Since your phones get their IP addresses from DHCP, can't to look there to see what MAC address was assigned that IP?
In the past, I have utilized the arp cache tables of the switches to find where the IP address is located, then I would look at the mac-address table of that switch to find which port it is connected to. Then I would have to trace out the cables, or if I was organized look up what location that switch port was assigned.
Thank you both fo the feedback! I got a about 6 of these log messages while a problem was being reported by a user (phone restart during a call). I was actually hoping that the missing information could be "enabled" somewhere. That would be the most comfortable way to find te device name. ;-)
We are running our IP phone DHCP servers on the Cisco IOS Voice Gateways without an DHCP agent. Currently the IP assignments are not being logged. I will do a "debug ip dhcp server events" and set the logging level to debug. Or is there a better way to log the events? Once I have this set up I should be able to find the IP to MAC mapping in the future.
It isn't uncommon to not see a device name or other description in a transient connection message. Especially if the issue is a rogue device on the network that is not provisioned in CUCM. You could use RTMT to search for the device by IP address to see if it has registered or is known by any node in your cluster. This is possible using device search.
You may also want to look at the application log on subscriber nodes in the cluster to see if this host is generating unregistered messages there. Most likely those messages will have more identification info.
And, of course, Adam's approach (+5 A.)is a good way to hunt down the device, get the mac address, and possibly disable the port. You can also use "show cdp nei" when you find the port to get more information about the device.
If you find this transient message flooding your logs then it is very likely you have a device attemption to register that isn't configured. If you use Adam's method then you may be able to configure the device in CUCM. Alternately, you can temporarily enable auto-registration to get the device registered and stop the incessant noise (if it can be classified as such). NOTE: there isn't enough info available to guarantee this is what is happening, it is just a hypothesis at this point.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...