Hello,
We are getting unknown protocol drops cisco voice router 2921. We are facing sometimes NO AUDIO issue with cisco IP Phones.
When they are dialing exten to exten. How to resolve pls advise ASPL.
IOS ver is c2900-universalk9-mz.SPA.152-4.M3.bin.
sh int gi 0/0
GigabitEthernet0/0 is up, line protocol is up
Hardware is CN Gigabit Ethernet, address is e02f.6d66.0b70 (bia e02f.6d66.0b70)
Description: $ETH-LAN$$ETH-SW-LAUNCH$$INTF-INFO-GE 0/0$
Internet address is 10.100.1.2/23
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set
Keepalive set (10 sec)
Full Duplex, 1Gbps, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:18:52
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 36000 bits/sec, 33 packets/sec
5 minute output rate 29000 bits/sec, 23 packets/sec
38644 packets input, 5375551 bytes, 0 no buffer
Received 11723 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 21 multicast, 0 pause input
27223 packets output, 4307813 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
1936 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
