How does NT choose a DC?

Richard Sharpe sharpe at
Wed May 10 15:02:02 GMT 2000

At 06:54 AM 5/11/00 +1000, Paul J Collins wrote:
>>>>>> "Luke" == Luke Kenneth Casson Leighton <lkcl at> writes:
>    Luke> now, is anyone curious as to _why_ it sometimes takes 30
>    Luke> seconds to time-out if your DC can't be found?
>There is a good doc on the NT DC location process here and how to hack
>it here: 
>There seems to be a form of DC location called H-node that will
>broadcast if WINS fails to give it some DCs.  The 30 secs is probably
>the default timeout.  I saw a situation like this today on a machine
>that had a bogus WINS address for our primary domain.

Hmmm, seems to be some confusion re NBNS, which can be B-node, P-node,
H-node and M-node, and DC location, which, IMHO, uses NBNS.

>Then there is M-node, which broadcasts first but does not wait for the
>full timeout.  In all there are about 5 different location mechanisms
>mentioned in that article.
>Paul Collins <sneakums at> - - - - - [ A&P,a&f ]

Richard Sharpe, sharpe at
Samba (Team member,, Ethereal (Team member,
Co-author, SAMS Teach Yourself Samba in 24 Hours
Author: First Australian 5-day, intensive, hands-on Linux SysAdmin course
Author: First Australian 2-day, intensive, hands-on Samba course

More information about the samba-ntdom mailing list