I am trying to enable NTP as the source for the loopback interface and when I set the command "ntp source Loopback0" the router says the following:
Router(config)#ntp source Loopback0
ntpio_set_global_source failed
Router(config)#
Jan 27 21:19:24.471 UTC: ntpio_set_global_source: not an NTP interface.
Any ideas on why this can't be done.