I have configured a Cisco 6509 core switch as a NTP master and allowed all my access switches to get their time synchronised with the core switch. Now, I want to configure the core switch to get itself synchronised with other public NTP server which would be reliable and genuine as our organisation is serving for healthcare. One of my friend has told me to use these IPs 126.96.36.199 or 188.8.131.52 as a NTP Server in the core switch. Should I use them?
Is Cisco recommends any Public IP for NTP Server synchronisation? Please suggest.
Thanks & Regards,