.ORG problems this evening

Thu Sep 18 08:45:29 UTC 2003

Todd/Chris,

>>
>> It makes me wonder how UltraDNS got a contract to manage the domain on
>> all of two nameservers hosted on the same subnet, given that they were
>> supposed to have deployed "geographically diverse" (or something like
>> that) servers. But then, we know ICANN smokes the crack liberally at
>> times....
>
> Just because they hosts are on the same subnet and are apparently behind
> the same end device for you doesn't make them non-geographically diverse
> if they are really anycast pods, does it? It really just means one anycast
> pod was down for a time :(

Not even that:

(a) being on the same /24 doesn't make them on the same subnet. We
    have this thing called CIDR nowadays. Hell, being on the
    same /32 doesn't make them on the same (physical) subnet with anycast.

(b) they aren't on the same /24 anyway. Specs needed.
    Compare:

	amb at shed:~$ host tld1.ultradns.net
	tld1.ultradns.net has address 204.74.112.1
                                                ^===*****
	amb at shed:~$ host tld2.ultradns.net
	tld2.ultradns.net has address 204.74.113.1
                                                ^===*****

    A quick inspection from your favourite looking glass will show that
    there is a /23 and a /24 separately announced. Hence:

(c) at least from here, the routes are pretty diverse in any case
    (see below). IE not only is (say) a west coast host served by different
    servers than a European host, but the two European hosts are served by
    different servers.

Alex

amb at shed:~$ traceroute tld1.ultradns.net
traceroute to tld1.ultradns.net (204.74.112.1), 30 hops max, 38 byte packets
 1  195.82.114.1 (195.82.114.1)  0.917 ms  4.344 ms  6.131 ms
 2  bdr1.lon-th1.mailbox.net.uk (195.82.97.226)  10.080 ms  4.050 ms  1.694 
ms
 3  195.82.96.70 (195.82.96.70)  1.552 ms  1.553 ms  2.138 ms
 4  ge-1-3-0.r01.londen03.uk.bb.verio.net (217.79.161.10)  1.694 ms  11.200 
ms  4.134 ms
 5  ge-1-2.a01.londen03.uk.ra.verio.net (213.130.47.83)  150.565 ms 
148.296 ms  199.156 ms
 6  UltraDNS-0.a01.londen03.uk.ra.verio.net (213.130.48.38)  14.549 ms 
8.962 ms  22.128 ms
 7  dellfwabld.ultradns.net (204.74.106.2)  21.371 ms !H  27.196 ms !H 
31.775 ms !H
amb at shed:~$ traceroute tld2.ultradns.net
traceroute to tld2.ultradns.net (204.74.113.1), 30 hops max, 38 byte packets
 1  195.82.114.1 (195.82.114.1)  1.611 ms  3.728 ms  3.501 ms
 2  bdr1.lon-th1.mailbox.net.uk (195.82.97.226)  8.889 ms  1.704 ms  3.333 
ms
 3  if-4-1-0.bb2.London.Teleglobe.net (195.219.2.1)  57.452 ms  140.352 ms 
208.421 ms
 4  if-6-0.core1.London.Teleglobe.net (195.219.96.82)  2.463 ms  7.007 ms 
7.525 ms
 5  if-1-0.core2.NewYork.Teleglobe.net (207.45.220.37)  82.125 ms  73.374 
ms  92.908 ms
 6  if-4-0.bb8.NewYork.Teleglobe.net (66.110.8.130)  76.796 ms  73.816 ms 
77.613 ms
 7  p3-3.IR1.NYC-NY.us.xo.net (206.111.13.13)  93.642 ms  83.092 ms 
102.477 ms
 8  p5-1-0-2.RAR2.NYC-NY.us.xo.net (65.106.3.65)  72.338 ms  72.658 ms 
71.785 ms
 9  p6-0-0.RAR1.Washington-DC.us.xo.net (65.106.0.2)  117.226 ms  76.936 ms 
78.430 ms
10  p6-1-0.MAR1.Washington-DC.us.xo.net (65.106.3.182)  77.206 ms  84.026 
ms  77.201 ms
11  p0-0.CHR1.Washington-DC.us.xo.net (207.88.87.10)  85.094 ms  77.777 ms 
77.614 ms
12  64.124.112.141.ultradns.com (64.124.112.141)  85.226 ms  77.912 ms 
78.143 ms
13  dellfwpxvn.ultradns.net (204.74.104.2)  77.940 ms !H  78.441 ms !H 
97.738 ms !H