input error

Unanswered Question
May 6th, 2010

good morning

i am using cisco 1841 router

at one of my interface i can see "input error" and they grow very fast

at both side (my router and ISP router )the interfaces set to "full duplex" & "speed 100"

please advice?

see my interface details:

Frankfurt#show interfaces fastEthernet 0/1/3
FastEthernet0/1/3 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0025.840b.ef5e (bia 0025.840b.ef5e)
  MTU 1500 bytes, BW 100000 Kbit/sec, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 1w1d, output never, output hang never
  Last clearing of "show interface" counters 01:17:31
  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 212000 bits/sec, 163 packets/sec
  5 minute output rate 37000 bits/sec, 73 packets/sec
     555181 packets input, 90374469 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     1269 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     243684 packets output, 15624404 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 output buffer failures, 0 output buffers swapped out

I have this problem too.
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Ganesh Hariharan Thu, 05/06/2010 - 01:19

good morning

i am using cisco 1841 router

at one of my interface i can see "input error" and they grow very fast

at both side (my router and ISP router )the interfaces set to "full duplex" & "speed 100"

please advice?

see my interface details:

Frankfurt#show interfaces fastEthernet 0/1/3
FastEthernet0/1/3 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0025.840b.ef5e (bia 0025.840b.ef5e)
  MTU 1500 bytes, BW 100000 Kbit/sec, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 1w1d, output never, output hang never
  Last clearing of "show interface" counters 01:17:31
  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 212000 bits/sec, 163 packets/sec
  5 minute output rate 37000 bits/sec, 73 packets/sec
     555181 packets input, 90374469 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     1269 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     243684 packets output, 15624404 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 output buffer failures, 0 output buffers swapped out

Hi,

An input error includes runts,  giants, no buffer, CRC, frame, overrun, and ignored counts. Other input-related  errors can also cause the input error count to be increased. Some datagrams can  have more than one error. when the traffic that passes through that link is high or when it has devices such as servers connected to that interface. This high load of traffic oversubscribes the ports, which exhausts the input buffers and causes the Rx-No-Pkt-Buff counter and input errors to increase rapidly.

Check cables to determine whether any are damaged. Also ensure Category 5 cabling is being used and not another type, such as Category 3 or cable is too long.

Hope to help !!

Ganesh.H

support.golan Thu, 05/06/2010 - 01:37

when you said high traffice what do you mean

at my interface do i pass high packets ?

MplsFrankfurt#show interfaces fastEthernet 0/1/3
FastEthernet0/1/3 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0025.840b.ef5e (bia 0025.840b.ef
  MTU 1500 bytes, BW 100000 Kbit/sec, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 1w1d, output never, output hang never
  Last clearing of "show interface" counters 01:33:25
  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 179000 bits/sec, 139 packets/sec
  5 minute output rate 28000 bits/sec, 59 packets/sec
     697343 packets input, 113353519 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     1625 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     305893 packets output, 19611224 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 output buffer failures, 0 output buffers swapped out
MplsFrankfurt#
MplsFrankfurt#
MplsFrankfurt#
[Connection to 10.128.88.193 closed by foreign host]
London-TT#

spremkumar Thu, 05/06/2010 - 01:41

Hi

What is the device connected onto this interface on the other end? is it a switch or a csu/dsu device ?

regds

support.golan Thu, 05/06/2010 - 01:47

i do not know

i need to check

can you explain me what do you mean by un normal traffice on my interface ?

support.golan Thu, 05/06/2010 - 02:23

you said its chould be a problem on the interface witch make all those problem to come (input error)

maybe when the traffic is to high the error comes ? chould it be?

Ganesh Hariharan Thu, 05/06/2010 - 02:45

when you said high traffice what do you mean

at my interface do i pass high packets ?

MplsFrankfurt#show interfaces fastEthernet 0/1/3
FastEthernet0/1/3 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0025.840b.ef5e (bia 0025.840b.ef
  MTU 1500 bytes, BW 100000 Kbit/sec, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 1w1d, output never, output hang never
  Last clearing of "show interface" counters 01:33:25
  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 179000 bits/sec, 139 packets/sec
  5 minute output rate 28000 bits/sec, 59 packets/sec
     697343 packets input, 113353519 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     1625 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     305893 packets output, 19611224 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 output buffer failures, 0 output buffers swapped out
MplsFrankfurt#
MplsFrankfurt#
MplsFrankfurt#
[Connection to 10.128.88.193 closed by foreign host]
London-TT#

Those are possible reason when your port is connected with server at the other end ,in your case i dont think you are having a huge amount of traffic in this interface as i see input rate it normal.

Ganesh.H

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