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

Brie bruns at
Mon Oct 10 19:06:13 UTC 2022

On 10/10/22 9:20 AM, Stephane Bortzmeyer wrote:
>> But theoretically every filtered /24 could be routed via smaller
>> prefix /23 /22 /21 or etc.
> I don't think this is true, even in theory, specially for legacy
> prefixes. There is probably somewhere a Geoff Huston survey on /24
> without a covering route.

There's lots of legacy blocks out there that are only /24 in size...

Like my primary IPv4 block, for example.

I believe you'll also find them referred to as 'portable' blocks.

Brielle Bruns
The Summit Open Source Development Group    /

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