1. Connect to the PUBLISHER web interface
2. OS Administration --> Settings à NTP Servers --> Add new
a. IP address: <ntp IP>
b. SAVE
c. Refresh page and wait to see NTP accessible
d. Connect on CUCM CLI (ssh) and type: utils ntp status (see synchronised to NTP server..)
PS: Subscriber will always use the CUCM Publisher as ntp server.
2. OS Administration --> Settings à NTP Servers --> Add new
a. IP address: <ntp IP>
b. SAVE
c. Refresh page and wait to see NTP accessible
d. Connect on CUCM CLI (ssh) and type: utils ntp status (see synchronised to NTP server..)
PS: Subscriber will always use the CUCM Publisher as ntp server.