It technically works. I've done this a lot. It's just Cisco isn't going to help if you're having problems with CUCM Pub not working correctly as an MTP master.
On Mon, May 8, 2017 at 2:19 PM, Charles Goldsmith <wo...@justfamily.org> wrote: > Interesting, all subs for CUCM are pointed to the pub and cannot be > changed, wonder why UCCX and CUC cannot be pointed to it. > > On Mon, May 8, 2017 at 10:25 AM, Daniel Pagan <dpa...@fidelus.com> wrote: > >> Just adding my experience to this… >> >> >> >> I agree and can attest to the stratum-1 server caveat below. After some >> time, the NTP client can get blocked and force you (the general “you”) to >> update your entries in the near future. Of course multiple NTP entries can >> be configured but if you’re doing proactive monitoring of syslog (or >> specific syslog entries), or support multiple UC environments, it can get >> rather annoying and time consuming. >> >> >> >> As for pointing UC apps to the UCM publisher… I opened a TAC case a while >> back specifically to determine if this was officially supported. The idea >> was to assigned all UC applications for a customer, per geographic region, >> to their most local UCM publisher for NTP services. The customer wanted to >> avoid IOS NTP servers, avoid using public NTP sources, and didn’t want to >> spin up a small *NIX VM for this purpose either. >> >> >> >> Long story short, and after escalating to the CE’s lead, it was >> determined that this configuration would not be supported, and any time >> synchronization issues reported to TAC would first require the >> configuration be modified before continuing forward. >> >> >> >> *“Cisco Call Manager might work properly as NTP Master but it is not >> designed for that purpose or not even tested by developer. Publisher of >> CUCM not supported to act as NTP Master [for non CUCM applications].”* >> >> >> >> We ended up using public NTP sources. >> >> >> >> Hope this helps >> >> >> >> - Dan >> >> >> >> >> >> *From:* cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] *On >> Behalf Of *Charles Goldsmith >> *Sent:* Monday, May 8, 2017 10:53 AM >> *To:* Haas, Neal <nh...@co.fresno.ca.us> >> *Cc:* cisco-voip@puck.nether.net >> *Subject:* Re: [cisco-voip] CCX and NTP >> >> >> >> To expand on this, I would point to your voice gateways with everything >> internal, then the voice gateways would either use an on-prem NTP server >> that is radio sync'd or one that Neal has advised. That way, everything is >> synced together with the same source. >> >> >> >> For UCCX and other apps, I point them to the UCM pub and the pub points >> to the voice gateways. >> >> >> >> I've seen a lot of people advise for pool.ntp.org, but that has bitten >> me. How often does an NTP process refresh from DNS? I suspect only on >> reboot or a restart of the NTP process. I've seen too many NTP servers go >> offline when using the pool addresses. Because of that, I've been sticking >> with .gov based NTP on the voice gateway. >> >> >> >> Ryan Huff, one thing about pointing to strata 1 servers, most of them >> have restrictions from what I've seen, while they work, they could block >> you for not being approved if you send too many requests. >> http://support.ntp.org/bin/view/Servers/StratumOneTimeServers has a >> list, and while many have open access listed, if you look at the details, >> they can still have restrictions. >> >> >> >> Just food for thought. >> >> >> >> On Mon, May 8, 2017 at 9:20 AM, Haas, Neal <nh...@co.fresno.ca.us> wrote: >> >> Get an on-prem NTP server, if you cant spend the money, use: >> >> >> >> time.nist.gov global address for all servers Multiple locations >> >> utcnist.colorado.edu 128.138.140.44 University of Colorado, Boulder >> >> utcnist2.colorado.edu 128.138.141.172 University of >> Colorado, Boulder >> >> time-nw.nist.gov 131.107.13.100 Microsoft, Redmond, >> Washington >> >> >> >> Really, anything with a GOV, or EDU should be good. >> >> >> >> By the way, you should NEVER, EVER, EVER (can’t stress this enough) a >> Windows Based NTP. Every place that I have went into and removed a Windows >> Time server, everything has worked better! Windows just cant do time. I >> went into a business with windows NTP, and the guy was checking time from >> about 100 NTP servers, his time was off by three minutes. Took it down to 3 >> and everything started to work. >> >> >> >> Thank You, >> >> >> >> Neal Haas >> >> >> >> *From:* cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] *On >> Behalf Of *Ben Amick >> *Sent:* Monday, May 8, 2017 7:12 AM >> *To:* cisco-voip@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 >> >> >> >> >> Confidentiality Note: This message is intended for use only by the >> individual or entity to which it is addressed and may contain information >> that is privileged, confidential, and exempt from disclosure under >> applicable law. If the reader of this message is not the intended recipient >> or the employee or agent responsible for delivering the message to the >> intended recipient, you are hereby notified that any dissemination, >> distribution or copying of this communication is strictly prohibited. If >> you have received this communication in error, please contact the sender >> immediately and destroy the material in its entirety, whether electronic or >> hard copy. Thank you >> >> >> _______________________________________________ >> cisco-voip mailing list >> cisco-voip@puck.nether.net >> https://puck.nether.net/mailman/listinfo/cisco-voip >> >> >> > > > _______________________________________________ > cisco-voip mailing list > cisco-voip@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-voip > >
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