Re: IPv4 Mismanagement

[Wayne Bouchard <web () typo org>]

Groups that have such things I can only presume do not do a good job
of periodically going through and auditing their IP allocations or, if
they do, then they don't do a good enough job of cleaning up all the
details.

On Fri, Oct 02, 2020 at 05:44:13PM -0400, Justin Streiner wrote:
> I suspect many providers don't have good business processes for reclaiming
> IP space that was assigned to customers who have either disconnected or
> voluntarily returned the space.
>
> The provider I started out with in the mid/late 90s bootstrapped itself
> with IP space from MCI (now, CenturyLink... I think?) and UUNET (now
> Verizon Business), but we handed those blocks back when we started getting
> provider-independent space from ARIN.  No idea what became of that space
> after we stopped announcing it.
>
> jms
>
> On Fri, Oct 2, 2020 at 3:38 PM Ryan Wilkins <ryan () deadfrog net> wrote:
>
> > I have the same thing with a service that was disconnected a couple years
> > ago.  Four IP blocks of /24 size are still swipped to us and we???re
> > announcing them.  I don???t put any customers on them and just use them for
> > temporary things for fear that some day someone will want them back.
> >
> > On Oct 2, 2020, at 2:50 PM, Matt Brennan <brennanma () gmail com> wrote:
> >
> >
> > A service I disconnected more than 2 years ago still has a /24 of their
> > space SWIPED to me. Their NOC closed the ticket I opened to remove. Unknown
> > if it's actually in use for another customer.
> >
> > I also had a conversation last week with another ISP (we were
> > renegotiating our contract) about this. The order form they sent me had
> > multiple /28's we had "given back" years ago still listed. Turns out
> > they're still being routed to us as well.
> >
> > I would bet it happens all over the place.
> >
> > -Matt
> >
> > On Fri, Oct 2, 2020 at 2:00 PM Matt Hoppes <
> > mattlists () rivervalleyinternet net> wrote:
> >
> > > I'm sitting here in the office on a Friday performing some IP
> > > maintenance and I see that one of our upstreams is still filtering an IP
> > > range we haven't used in years.   I dig into it a bit more and it turns
> > > out a major carrier still has them SWIPed to us.
> > >
> > > This got me curious and I dug more into IPs from back in our early days
> > > and discovered there are two Tier-1 carriers we no longer do business
> > > with that still have large blocks of their own IPs SWIPED and allocated
> > > to us.
> > >
> > > This is really confusing and concerning.   I know it's not the
> > > end-all-be-all, but I wonder how much IPv4 exhaustion is being caused by
> > > this type of IPv4 mis-management, where IPs are still shown as
> > > "allocated" to a customer who hasn't used them in years.
> > >
> > > I've seen this behavior from Frontier and CenturyLink to name just a few.
> > >
> > > Any thoughts on this?

---
Wayne Bouchard
web () typo org
Network Dude
http://www.typo.org/~web/