I just replaced several 3750E stacks with C9300's and all is well except for generating Unknown Protocol Drops? I've notice the counters are incrementing almost evenly across all interfaces with an IP Phone or LWAP? I'm probably over looking something obvious here, anyone have any experience with this issue?
CDP maybe?
Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 62 C9300-48UXM 16.6.3 CAT9K_IOSXE INSTALL
CAP702W
TwoGigabitEthernet1/0/5 is up, line protocol is up (connected)
Hardware is Two Gigabit Ethernet, address is 6c6c.d3c7.7285 (bia 6c6c.d3c7.7285)
Description: wireless AP
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 100/1000/2.5GBaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 4000 bits/sec, 3 packets/sec
5 minute output rate 39000 bits/sec, 4 packets/sec
117882757 packets input, 24753833327 bytes, 0 no buffer
Received 180208 broadcasts (148129 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 148129 multicast, 0 pause input
0 input packets with dribble condition detected
437401196 packets output, 357511526832 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
64413 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
CAP702W
TwoGigabitEthernet1/0/6 is up, line protocol is up (connected)
Hardware is Two Gigabit Ethernet, address is 6c6c.d3c7.7286 (bia 6c6c.d3c7.7286)
Description: wireless AP
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 100/1000/2.5GBaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 109000 bits/sec, 87 packets/sec
5 minute output rate 3822000 bits/sec, 507 packets/sec
129543197 packets input, 37923530375 bytes, 0 no buffer
Received 180209 broadcasts (148130 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 148130 multicast, 0 pause input
0 input packets with dribble condition detected
373229872 packets output, 291756846800 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
64416 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
IP Phone
TenGigabitEthernet1/0/43 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 6c6c.d3c7.72ab (bia 6c6c.d3c7.72ab)
Description: Lobby Phone
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is 100/1000/2.5G/5G/10GBaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
287189 packets input, 34628364 bytes, 0 no buffer
Received 127416 broadcasts (63436 multicasts)
0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 63436 multicast, 0 pause input
0 input packets with dribble condition detected
3547235 packets output, 293301469 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
31714 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
