Originally posted by: SystemAdmin

Hi

We have a couple of AIX(5.3) and LINUX(RHEL) servers. But there is time deviation among these servers. How do we achive time synchronization among these machines? NTP may be one of the solution. But our network is no way connected to outside world. Its a closed network. So in this environment how do I acheive time sync in these servers? Is there any solution that works irrespective of OS type and in a local closed environment? Can I use NTP locally(making noe of the servers the time server)?

Please help me.Any kind of advice/suggestion is highky welcome.

With regards
Kuntal M Acharyya

#AIX-Forum

Originally posted by: SystemAdmin

NTP doesn't require access to the external world. You can designate one of your servers as the NTP master and synchronize all the others to its clock. This will give you consistency albeit not absolute accuracy.

HTH

Jim Lane
#AIX-Forum

Originally posted by: SystemAdmin

Hi Jim

Thats great. That means I can use NTP in local network too. A small doubt. What will be the reference time that will be used to sync the other servers? Is it the one in the network designated as master server?

Please advice me.

With regards
Kuntal M acharyya.
#AIX-Forum

Originally posted by: SystemAdmin

> Hi Jim
>
> ... I can use NTP in local network ...
> What will be the reference time ...?
> Is it the one in the network designated as master server?

Yes.

If the motherboard clock (as tuned) is not sufficiently accurate,
you can purchase accurate time peripherals,
such as a gps receiver for time accurate to the millisecond.

If you have an intermittent external connection,
you can use rdate(8) to periodically tune your motherboard clock
against NIST or other time servers.

Hopefully helpful,
#AIX-Forum

Originally posted by: SystemAdmin

Kuntal: if you designate one of your servers as the ntp master then all the others will synchronize their clocks to the local time on that server. You will have time that is consistent but not accurate.

Regards,
Jim Lane
#AIX-Forum