On 11 June 2012 18:00, Peter Rathlev <peter at rathlev.dk> wrote: > You need "ntp master" command to enable others to sync with this switch. > Any IOS device that is in NTP sync will act as an NTP server. You only need to set "ntp master" if the switch has a free-running clock i.e. not synchronized to an NTP source. Aled