My company has recently upgraded to IOS c2801-adventerprisek9-mz.124-24.T3.bin. All routers routers are configured with two ntp servers. Routers with the above IOS need a great amount of time (even up to a day or more if not triggered manaully - reapply appropriate commands) to synchronize their clocks after a reboot occurs, whereas all other routers need only minutes.
In a cisco site I found the following:
Note: The ntp clock-period command is added automatically to jump-start the NTP frequency compensation when the box is rebooted. (Do not configure this command manually.) This is essentially a representation of the frequency of the crystal used as the local timebase, and may take several days to calculate otherwise. Use the write mem command after a week or so to save a good value.
None of the latest IOS routers have this command. Is there anyway to overcome this problem? Anything else I need to do, so that the ntp clock-period appears?
Is it a bug in the IOS?
Any help will be highly appreciate!