Cisco Systems OL-7396-01 Manual De Usuario

The following example displays the NTP status:

Switch# show ntp status

Clock is synchronized, stratum 4, reference is 198.92.30.32

nominal freq is 250.0000 Hz, actual freq is 249.9999 Hz, precision is 2**24

reference time is B6C04F19.41018C62 (18:21:13.253 UTC Thu Feb 27 1997)

clock offset is 7.7674 msec, root delay is 113.39 msec

root dispersion is 386.72 msec, peer dispersion is 1.57 msec

If no other source of time is available, you can manually configure the current time and date after the 
system is restarted. The time will remain accurate until the next system restart. Cisco recommends that 
you use manual configuration only as a last resort. 

If you have an outside source to which the ATM switch router can synchronize, you do not need to 
manually set the system clock. 

To configure, read, and set the ATM switch router as a time source for a network based on its calendar, 
perform the following steps in global configuration mode:

To manually read and set the calendar into the ATM switch router system clock, perform the following 
steps in privileged EXEC mode:

To display the system clock information, use the following EXEC command:

Switch(config)# clock calendar-valid

Sets the ATM switch router as the default clock.

Switch(config)# clock summer-time zone 

recurring [week day month hh:mm week day 
month hh:mm [offset]]

Configures the system to automatically switch to 
summer time (daylight savings time), use one of 
the formats of the clock summer-time 
configuration command. 

Switch(config)# clock timezone zone hours 

[minutes]

Configures the system time zone. 

Switch# clock read-calendar

Reads the calendar.

Switch# clock set hh:mm:ss day month year

Manually sets the system clock.

Switch# clock update-calendar

Sets the calendar.

show clock [detail]

Displays the system clock.