nanog mailing list archives
Re: "Tactical" /24 announcements
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Tue, 10 Aug 2021 18:29:06 +0900
Sabri Berisha wrote:
Just for fun, I did the math. A total of 16,777,216 /24s fit in 32 bits. Take away all the reserved space as per IANA (this is 1,266,696 /24s, see below),
> 240.0.0.0/4 1048576 I think we should also take away multicast addresses of > 224.0.0.0/4 1048576 because multicast route can not be aggregated and must be treated as /32. Anyway,
The largest FIB table I have seen (hi Jim!) was 3,563,546 routes in hardware. This was in a lab environment, of course.
for /24, these days, having 16M entry SRAM (simple one, not TCAM) is trivially easy. Masataka Ohta
Current thread:
- "Tactical" /24 announcements Billy Croan (Aug 09)
- Re: "Tactical" /24 announcements Martijn Schmidt via NANOG (Aug 09)
- Re: "Tactical" /24 announcements Saku Ytti (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Sabri Berisha (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 10)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 09)
- Re: "Tactical" /24 announcements Amir Herzberg (Aug 09)
- Re: "Tactical" /24 announcements Martijn Schmidt via NANOG (Aug 09)
- Re: "Tactical" /24 announcements Adam Thompson (Aug 09)
- Re: "Tactical" /24 announcements Hank Nussbacher (Aug 09)
- Re: "Tactical" /24 announcements Tom Beecher (Aug 09)
- Re: "Tactical" /24 announcements Rabbi Rob Thomas (Aug 09)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 10)
- Re: "Tactical" /24 announcements Tom Hill (Aug 11)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 11)
- Re: "Tactical" /24 announcements Tom Beecher (Aug 09)