Re: IPv4 smaller than /24 leasing?

[Justin Wilson <lists () mtin net>]

Yes, we do this for several clients.  We route them a smaller than 24 block over a tunnel.

Which bring up an interesting question.  Will there be a time where the smallest block size recognized will be 
something smaller than a /24? /25, /26 ? Most modern routers have the horsepower to deal with larger route tables. 

I know of dozens, if not hundreds of small ISPs that can’t participate in BGP because they don’t have big enough 
blocks.  Many others who do are not utilizing their /24 so it just kinda sits there. They have to have their provider 
assigned IP space be advertised. Does not help them getting on to an IX though.

I know I know IPV6 is the answer not going to accepting smaller blocks. 


Justin Wilson
j2sw () mtin net

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


> On Jan 4, 2018, at 5:31 PM, Michael Hallgren <mh () xalto net> wrote:
>
> Thanks Bill. Kinda ugly, but OK I see... Prefer v6 ;-)
> mh
>
> Le 4 janv. 2018 à 23:17, à 23:17, William Herrin <bill () herrin us> a écrit:
> > On Thu, Jan 4, 2018 at 5:07 PM, Michael Hallgren <mh () xalto net> wrote:
> >
> > > Am I missing something? What's the trigger for doing tunneling here?
> >
> > With "IP address leasing" you aren't connected to the network which
> > holds
> > the address registration.
> >
> > For leasing less than a /24, they need a plan other than "advertise to
> > your
> > peers with BGP" because even if your peer accepts a /27, most of their
> > peers will not.
> >
> > Regards,
> > Bill Herrin
> >
> >
> >
> > --
> > William Herrin ................ herrin () dirtside com  bill () herrin us
> > Dirtside Systems ......... Web: <http://www.dirtside.com/>