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High Total output Drops

Unanswered Question
Mar 28th, 2012
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Hi,


Our database server is connected on cisco swich 2960G

gigabitEthernet 0/38.while showing the interface command the total output drops is a large value..Is there any issue with this value.I think this is one of the reason for slow access of the server.

pls give me a sloution....




cisco6#show interfaces gigabitEthernet 0/38

GigabitEthernet0/38 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 58bc.2746.45a6 (bia 58bc.2746.45a6)

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 4/255

  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 never, output 00:00:01, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2237384

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 18822000 bits/sec, 1636 packets/sec

  5 minute output rate 412000 bits/sec, 576 packets/sec

     359269545 packets input, 484444472380 bytes, 0 no buffer

     Received 20556 broadcasts (1757 multicasts)

     0 runts, 1 giants, 0 throttles

     198 input errors, 197 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 1757 multicast, 0 pause input

     0 input packets with dribble condition detected

     421979270 packets output, 43694459621 bytes, 0 underruns

     0 output errors, 0 collisions, 1 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




Thanks &Regards


Sihanu N

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Leo Laohoo Wed, 03/28/2012 - 21:18
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No other line errors.


I'm suspecting the remote end cannot process the amount of data the switch is pushing.


You can either try QoS or you could try to lower your link speed to see if the output drops decreases.

Sihanu N Wed, 03/28/2012 - 22:17
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Thanks for the reply.For database operation how I enable QOS,what is the command  for the same.


Thanks&Regars

Sihanu N

Leo Laohoo Wed, 03/28/2012 - 22:27
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Let's try something easy:  Try lowering the link speed to 100 Mbps and see if the output drops stop or decreases.

Vasileios Boulo... Wed, 03/28/2012 - 23:55
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I suggest to clear the counters of the interface since

  Last clearing of "show interface" counters never

with the clear counter interface gigabitEthernet 0/38


Then check the CPU of the 2960 to check if the dropped packets are due to high cpu

sh proc cpu

sh proc cpu history


Regards

Vasilis

Sihanu N Thu, 03/29/2012 - 00:21
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Thanks for your reply ,I clear the couter and tahke the cpu usage




cisco6#show processes cpu history


    1111111111111111111111111111111111111111111111111111111111

    2221111111111000000000022222111110000011111222221111100000

100

90

80

70

60

50

40

30

20

10 **********************************************************

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per second (last 60 seconds)


    1111111111111111111111111111111111111111111111111111111111

    2443133122132234221122211101121122211712213111112112022332

100

90

80

70

60

50

40

30

20                                      *

10 ##########################################################

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per minute (last 60 minutes)

              * = maximum CPU%   # = average CPU%


    1353324262432334243222342432222233333232133223343345432228313224244272

    7994629655882192323538612457448205761741924982178122913345197166844507

100

90                                                          *

80                                                          *

70         *                                                *          *

60   *     *                                                *          *

50   *   * * *                                    *   **    *     *    *

40  ** * * * **  ** *    ** **      ***           ** ***    *  *  * ** *

30  **** ****** *** *** *** ***  * *******  *************   ** * ********

20 **********************************************************************

10 ######################################################################

   0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.

             0    5    0    5    0    5    0    5    0    5    0    5    0

                   CPU% per hour (last 72 hours)

                  * = maximum CPU%   # = average CPU%




Tx&Rgds

Sihanu N

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