We are running 14 Linux Centos 5.4 servers, 2 Cisco 3900 routers and 2 Cisco 48 port switches. We need all hardware to have the same time for troubleshooting. 2 of my 14 servers are web servers which i would like to make ntp1 and ntp2 hosting time to the rest of the network. We also have about 150 routers deployed to clients which should also get its time from our time servers remotely (ntp1.mydomain.com & ntp2.mydomain.com).
How do I setup ntp1 and ntp2 to sync with time.nist.gov and all my other servers and routers to sync with ntp1.MyDomain.com and ntp2.MyDomain.com?