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Re: Level 3 BGP Advertisements
From: Andy Davidson <andy () nosignal org>
Date: Wed, 29 Aug 2012 20:39:18 +0100

On 29 Aug 2012, at 20:28, Nick Olsen <nick () flhsi com> wrote:

In practice, We've always advertised our space all the way down to /24's 
but also the aggregate block (the /20 or the /21). Just so there was still 
reachability to our network in the event that someone made the foolish 
mistake of filtering lets say prefixes smaller /23...

Filtering your de-aggregated prefixes in the presence of covering aggregates in this case would certainly not be 
foolish. :-)

Please, unless you really know why you need to do otherwise, just originate your aggregates.

Your friends,
Every other Autonomous System

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