To configure a router as a time source for a network based on its calendar, use theclock calendar-valid global configuration command. Use the no form of this command to specify that the calendar is not an authoritative time source.
clock calendar-valid
no clock calendar-valid
This command has no arguments or keywords.
The router is not configured as a time source.
Global configuration
| Release | Modification | 10.0 | This command was introduced. |
|---|
Some platforms have a calendar which is separate from the system clock. This calendar runs continuously, even if the router is powered off or rebooted. If you have no outside time source available on your network, use this command to make the calendar an authoritative time source.
The following example configures a router as the time source for a network based on its calendar:
clock calendar-valid
| Command | Description |
|---|---|
| ntp master | Configures the Cisco IOS software as a Network Time Protocol (NTP) master clock to which peers synchronize themselves when an external NTP source is not available. |
| vines time use-system | Sets VINES network time based on the internal time. |
Printed for apswan@ctr.ap.nic.in on Wed Mar 5 22:32:57 PST 2003
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