From: David Hurtado (dei2viccie@hotmail.com)
Date: Tue Mar 30 2004 - 16:29:10 GMT-3
Thank you very much for the comprehensive explanation. Cisco should hire you
to write the documents. Everything would be easier.
Thank you again Super Packet Man
>From: "Packet Man" <ccie2b@hotmail.com>
>To: dei2viccie@hotmail.com, ccielab@groupstudy.com
>Subject: RE: BGP new feature
>Date: Tue, 30 Mar 2004 13:49:44 -0500
>
>Hey David,
>
>Actually, this is one of the easier BGP features to understand. A simple
>example will make this clear.
>
>Assume you have 2 bgp routers, r1 and r2, that are ebgp peering.
>
>R1 has a filter configured on it that drops a bunch of routes which R2 is
>sending it. In other words, R2 uses up bandwidth sending routes to R1 it
>doesn't want.
>
>Now, suppose there were a way for R1 to tell R2 not to send those routes in
>the first place because once R1 gets them, it's going to drop them anyway.
>That would be pretty cool, don't you think?
>
>Well, that's exactly what the ORF feature does. Now, for this to work,
>both routers must be of a certain IOS release - which release, I don't know
>- details like this I can never remember. However, assuming both routers
>are of a high enough release, when the BGP peering relationship is setup,
>one part includes a capabilities exchange. And, I believe that during this
>cap's exchange, R1 would tell R2 about the filter it (R2) should use when
>sending R1 routes.
>
>Now, R2 won't waste bandwidth sending R1 rotes it doesn't want.
>
>OK, so now you probably want to know how to configure this feature.
>Off-hand, I can't tell you - again, I have a hard time remembering stuff
>like that. However, if you look in the config guide for 12.3 under IP
>configuration, you'll find a link to new features.
>
>check out
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftbgporf.htm
>
>HTH, pm
>
>
>>From: "David Hurtado" <dei2viccie@hotmail.com>
>>Reply-To: "David Hurtado" <dei2viccie@hotmail.com>
>>To: ccielab@groupstudy.com
>>Subject: BGP new feature
>>Date: Tue, 30 Mar 2004 19:32:57 +0200
>>
>>Hello everybody,
>>
>>I'm trying to understand the BGP new feature: BGP Prefix-Based Outbound
>>Route Filtering, but the Doc Cd is not clear.
>>
>>Could somebody tell me some link or archive where this feature is better
>>explained?
>>
>>Thanks for the help
>>
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