Re: /25's prefixes announced into global routing table?

[Jakob Heitz <jakob.heitz () ericsson com>]

> Date: Fri, 21 Jun 2013 16:14:07 -0400
> From: "Majdi S. Abbas" <msa () 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.