NTP protocol not working correctly 1

[ScottWIT]

I have setup NTP on our Cisco 2801 but for some reason the time on our PCs here is still not correct (it's about 5 minutes fast). Here's what I have in the 2801 config for NTP:

scheduler allocate 20000 1000
ntp clock-period 17178933
ntp update-calendar
ntp server XX.XXX.XXX.X

Am I missing something? Is there something on my network that could be interfering?

 

[ADB100]

I assume you are pointing your PC's to the 2801 as their NTP server? Or you have a Domain set up and you are pointing your PDC emulator at the 2801?

 

[silverhairb]

Might want to check your firewall to see if it will pass ntp traffic.

[the other] Bill

 

[burtsbees]

That just configures the router to get the time FROM a server...this does not hand out NTP time to pc's...

Burt

 

[ScottWIT]

Burt-- I suspected that. What is the best way to go about getting the NTP info to my PC's? Do I set that up on my PDC?

 

[ADB100]

You need to point your PDC emulator to the router. From a command prompt type the following:

net time /setsntp:10.1.1.1

or whatever the IP address of the 2801 is. If its a domain then the clients should automatically sync with a domain controller.

Andy

 

[burtsbees]

Andy---not to piggyback, but someone needs your assistance here

http://www.tek-tips.com/viewthread.cfm?qid=1529581&page=1

I am only telling you because I would like to know how to schedule jobs in the DOS command prompt in Windows---I'm pretty sure you're the one who posted that in a thread a while back, and I had it written down somewhere...thanks!

Burt

 

[ScottWIT]

Andy--

I tried your suggestion but no luck (the command did complete successfully though). Yes, the clients all login to a domain. I must have something incorrect or missing in my 2801 config...?

Scott

 

[Viconsul]

ScottWIT,

Are your pcs running Microsoft Windows? If so, check your firewall settings to make UDP port 123 is allowed.

-HTH

Viconsul

 

[ScottWIT]

Well, I discovered that if I manually point the DNS on my laptop to our DNS servers my clock is then correct. So what does this mean? I do have our DNS pointing to them in the config for the 2801. But then again, the clocks on the DNS servers themselves are incorrect.

 

[ScottWIT]

The issue is now fixed after I rebooted my PDC. I didn't think a reboot was necessary but it obviously was.