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How do I configure NTP on My Cisco Router?  How do I find a reliable NTP Server?

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Last Modified: 2012-05-06
Currently I have no NTP server specified on my Cisco Router.  I have the timezone and daylight savings time configured but no NTP server.  Should I have an NTP server?  If so, how do I go about choosing one?  Would I configure this on all my cisco devices or just my router connecting to my ISP?  Thanks
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Top Expert 2009

Commented:
Yes, you should use NTP as it makes log timestamps usable.

Here are two I commonly use:

Washington, DC: U.S. Naval Observatory
192.5.41.41: tock.usno.navy.mil
192.5.41.40: tick.usno.navy.mil

You typically want to choose a time server that is close geographically and is reliable.

Set the router to use stratum 1 Internet time servers (like above) and then you can point your other devices to the router for their time.

Author

Commented:
Thanks.  So once I configure NTP on my Router, I just point my other devices (ASA's, VPN Concentrators, Switches, etc) to that router that I configured NTP on?  Will not using NTP slow down a network?
Top Expert 2009
Commented:
This one is on us!
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