I have a six switch 3850 stack that has been in production for over a month now, and everything is running normal. Last week, hosts plugged into one of the switches stopped working, the hosts are not getting an IP address (this is access layer so PC's and phones). In addition, if I look at the MAC address table for a port, I am not seeing a MAC address.
All of them are running 03.03.03SE cat3k_caa-universalk9 .
I am thinking this is hardware related, only because on occasion I see the following messages in the logs:
Dec 17 12:21:18.052: %IOSXE-3-PLATFORM: MEMBER: 5 process fed: : -Traceback=1#88b11e4e26f5ac75f4f2f18f023e5220 :550E7000+3B9240 ngwcutils:2AF2C000+BE94 ngwcutils:2AF2C000+DA9C pthread:2E3C2000+5DC8
Also, I have a phone in a port on this switch for troubleshooting. When I removed the service-policy from the port to rebuild the port configuration, I received this message:
%FED_QOS_ERRMSG-3-QUEUE_BUFFER_HW_ERROR: MEMBER: 5 fed: Failed to allocate buffers for Gi5/0/1: code 18.