Controllerless Networks

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Contributor I

Getting time via NTP from a DC with IAP-105

Hello Everybody,

 

I am having some problems about getting the time from a Microsoft Domain Controller. The DC is ping-able and other devices like the switch can receive the right time from the DC. The DC-Admin told me, that everything is ok with the DC (this is something outside my influences).

 

I don't know which information is necessary for you to help me. Here are some basic Information:

 

  * version 6.3.1.0-4.0.0

  * virtual-controller-country PL

  * virtual-controller-ip 172.20.7.195

  * terminal-access

  * ntp-server 172.20.7.237

  * clock timezone Warsaw 01 00

 

Please tell me which further information you need.

 

I hope somebody would have the same problem and knows a little hint or some troubleshooting ideas.

 

Best regards,

 

Marcel Heß

Re: Getting time via NTP from a DC with IAP-105

Hi,

Did u checked the your network allowing NTP connectiviy (not ping...) to the server and from the server to the VC?

UDP/TCP 123?

 

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Re: Getting time via NTP from a DC with IAP-105

Can u please check with external NTP ?
here is a list of external NTP servers:
www.pool.ntp.org/en/
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Contributor I

Re: Getting time via NTP from a DC with IAP-105

Hey kdisc98,

 

thank you for your quick response.

 

I will check these things and will give you feedback.

 

Best regards,

 

Marcel Heß

Contributor I

Re: Getting time via NTP from a DC with IAP-105

Hey,

 

please excuse my late response, I only have limited remote access to the IAPs.

 

With the above hints the time synchronisation do not work.

 

I have checked the things you suggested. With the NTP-Server pool.ntp.org the time sync. works without problems. Between the IAPs and the DC is only a switch located with no restrictions. The DC is configured as standalone NTP-Server. After looking into the DC-Firewall logs, it seems, that the IAPs doesn't ask the DC. I have double checked all IP addresses and subnet masks.

 

I have contacted the Support, they said that there is no problem with the IAP.

 

Now, I have no idea what to check know or where I can get any further help.

 

Some other hints or ideas?

 

Mant thanks in advance!

 

Best regards,

 

Marcel

 

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Edit note: Some refactoring of the posting to make the message clear :smileyhappy: 

Contributor I

Re: Getting time via NTP from a DC with IAP-105

Hallo,

 

I solved the problem. It was a wrong configuration at the domain controller.

 

Here is the article that helped me to solve the problem:

https://social.technet.microsoft.com/wiki/contents/articles/15393.ntp-server-for-non-windows-clients.aspx

 

Best regards,

 

Marcel Heß

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