Yup, looks like a continuous loop of each server being told about the new cert, 
then telling the rest of the cluster about it.  The delay is likely related to 
the fact that we require a delay before subsequent certs can be 
regenerated/installed specifically to allow the phones to reset and pick up a 
new ITL.  No more regenerating tomcat + CallManager certs at the same time and 
nuking your ITLs.

-Ryan

On Oct 9, 2014, at 2:41 PM, Matthew Loraditch 
<[email protected]<mailto:[email protected]>> 
wrote:

Yes this is the bug, it is super fun… Migrated to a customer to 10.5 and 
updated the certs.. spent a day finding out this was the bug.. I am eagerly 
awaiting SU1.
Something to do with the sever being on multiple servers it continuously sends 
the cert to the other servers which causes the change notification.

Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA
1965 Greenspring Drive
Timonium, MD 21093

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From: cisco-voip [mailto:[email protected]] On Behalf Of Brian 
Meade
Sent: Thursday, October 09, 2014 2:32 PM
To: Jason Aarons (AM)
Cc: cisco-voip ([email protected]<mailto:[email protected]>)
Subject: Re: [cisco-voip] Bug with mult-server certificate and phones reset 
every 7 min?

That's what it looks like.  Starting in CUCM version 8.6, we started resetting 
all registered phones on the cluster whenever a certificate used in the ITL 
changed.  This was to prevent the ITL from changing too much at once before the 
phones go the update such as regenerating CallManager.pem and TVS.pem at the 
same time which will force you to have to delete the ITL on all phones unless 
the phones got the updated ITL after the first certificate was regenerated.

It sounds like this bug is due to that behavior but I'm not sure why it repeats 
every 7 minutes.  I would expect it to only happen the single time when the 
certificate database is updated.

On Thu, Oct 9, 2014 at 1:52 PM, Jason Aarons (AM) 
<[email protected]<mailto:[email protected]>> wrote:
https://tools.cisco.com/bugsearch/bug/CSCup28852

The way I read this (it’s not in a fixed version of CallManager yet) is that 
after you Upload Certificate a multi-server certificate you have to stop the 
Cisco Certificate Change Notification (CCMServe > Tools > network Services > 
Cisoc Certificate Change Notification.

If you don’t do this then the phones will reset every 7 minutes? Am I right in 
reading the bug?

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