[cisco-voip] CCX and NTP

[Ryan Huff]

Hey Ben,


This has less to do with UCCX and more to do with the lack of time precision in Windows SNTP / NTP compared to the needs of UCOS. Yes, I know, die hard Redmond boys and girls will say that ever since Win2003 that isn't the case but sorry, it is. (read: https://technet.microsoft.com/en-us/library/cc773013%28v=ws.10%29.aspx). In fact, on page 84 (PDF page) of the latest SRND (http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab11/collab11.pdf) Windows NTP is a flat nono for Cisco UC period.


IOS routers are great but here is how I like to roll (excuse the crudeness of the drawing, put it together this morning before coffee). I typically use Linux servers for NTP because they are so darn useful for other utilitarian things ..... can't count how many times just having a Linux box on the network somewhere helped me out.


[cid:707cfe52-13c4-44bb-b4f2-d2f3d3fcf2ef]


= Ryan =



________________________________
From: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Ben Amick <bamick at HumanArc.com>
Sent: Monday, May 8, 2017 10:12 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] CCX and NTP


What do you guys use for NTP on your CCX hosts? I’ve been informed by TAC that “CCX does not support Windows based NTP” so I was thinking about just pointing NTP towards my CCM hosts – is that a valid scenario? I figure that since CCM is pretty much authoritative on everything for CCX as it is it wouldn’t be a problem?



Ben Amick

Telecom Analyst



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