Interface output erros incrementing.

Unanswered Question
Apr 15th, 2010
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Hi All,


I am getting the output erros in the switch interface:-


sh int gi 1/37
GigabitEthernet1/37 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0005.7443.9ea8 (bia 0005.7443.9ea8)
  Description: Connected-to-NokiaFW
  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 10/100/1000BaseT
  input flow-control is off, output flow-control is off
  Clock mode is auto
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:11, output hang never
  Last clearing of "show interface" counters 1w2d
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 52366938




  Queueing strategy: fifo


Kindly advice how to resolve this issue

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droeun141 Thu, 04/15/2010 - 06:07
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Could be a duplex mismatch.  Are both sides hard set to 1gb?

subashmbi Thu, 04/15/2010 - 06:33
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Already setted to the 1gb and duplex full.but same errors are incrementing.

francisco_1 Thu, 04/15/2010 - 06:49
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Is the other end or the switch setup the same? what is it?


post "show int status"


Have you replaced cable?

subashmbi Thu, 04/15/2010 - 08:48
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Hi,


I am facing this issue in 5 ports in this module (6500)


Connection details:-


SW Gi 1/33(Access-Port)----------------------Router(Gi 0/0)



I didn,t tried the cable changing..




What is the reason for the output drops comming in interface; how we can overcome this error.


Kindly advice

francisco_1 Thu, 04/15/2010 - 09:00
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Output drops are caused by a congested interface.



  • Check your speed and duplex is setup to full duplex on both sides, if problem still exist  try change cable

  • If output drops still occur after you adjust the configuration of the router as recommended, it means that you cannot prevent or decrease output drops. However, you can control them, and this can be as effective as prevention. There are two approaches to control output drops:

    • Congestion management

    • Congestion avoidance

    Leo Laohoo Thu, 04/15/2010 - 15:31
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    What card is this and what is the router at the far end?

    subashmbi Fri, 04/16/2010 - 05:55
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    The card model is WS-X6548-GE-TX. The router is connected directily...

    rupam_chakra1983 Fri, 04/16/2010 - 06:32
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    check the

    1. network cable

    2. device speed harcoded

    3. Post sh controller int < interface_id> config

    4. Is the other end connected to a hub or switch ,try to coonect to some other switch port where problem is not there

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