Input error

Unanswered Question
May 19th, 2010

hello

i am useing cisco 1841 router connected to my server IBM X3550 both interfaces set to 100 MB/Full duplex,even thats i see an input error.

what should i do ?

i try to change it to speed & duplex to auto

my server connected to router directly(no swtich or other accessories betwean them)

thanks

golan

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Overall Rating: 5 (2 ratings)
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Giuseppe Larosa Thu, 05/20/2010 - 01:25

Hello Golan,

what type of errors are you seeing?

post a sh interface fas0/x

Hope to help

Giuseppe

support.golan Thu, 05/20/2010 - 01:31

router#show interfaces fastEthernet 0/0
FastEthernet0/0 is up, line protocol is up

  Hardware is Gt96k FE, address is 0024.14fc.0204 (bia 0024.14fc.0204)

  Description: router-server(london)

  Internet address is 10.2.1.2/30

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

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

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s, 100BaseTX/FX

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:07:28, output 00:00:00, output hang never

  Last clearing of "show interface" counters 1w3d

  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 503000 bits/sec, 724 packets/sec

  5 minute output rate 2000 bits/sec, 4 packets/sec

     268678717 packets input, 2538389555 bytes

     Received 1246 broadcasts, 0 runts, 0 giants, 0 throttles

     2083 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog

     0 input packets with dribble condition detected

     1752741 packets output, 141470490 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

router#i

Giuseppe Larosa Thu, 05/20/2010 - 01:35

Hello Golan,

>> 268678717 packets input, 2538389555 bytes

     Received 1246 broadcasts, 0 runts, 0 giants, 0 throttles

     2083 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

2083 errored packets over 268678717 is not a real issue

Hope to help

Giuseppe

support.golan Thu, 05/20/2010 - 01:46

thanks

but for me its real issue,can i change it to ZERO ?

the reason is 2083 becuase there is no traffice,but if the traffic growth as the same the input error are growth toghter.

thanks golan

Giuseppe Larosa Thu, 05/20/2010 - 02:43

Hello Golan,

I understand

what hits my attention is that the input error should appear under one category like ignored or CRC error or runt.

in your show we don't see this, the errors do not belong to a known category.

This doesn't help in finding a solution

I would focus on flow control: the server may be moving packets too fast for the router

Hope to help

Giuseppe

Scott Conklin Fri, 05/21/2010 - 12:21

I would issue the clear counters command and then monitor the interfaces to see if the input errors increment again.

Paolo Bevilacqua Fri, 05/21/2010 - 12:47
but for me its real issue,can i change it to ZERO ?

In networking there is no such thing as "for me".

Things are what they are, not what you want them to be.

As Giusepped correctly stated, the error ratio is so small to be negligible, and has to be ignored. I have rated his post.

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