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% ...