Re: any dangers of filtering every /24 on full internet table to preserve FIB space ?

[Jeff Tantsura <jefftant.ietf () gmail com>]

There has been a number of efforts to implement FIB (actually BGP RIB) compression. There’s a white paper from MS 
research; I recall Spotify talking of running off-box BGP compression SW and re-injecting summarized BGP RIB; Volta 
Networks had an implementation of full BGP table compression to about 370K routes with no connectivity loss and  
reasonably fast reaction of topology changes/disaggregation needed(it even won some Intel price for innovation), not 
sure what happened to it (Volta had been acquired by IBM some time ago). To my memory -  IOS-XR allows off box custom 
best path logic and  re-injection of routes into BGP RIB

Cheers,
Jeff

> On Oct 10, 2022, at 09:26, William Herrin <bill () herrin us> wrote:
>
> On Mon, Oct 10, 2022 at 8:37 AM Mike Hammett <nanog () ics-il net> wrote:
> > Feasibility of adding some middleware that culls unneeded routes (existing more specific and aggregate routes 
> > pointing to the same next hop), when that table starts to fill?
>
> This is called "FIB aggregation." It exists and works but is not widely adopted.
>
> Regards,
> Bill Herrin
>
> -- 
> For hire. https://bill.herrin.us/resume/