ntp servers

Gary Johnson garyjohn at spocom.com
Mon Oct 7 19:07:58 UTC 2013

On 2013-10-07, Steven Carr wrote:

> On 7 October 2013 01:01, Julie Xu <xll40 at hotmail.com> wrote:

> > what is default for option ntp-servers? option 4 ? 42 ? or both?

> NTP is option 42, option 4 is for the older time protocol.
> But the DHCP clients need to be configured to request/use that option.
> This is usually the case on Linux, but on Windows if the client is a
> member of Active Directory it will use the Domain Controller for time
> sync. Supposedly if a Windows machine is not a member of AD it will
> use option 42, but I've never seen that work. From what I've seen on
> OS X setting NTP via DHCP isn't supported.

I believe NTP is 56.  42 is the TZDB Timezone option, and 41 is the
POSIX Timezone option.


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