NTP

[adamgibs7]

Hello Experts,

i need to sychronize Network Cisco devices with NTP server i.e Active Directory which is receiving time from the  Internet.Is it any different approach to configure cisco switches when the time source is from active directory??????

In my previous projects i have configured 6500 as a NTP master and all cisco access switches were pulling time from the core,In the above scenario is it i have do any thing different?????

Thanks

[Richard Burts]

Adam

The Windows implementation of time service uses a simplified version of the Network Time Protocol and is not a full implementation of NTP. So it is problematic to configure your Cisco devices with ntp server pointing to Active Directory. You may be able to configure your Cisco devices to use SNTP to learn time from Active Directory and this might be good enough.

HTH

Rick

[Reza Sharifi]

Hi Adam,

Just point your devices to the IP address of the Active Directory server that is the providing time.

Here the command reference with examples:

http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_10.html#wp1111399

HTH

Reza

[Ganesh Hariharan]

Hello Experts,
i
need to sychronize Network Cisco devices with NTP server i.e Active
Directory which is receiving time from the  Internet.Is it any
different approach to configure cisco switches when the time source is
from active directory??????
In
my previous projects i have configured 6500 as a NTP master and all
cisco access switches were pulling time from the core,In the above
scenario is it i have do any thing different?????
Thanks

Hi,

For your query how cisco switch will synchronize from AD ntp server just configure the following commands in cisco switches and make sure the ntp port 123 is opened  between NTP server and NTP clients.

Router# configure terminal
Router(config)# ntp server

Verify the association with the server using the show ntp status and show ntp associations commands. Listing A offers an example of the output of these commands.

* NTP is a slow protocol, and the formation of NTP associations can take a long time. So, don't expect anything to happen fast. You can keep an eye on it using the debug ntp set of commands. once every thing is ok then turn off the debug command.

Hope to help

If helpful do rate

Ganesh.H