I tried to disable QOS function to a port of switch 3750 by following commands, then tried to clear its counter
(config)#int g3/0/24
no mls qos
#clear mls qos interface g3/0/24 statistics
#clear counters g3/0/24
But it doesn't work , I still see some "output drops" on the interface;
I execute "show mls qos int g3/0/24 statistics " command, there are still 11 output drops in queue3 threshold3.(see below)
#sh mls qos int g3/0/24 statistics
GigabitEthernet3/0/24 (All statistics are in packets)
dscp: incoming
-------------------------------
0 - 4 : 12913 0 7642 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 4527 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 4 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 3 0 1561 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
-------------------------------
0 - 4 : 40073 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 302 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
-------------------------------
0 - 4 : 26887 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
-------------------------------
0 - 4 : 44093 0 0 0 0
5 - 7 : 0 302 503
output queues enqueued:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 4651 0 503
queue 2: 0 0 0
queue 3: 0 0 39744
output queues dropped:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 0 0 0
queue 2: 0 0 0
queue 3: 0 0 11 ---> dorps!
Policer: Inprofile: 0 OutofProfile: 0
By command of "show interface g3/0/24" , I also see 11 output drops , and the output data is 57827903 bytes =55.14899 Megabytes during the time
LRC199SW203#sh int g3/0/24
GigabitEthernet3/0/24 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is b0fa.eb62.8f98 (bia b0fa.eb62.8f98)
Description: 168 xxxx Ave fl 3 AP3602E-160LRC3D
MTU 1500 bytes, BW 1000000 Kbit, 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 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:06, output 00:00:50, output hang never
Last clearing of "show interface" counters 00:37:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 11 ---> drops!
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 44000 bits/sec, 14 packets/sec
5 minute output rate 193000 bits/sec, 52 packets/sec
78282 packets input, 36263371 bytes, 0 no buffer
Received 158 broadcasts (120 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 120 multicast, 0 pause input
0 input packets with dribble condition detected
121867 packets output, 57827903 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
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
To make sure I already disabled QOS on the interface, I type following show commands to verify
"sh mls qos int g3/0/24"
GigabitEthernet3/0/24
QoS is disabled. When QoS is enabled, following settings will be applied
trust state: trust cos
trust mode: trust cos
trust enabled flag: ena
COS override: dis
default COS: 0
DSCP Mutation Map: Default DSCP Mutation Map
Trust device: none
qos mode: port-based
"sh mls qos int g3/0/24 policers"
GigabitEthernet3/0/24
QoS is disabled. When QoS is enabled, following settings will be applied
sam wang
