Hey, anyone who wanna help improve the net stability?
Avi Freedman
freedman at netaxs.com
Thu Sep 5 18:46:02 UTC 1996
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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