I have a powered IAP-175 that is in a freezer. The unit has been working fine until recently I got a report that the IAP was not functioning. I logged onto the VC and noticed the AP was missing. On the switch I see the AP connected and via ARP I can see it is getting an address via DHCP. I can't ping the AP by that address, which made me question what was going on.
I looked at the switch port and the output shows there are "unkown protocol errors". I reset the interface to see if the errors kept occurring and they have. I cleared the configuration on the switchport and told it to do nonnegotiate. The errors keep occurring. Cisco says the unknown protocol errors have to know with lets say one device talking cdp and the other not. Anyways below is the output and the switchport config.
Any advice or suggestions?
GigabitEthernet1/0/44 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is f029.29d5.0cac (bia f029.29d5.0cac)
Description: AP-14
MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:01, output hang never
Last clearing of "show interface" counters 2d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 3 packets/sec
211275 packets input, 23549727 bytes, 0 no buffer
Received 211260 broadcasts (5837 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 5837 multicast, 0 pause input
0 input packets with dribble condition detected
683436 packets output, 67277126 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
5815 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
interface GigabitEthernet1/0/44
description AP-14
switchport access vlan 20
switchport mode access
switchport nonegotiate
switchport voice vlan 11
spanning-tree portfast