NTP Setup Misc Notes
NTP Server to Use: time-a.nist.gov – 129.6.15.28
Other NTP Servers

http://www.cisco.com/en/US/docs/ios/12_1/configfun/configuration/guide/fcd303.html#wp1001151



http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a00807ca437.shtml#configs