nanog mailing list archives
Re: IPv4 smaller than /24 leasing?
From: William Herrin <bill () herrin us>
Date: Tue, 13 Mar 2018 13:37:27 -0400
On Tue, Mar 13, 2018 at 1:19 PM, Justin Wilson <lists () mtin net> wrote:
I agree that the global routing table is pretty bloated as is. But what kind of a solution for providers who need to participate in BGP but only need a /25?
Hi Justin, If you need a /25 and BGP for multihoming or anycasting, get a /24. The cost you impose on the system by using BGP *at all* is much higher than the cost you impose on the system by consuming less than 250 "unneeded" Ip addresses. I did a cost analysis on a BGP announcement a decade or so ago. The exact numbers have changed but the bottom line hasn't: it's ridiculously consumptive. Regards, Bill Herrin -- William Herrin ................ herrin () dirtside com bill () herrin us Dirtside Systems ......... Web: <http://www.dirtside.com/>
Current thread:
- Re: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- RE: IPv4 smaller than /24 leasing? Naslund, Steve (Mar 13)
- RE: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? William Herrin (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? Bob Evans (Mar 13)
- Re: IPv4 smaller than /24 leasing? Justin Wilson (Mar 13)
- Re: IPv4 smaller than /24 leasing? Martin List-Petersen (Mar 13)
- Re: IPv4 smaller than /24 leasing? Mike Hammett (Mar 18)
- Re: IPv4 smaller than /24 leasing? William Herrin (Mar 13)
- RE: IPv4 smaller than /24 leasing? Naslund, Steve (Mar 13)
- Re: IPv4 smaller than /24 leasing? Mike Hammett (Mar 18)
- Re: IPv4 smaller than /24 leasing? William Herrin (Mar 18)
- RE: IPv4 smaller than /24 leasing? Naslund, Steve (Mar 13)
- Re: IPv4 smaller than /24 leasing? Lee Howard (Mar 13)