On Thu, Dec 06, 2007 at 07:22:05PM +0100, Kurt Roeckx wrote: > On Thu, Dec 06, 2007 at 10:22:51PM +1000, Anthony Towns wrote:
> > Well, okay... but shouldn't it still be happening if that's the case? > > Unless we've somehow lost a significant number of 10.0.0.0/8 hosts that > > were pointing at ftp/http.us.d.o at that point and now aren't, ike is > > still the host that they should be all hitting so demonstrating the > > load imbalance caused by 10.0.0.0 hosts should be trivial if we have > > any access to ike's logs. > Afaik, there is a whole bunch of cable users in the 24.0.0.0/8 range in > the US. Correct. Here's a useful reference on both the geographical distribution of IPv4 address allocations, and the density of their assignments (based on reachability tests): http://www.isi.edu/ant/address/ One thing worth noting that hasn't been mentioned before now is that all of 224.0.0.0/3 is reserved for multicast, so will never be used as source addresses for DNS sorting -- that means the maximum possible number of public client addresses in 192.0.0.0/2 is roughly half that in each of the other three quarters of the address space. I don't know how this compares in practice to the inflation of NATed clients in the 192.168.0.0/16 range, and we probably can't answer that question without significant empirical study. Curiously, I have a machine running etch behind a firewall, with a NATed 192.168.x.x address; and when I run a getaddrinfo test for http.us.debian.org, I get the following (persistent) ordering: 64.50.236.52 64.50.238.52 128.30.2.36 204.152.191.39 35.9.37.225 That looks like a bug in the getaddrinfo() implementation of rule 9 in etch glibc, above and beyond the concerns over whether it should be implemented? -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ [EMAIL PROTECTED] [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
