I believe that you need to make sure that all servers are synced with same NTP. Usually, I sync my CUCM with external NTP and all other nodes to CUCM.
In the exam it depends on the requirement. Regards, Mohammed Al Baqari From: ccie_voice-boun...@onlinestudylist.com [mailto:ccie_voice-boun...@onlinestudylist.com] On Behalf Of Ken Wyan Sent: Wednesday, April 18, 2012 11:48 AM To: ccie_voice@onlinestudylist.com Subject: [OSL | CCIE_Voice] NTP Server for Presence For CUPS server , is there a recommendation to use CUCM Publisher as NTP server? Otherwise is it ok to use an external ntp server? Ken
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