Hi Tkatsiaounis,

Meinberg NTP 4.X is the software I am using.

Its documentation is not very understandable to me.

I can't make it work correctly with authentication.

I set up in my "Cisco router" with the command "ntp authenticate". The "NTP server" continues to operate but by entering the command: "show ntp asso detail" don't shows me the message "authenticated".

Do you have a sample configuration? Could you guide me in my setup, please?

Hi Leo,

The "Windows Server" uses the "SNTP / NTP" and does not work with Cisco IOS NTP.

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080a23d02.shtml

Regards.

Ok then.  It's either you let the routers go out to the net for an authoritative NTP source or you can purchase a "true" NTP server.

When I mean a "true" NTP server, it's not the kind which has to go out to the internet and to get an authoritative source.  I mean the ones with built-in GPS receivers. 

I think it's very difficult to add a GPS for NTP on our infrastructure.

Although I think would be good.

I need an example of configuration of meinberg NTP.

Edgar

You don't need to install the NTP server inside the DC.  Find a cabinet that's closest to the ceiling and it'll do fine.  The servers normally come with a magnetic antenna.

Hi Leo,

We didn't planning an acquisition of a GPS for NTP.

Just for that I'm looking for the solution through the Meinberg NTP.

It is not necessary for our infrastructure a NTP server so specialized.

Only one that allows us to maintain uniform time in the network of PCs and routers, that provides NTP authentication.

Edgar