| Router# configure terminal | Enters global configuration mode. |
| Router(config)# clock timezone CST -6 | Sets the time zone to Central Standard Time (CST), which is 6 hours behind UTC. |
| Router(config)# clock summer-time CST recurring 2 Sun Mar 2:00 1 Sun Nov 2:00 | Optionally specifies daylight savings time. |
| | NOTE: If the clock summer-time zone recurring command is specified without parameters, the summer time rules default to United States rules. |
| Router(config)# ntp server ip-address | Synchronizes the software clock of the router with the specified Network Time Protocol (NTP) server. |
| Router(config)# ntp master | Enables the router's NTP server. |
| | NOTE: It is recommended to have a single authoritative timer or server that all devices and services in the network query. |