I have an isue using CM 4.1.3(sr1). 19 Ip Phones 7960 unregisters many of them at the same time. Ussually at 4pm or 5pm or later when there is not much activity at the site. Ive seen this problem in another forum people complaining with the same situation. This are the Reason code 8 events in the event viewer and in the CCM Trace folder log:
The description for Event ID ( 3 ) in Source ( Cisco CallManager ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: DeviceUnregistered - Device unregistered.
Device name.: SEP0012D9B95154
Device IP address.: 172.17.x.x
Device type. [Optional]: 7
Device description [Optional].: Sistemas
Reason Code [Optional].: 8
App ID: Cisco CallManager
Cluster ID: 1902-Cluster
Node ID: 172.17.x.x
Explanation: A device that has previously registered with Cisco CallManager has unregistered. This event may be issued as part of normal unregistration event or due to some other reason such as loss of keepalives.
Recommended Action: No action is required if unregistration of this device was expected..
I think we are hitting a bug in 4.1.3 sr1. Any confirmation from Cisco?
CCM 4.1 uses IP precedence 3 for call control packets instead of the AF31 DSCP that was used in the past. If your QOS is using AF31 you may be dropping control packets. We are on 4.1(3)SR1 and had your exact symptom at one site until we changed the QOS to use IP precedence. It did seem to impact 7960s more than 7940s.
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