Level 3 BGP Advertisements

Wed Aug 29 19:39:18 UTC 2012

On 29 Aug 2012, at 20:28, Nick Olsen <nick at 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