Re: Hey, anyone who wanna help improve the net stability?

[Avi Freedman <freedman () netaxs com>]

Umm, Gordon, read what Paul said.

He was saying that he suspected that the new /24s are in the swamp.
And even Sprint listens to any /24s from there.

The swamp is basically the old "Classful" address space.  
What Sean did was to say "You can use your old 'Class C's
but I have to stop the table-size growth in *new allocations*".

Avi

> Hi Paul,
>
> you comment leaves me confused.  25,000 24s up 20% in the last six months
> means 5,000 NEW prefix 24s in the global routing tables.  Where did they
> come from?  I ask because I had thought that it was just about impossible

They either came from:

1) The swamp, or
2) Sprintlink customers

Sean's answer to 2) would be that other providers should adopt similar
filters.

> to get a 24 routed at the nets defaultless core. And that this
> impossibility has been around for at least the last 6 months.
>
> I thought that if "cooknet" as a new MCI customer has a 24 handed to it by
> mci all nice and cidrized that "cooknet's" 24 would never appear in your
> list being aggregated by mci along with other 24s to make a smaller prefix

True if MCI aggregated properly.  But if you're dual-homed to Sprintlink,
Sprint'd announce it for you - and if you used a 2-year-old "Class C"
obtained for "cooknet" from the NIC, Sprint would hear that and/or 
announce it for you (depending on whether you're a customer, of course).

> that would be announced eventually in the global tables?  Have I
> misunderstood something or is theory diverging from practice.

Avi

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>
> On Thu, 5 Sep 1996, Paul A Vixie wrote:
>
> > > Without pointing fingers, there are some 9K prefixes that could be 
> > > removed by proper aggregation/reconfiguration.
> >
> > There are also 25,000 /24's, up 20% from six months ago.  I don't
> > have any figures on how many are in the "swamp", but I think this
> > is the most fruitful place to try to cap growth or hack it back:
> >
> > Total routes: 39670
> >
> >  8    22   0.1%
> >  9     1   0.0%
> > 10     4   0.0%
> > 11     6   0.0%
> > 12    14   0.0%
> > 13    30   0.1%
> > 14   102   0.3%
> > 15   173   0.4%
> > 16  5687  14.3%
> > 17   246   0.6%
> > 18   493   1.2%
> > 19   921   2.3%
> > 20   954   2.4%
> > 21  1200   3.0%
> > 22  1824   4.6%
> > 23  2425   6.1%
> > 24 25539  64.4%
> > ...

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