I have some different switches in DNA with problem "High input/output discard on Switch interfaces"
for example
cisco c2960+24PC-L - with Physical Access Control System devices and ip cams, there is not much traffic, about 45mbit output and 1.5mbit input, but sometime I see OQD: pkts dropped from output queue to ip cams and Physical Access Control System devices
sh int summary
*: interface is up
IHQ: pkts in input hold queue IQD: pkts dropped from input queue
OHQ: pkts in output hold queue OQD: pkts dropped from output queue
RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
TRTL: throttle count
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-----------------------------------------------------------------------------------------------------------------
* Vlan1 0 0 0 0 27000 51 2000 2 0
* FastEthernet0/1 0 0 0 2278 0 0 130000 38 0
* FastEthernet0/2 0 0 0 2284 0 0 130000 39 0
* FastEthernet0/3 0 0 0 2293 0 0 130000 38 0
* FastEthernet0/4 0 0 0 2290 0 0 130000 38 0
* FastEthernet0/5 0 0 0 2288 0 0 130000 38 0
* FastEthernet0/6 0 0 0 2300 2605000 295 179000 134 0
* FastEthernet0/7 0 0 0 2295 2722000 300 187000 143 0
* FastEthernet0/8 0 0 0 2289 4029000 472 250000 280 0
* FastEthernet0/9 0 0 0 2303 2892000 342 223000 217 0
* FastEthernet0/10 0 0 0 2299 2859000 325 213000 206 0
* FastEthernet0/11 0 0 0 2324 2819000 318 214000 205 0
* FastEthernet0/12 0 0 0 2292 2730000 300 206000 193 0
* FastEthernet0/13 0 0 0 2302 2888000 354 222000 221 0
* FastEthernet0/14 0 0 0 2298 2844000 353 222000 222 0
* FastEthernet0/15 0 0 0 2323 2766000 344 220000 213 0
* FastEthernet0/16 0 0 0 2291 2953000 353 226000 223 0
* FastEthernet0/17 0 0 0 2294 2695000 333 215000 209 0
* FastEthernet0/18 0 0 0 2304 2726000 326 214000 206 0
* FastEthernet0/19 0 0 0 2278 2694000 334 216000 210 0
* FastEthernet0/20 0 0 0 2304 2494000 276 204000 181 0
* FastEthernet0/21 0 0 0 2310 2439000 271 202000 177 0
* FastEthernet0/22 0 0 0 0 0 0 0 0 0
* FastEthernet0/23 0 0 0 0 0 0 0 0 0
* FastEthernet0/24 0 0 0 0 0 0 0 0 0
* GigabitEthernet0/1 0 0 0 0 2341000 2860 45326000 5331 0
* GigabitEthernet0/2 0 0 0 0 0 0 1000 1 0
sh mls qos interface fa 0/3 statistics
FastEthernet0/3 (All statistics are in packets)
dscp: incoming
-------------------------------
0 - 4 : 2688408 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 0 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 : 700002169 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 : 1248 0 0 0 0
45 - 49 : 0 444437 0 80 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 : 5543687 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
-------------------------------
0 - 4 : 1132558158 0 0 0 0
5 - 7 : 0 782690 0
output queues enqueued:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 19101 5443268 16196599
queue 2: 0 0 0
queue 3: 0 0 1133881995
output queues dropped:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 2285 8 0
queue 2: 0 0 0
queue 3: 0 0 18016508
Policer: Inprofile: 0 OutofProfile: 0
mls qos is disabled by default, because I don't need to mark traffic on this switch, and I don't understand why it happens
maybe some burst?
