[dns-operations] Thomas Kühne : IPv6 Connectivity Saga (part n+1)

Edward Lewis Ed.Lewis at neustar.biz
Mon Feb 4 16:24:34 UTC 2008

At 15:09 +0100 2/4/08, Thomas =?utf-8?q?K=C3=BChne?= wrote:

Whenever I see a new health monitoring system I like to do some 
verification of the results.  Regarding:

>only one server: KN

Granted something is wrong, but according to IANA, there are two:

Asking trantor.umd.edu (which used to be a root server) shows that it 
thinks it is authoritative for the zone yet is not in the NS list. 
Further, the serial numbers on trantor and the upr1 are the same, so 
trantor apparently is all-but-in-the-apex-NS working second machine.

$ dig kn ns @trantor.umd.edu +norec

; <<>> DiG 9.3.4-P1 <<>> kn ns @trantor.umd.edu +norec
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21334
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;kn.                            IN      NS

kn.                     86400   IN      NS      UPR1.UPR.CLU.EDU.

;; Query time: 24 msec
;; WHEN: Mon Feb  4 11:16:13 2008
;; MSG SIZE  rcvd: 50

Edward Lewis                                                +1-571-434-5468

Mail archives, backups.  Sometimes I think the true beneficiaries of
standards work are the suppliers of disk drives.

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