How to make NTP work despite a high offset?

ujjain asked:

Recently I have kickstarted some servers that had their time off by a month in the bios. The time in the bios said it was a random time/date in May, while it was June.

This caused NTP not to work, because NTP doesn’t sync with such a high offset. How can I make sure that NTP syncs despite the offset, in this case a month, being too high?

My answer:

For EL5 and EL6:

Start ntpdate as well.

It should be sufficient to enable them in your kickstart.

chkconfig ntpdate on
chkconfig ntpd on

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