/25's prefixes announced into global routing table?

Fri Jun 21 22:27:44 UTC 2013

> Date: Fri, 21 Jun 2013 16:14:07 -0400
> From: "Majdi S. Abbas" <msa at latt.net>
> 
> On Fri, Jun 21, 2013 at 01:56:02PM -0600, Michael McConnell wrote:
>> As the IPv4 space get smaller and smaller, does anyone think we'll
>> see a time when /25's will be accepted for global BGP prefix
>> announcement. The current smallest size is a /24 and generally ok
>> for most people, but the crunch gets tighter, routers continue to
>> have more and more ram will it always be /24 the smallest size?
> 
> 	RAM != FIB.
> 
> 	The forwarding hardware is generally going to be the limit, and
> that's going to be painful enough as we approach a half million
> prefixes. 
> 
> 	You couldn't even consider such a thing until after that pain
> point.
> 
> 	--msa

There are techniques to fix that. For example, Simple Virtual Aggregation
http://tools.ietf.org/html/rfc6769

-- 
Jakob Heitz.