what does dig +trace do?

Tom Schmitt TomSchmitt at gmx.de
Wed Aug 31 15:36:46 UTC 2011

> >> What strikes me as odd is that the first query does return 4 (internal)
> >> root servers, but no glue records ?
> >
> >I have no idea why this is this way.
> Because +trace only displays the answer section of the responses by
> default.
> Try "dig +trace +additional".

Hi Chris,

you are right, thank you. With this I see the glue records:

; <<>> DiG 9.8.0-P4 <<>> +trace example.com
;; global options: +cmd
.                       10800   IN      NS      root1.
.                       10800   IN      NS      root2.
.                       10800   IN      NS      root3.
.                       10800   IN      NS      root4.
root1.     10800 IN A
root2.     10800 IN A  
root3.     10800 IN A
root4.     10800 IN A
;; Received 159 bytes from in 1 ms

;; connection timed out; no servers could be reached

The main problem is still the same though. The trace option fails with a timeout. Even thought I'm operating on the shell of one of the root-servers itself (so there is not much network in between to cause trouble).

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