regards..
On 10/23/07, shiran guez <shiranp3@gmail.com> wrote:
>
> it say that:
>
> 2. Route Exchange
>
> This section discusses the constraints that must be met to exchange
> routes between an external BGP session with a peer from another AS
> and internal OSPF routes.
>
> BGP does not carry subnet information in routing updates. Therefore,
> when referring to a subnetted network in the OSPF routing domain, we
> consider the equivalent network route in the context of BGP.
> Multiple subnet routes for a subnetted network in OSPF are collapsed
> into one network route when exported into BGP.
>
> When we advertise with the network statement a network dosnt the BGP pass
> the subnet information, I think it dose?!
>
> May be I am tiered and missing something here, please advice?
>
>
>
> --
>
>
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
>
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