Hey folks. I had a weird one this week. I had three new wireless phones get the same error. Registration rejected.
During troubleshooting, I stopped and restarted the TFTP service to no avail.
Finally, I took a guess and turned off auto registration on our Subscriber and Publisher, and then turned it back on.
The phones all registered.
My question is this... What the heck?? Why did that fix it?
Alex is correct on this, your assumption that they recicle is wrong.
When it comes to auto registration CUCM only knows this 3 things
What DN to start from, on what DN to stop and a field which has the next-DN to assign for auto-registration until it's equial to the last DN from the pool you created.
CUCM doesn't go back and check if you're no longer using the DNs or if you have deleted the DNs.
If this helps, please rate
As far as I know the DNs in auto reg do not recycle.
Lets say you just had
1001 - 1029 set
You plug in the phones say 40 of them
The 1st 29 will get Auto-reg assigned.
You go to CUCM and move the phone to new DNs say 2XXX range.
The remaining phones will still not register till you rest the AUTO-REG
I dont know if your set up keeps the auto-reg number or do you change the DNs once registered.