cannot add subscriber CUCM

question_guy

So I have a demo image of cucm 8.5, i installed it as cucm publisher on Vmware workstation works great.
Now i want to add another vitual machine with unity connection, but it wont pass "first node access configuration".
It will reply "is <cucm> the correct first node for this node?"
Basic setup:

NTP server on GNS3, publisher sync with NTP ok
No DNS used.
All services are running on publisher.
Second server (subscriber, unity connection) is added in System->Server with current ip address. (ping from cucm to subscriber is ok, restart the callmanager service was issued).
Licensing : 150 units, 3 nodes, 1 node used.
I even rested the set password user security to a newer one, still subscriber gives the same message("is <cucm> the correct first node for this node?").

What could be the issue?
Thanks

stlsmoore

CUCM is real specific about the NTP source for the Subscriber. Most Window servers use an older version of NTP (I think V3) and I believe Cisco requires a NTP server that uses version 4 or higher. Otherwise the CUCM will look at the NTP server and automatically make it a stratum 15 or something like that which is no good. What I did was find a Cisco router (2821) and temporary enable it as a NTP master and put it in my lab network. I then pointed my CUCM publisher to the temporary NTP source and then did the reinstall on my subscriber. This worked like a champ for me, my details may be a little off but hopefully this will get you through it.