ntp clock-period is a value that the router or switch calculates as it keeps track of the time from the server to which it has synced. If you are pointing the router or switch to a new/different server you do not need to worry about ntp clock-period (no need to remove it) and the router will calculate a new value as it gets sync with the new server.
If you are moving a config from one device to another device it is advisable to remove the ntp clock-period from the config before you load it on the new device.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...