nanog mailing list archives

Re: IPv4 smaller than /24 leasing?


From: Justin Wilson <lists () mtin net>
Date: Tue, 13 Mar 2018 13:47:16 -0400

I am looking at it from an ARIN justification point.  If you are a small operator and need a /24 you have justification 
if you give customer’s publics, but is it a great line if you are only giving out publics for people who need cameras 
or need to connect in from the outside world. If I need a /24 and I don’t really use it all am I being shady?  It 
becomes a “how much of a grey area is there” kind of thing.


Justin Wilson
j2sw () mtin net

www.mtin.net
www.midwest-ix.com

On Mar 13, 2018, at 1:37 PM, William Herrin <bill () herrin us> wrote:

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/>



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