We are working on implementing 802.1x with our 8851 ip phones. We have installed the LSC cert and enabled 802.1x on a few phones for testing. We are using Cisco ISE and the switch is configured for host mode multi domain. Everything seemed to be working fine, until we noticed the phones were resetting about every 48 minutes. Looking at the logs on the phone it seems it is being reset due to a timeout with CUCM.
ReasonForOutOfService=10 followed by a ReasonForOutOfService=23 My Cisco ISE admin didn't see anything on that side that he thinks is causing the timeout, and we only seem to see this issue after registering the phone with 802.1x enabled. Any thoughts before I start collecting traces and wireshark captures. CUCM v 11.5(1) SU6 IP phones are on latest firmware 12.7 or 12.8 Thanks. Sean.
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