[dns-operations] Level 3 A and B DNS resolvers

[Josh Luthman]

I'm well aware these are not to be used by the public for DNS.  My only
concern is that it's used as one of several external hosts to look outside
of our network.  This is monitored through Spectrum (Charter) in southwest
Ohio.  Maybe a closer server was taken offline or it was unplugged for a
coffee maker.  Just reaching out to see if there's any insight at all.

Since ~Dec 8 it looks like we added a bit of latency:
[image: image.png]

DNS resolution has had quite some issues since then:
[image: image.png]


 4    10 ms     9 ms     8 ms  lag-15.troyoh0901h.netops.charter.com
 [65.189.190.189]
  5    17 ms    14 ms    13 ms  lag-39.dytnoh5501r.netops.charter.com
 [65.29.38.112]
  6    10 ms    10 ms    10 ms  lag-28.rcr01clevohek.netops.charter.com
 [65.29.1.46]
  7    15 ms    40 ms    10 ms  lag-2-100.rpr01cleyohdh.netops.charter.com
 [65.29.33.239]
  8     *        *        *     Request timed out.
  9    18 ms    17 ms    17 ms  ae2.3601.ear1.Washington12.level3.net
<http://ae2.3601.ear1.washington12.level3.net/> [4.69.148.45]
 10    18 ms    17 ms    17 ms  a.resolvers.level3.net [4.2.2.1]


Josh Luthman
24/7 Help Desk: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
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