Cisco IOS clock settings

set correct time zone:

clock timezone PCTime -8

 

set summer time old ios:

clock summer-time PCTime date Mar 13 2011 2:00 Nov 6 2011 2:00

 

New IOS have other nice settings, it's need setup just one time:

clock summer-time CDT recurring

 

set ntp server:

ntp server XXX.XXX.XXX.XXX

 

set clock:

clock set 10:30:00 Jul 12 2011

 

show clock:

show clock