Have same number of runts and input errors on 2960

[sapar.annayev]

Team,

I have a problem with 2960. I see equal number of runts and input errors on the FE ports, interface is up/up, there are "0" packets input, there are output packets...

I have checked some other discussion where there were some input packets, and some runts, input errors....experts suggested to check "duplex" configuration.  In my case there are "0" input packets, and equal number of runts and input errors.  I had same problem on mupltiple interfaces, when I instead of 2960 use DLINK switch, everything works without any issues. Please help solve this, share your experience and ideas.

2960 is used to connect Motorola Base Station to Motorola Server...

Here is the "show int fa0/1" output:

FastEthernet0/1 is up, line protocol is up (connected)

  Hardware is Fast Ethernet, address is 0064.4018.e601 (bia 0064.4018.e601)

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

     reliability 134/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s, media type is 10/100BaseTX

  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: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     0 packets input, 153344 bytes, 0 no buffer

     Received 0 broadcasts (0 multicasts)

     2396 runts, 0 giants, 0 throttles

     2396 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     1384 packets output, 102964 bytes, 0 underruns

     0 output errors, 0 collisions, 3 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

[Talha Ansari]

Hi Sapar,

First notice whether the input errors/runts are incrementing or is it constant.

To begin with configure the load-interval on the interface to 30 seconds. May be a very low amount of traffic is flowing which is not shown in the 5 minutes average I/O which is set as default.

I see that the reliability is low. Could you please check whats the speed/duplex setting on the base station device? Try to change auto-auto on both ends or set speed/duplex at one end and let the other side be auto. Such issues are mostly related to physical layer which includes cables, auto-negotiation, connectors and physical ports.

HTH

Talha

[sapar.annayev]

Hi Talha,

Right, input errors/runts are incrementing, as well as output packets.

Here is the output for Fe0/8:

FastEthernet0/8 is up, line protocol is up (connected)

  Hardware is Fast Ethernet, address is 0064.4018.e608 (bia 0064.4018.e608)

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

     reliability 128/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s, media type is 10/100BaseTX

  input flow-control is off, output flow-control is unsupported

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

  Last input 00:00:15, output 00:00:00, output hang never

  Last clearing of "show interface" counters never

  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 7000 bits/sec, 7 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     356 packets input, 739154 bytes, 0 no buffer

     Received 2 broadcasts (2 multicasts)

     11025 runts, 0 giants, 0 throttles

     11025 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 2 multicast, 0 pause input

     0 input packets with dribble condition detected

     3132 packets output, 228675 bytes, 0 underruns

     0 output errors, 0 collisions, 3 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

Here we do have input packets, and still have same number of runts and input errors as well.

[rsimoni]

Hi Sapar,

as Talha pointed out you need to do some L1 and duplex/speed troubleshooting.

As the ports connected to the Motorola base stations are showing runts and input errors try to move one (i.e. Fa0/8) to another device... a Cisco switch possibly. Send some traffic through it and check the counters.

Likely there is some kind of issue between Motorola and 2960 for which packets is dropped in ingress if duplex/speed is not not correctly negotiated on the link.

Riccardo

[Leo Laohoo]

Can you post the output to the command "sh contr e Fast 0/8" please?

Another way to determine if you have a cable issue is to run a TDR test. 

Now the 2960 has two Gigabit interface.  If you can move this link temporarily to either one of the Gig interface, that will be very, very good.

To test, just follow the process:

1.  [If you can move the link to a GigabitEthernet interface]:

conf t

interface Gig0/<1 or 2>

media rj

end

2.  [If you CANNOT move the link to a GigabitEthernet interface]:  test cable tdr interface ;

3.  Wait for about 5 to 7 seconds;

4.  sh  cable tdr interface ;

5.  Post the output.

Now if you were able to do step #1, you need to "undo":

conf t

interface Gig0/<1 or 2>

media auto

end

Looking forward to see the result.

[sannayev]

Team,

First of all thank you all for your responses. Problem is clear, but how to solve it. I have some more outputs now.

Here is the ouput of the "sh controllers ethernet-controller " command :

Switch#sh int fa0/1

FastEthernet0/1 is up, line protocol is up (connected)

  Hardware is Fast Ethernet, address is 0064.4018.e601 (bia 0064.4018.e601)

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

     reliability 171/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s, media type is 10/100BaseTX

  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: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     0 packets input, 31296 bytes, 0 no buffer

     Received 0 broadcasts (0 multicasts)

     489 runts, 0 giants, 0 throttles

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

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     184 packets output, 14256 bytes, 0 underruns

Switch#sh controllers ethernet-controller fa0/1

      Transmit FastEthernet0/1                 Receive

        14734 Bytes                            32256 Bytes

           28 Unicast frames                       0 Unicast frames

          163 Multicast frames                     0 Multicast frames

            0 Broadcast frames                     0 Broadcast frames

            0 Too old frames                       0 Unicast bytes

            0 Deferred frames                      0 Multicast bytes

            0 MTU exceeded frames                  0 Broadcast bytes

            0 1 collision frames                   0 Alignment errors

            0 2 collision frames                   0 FCS errors

            0 3 collision frames                   0 Oversize frames

            0 4 collision frames                 504 Undersize frames

            0 5 collision frames                   0 Collision fragments

            0 6 collision frames

            0 7 collision frames                 504 Minimum size frames

            0 8 collision frames                   0 65 to 127 byte frames

            0 9 collision frames                   0 128 to 255 byte frames

            0 10 collision frames                  0 256 to 511 byte frames

            0 11 collision frames                  0 512 to 1023 byte frames

            0 12 collision frames                  0 1024 to 1518 byte frames

            0 13 collision frames                  0 Overrun frames

            0 14 collision frames                  0 Pause frames

            0 15 collision frames

            0 Excessive collisions                 0 Symbol error frames

            0 Late collisions                      0 Invalid frames, too large

            0 VLAN discard frames                  0 Valid frames, too large

            0 Excess defer frames                  0 Invalid frames, too small

          175 64 byte frames                       0 Valid frames, too small

            9 127 byte frames

            0 255 byte frames                      0 Too old frames

            7 511 byte frames                      0 Valid oversize frames

            0 1023 byte frames                     0 System FCS error frames

            0 1518 byte frames                     0 RxPortFifoFull drop frame

            0 Too large frames

            0 Good (1 coll) frames

            0 Good (>1 coll) frames

Here is the output for the "sh int counters error " command :

Switch#sh interfaces counters errors

Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize  OutDiscards

Fa0/1               0           0           0        1232       1232            0

Fa0/2               0           0           0           0          0            0

Fa0/3               0           0           0           0          0            0

Fa0/4               0           0           0           0          0            0

Fa0/5               0           0           0           0          0            0

Fa0/6               0           0           0           0          0            0

Fa0/7               0           0           0           0          0            0

Fa0/8               0           0           0           0          0            0

Fa0/9               0           0           0           0          0            0

Fa0/10              0           0           0           0          0            0

Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize  OutDiscards

Fa0/11              0           0           0           0          0            0

Fa0/12              0           0           0           0          0            0

Fa0/13              0           0           0           0          0            0

Fa0/14              0           0           0           0          0            0

Fa0/15              0           0           0           0          0            0

Fa0/16              0           0           0           0          0            0

Fa0/17              0           0           0           0          0            0

Fa0/18              0           0           0           0          0            0

Fa0/19              0           0           0           0          0            0

Fa0/20              0           0           0           0          0            0

Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize  OutDiscards

Fa0/21              0           0           0           0          0            0

Fa0/22              0           0           0           0          0            0

Fa0/23              0           0           0           0          0            0

Fa0/24              0           0           0           0          0            0

Gi0/1               0           0           0       53683      53683            0

Gi0/2               0           0           0         654        654            0

Port      Single-Col  Multi-Col   Late-Col  Excess-Col  Carri-Sen      Runts     Giants

Fa0/1              0          0          0           0          0       1239          0

Fa0/2              0          0          0           0          0          0          0

Fa0/3              0          0          0           0          0          0          0

Port      Single-Col  Multi-Col   Late-Col  Excess-Col  Carri-Sen      Runts     Giants

Fa0/4              0          0          0           0          0          0          0

Fa0/5              0          0          0           0          0          0          0

Fa0/6              0          0          0           0          0          0          0

Fa0/7              0          0          0           0          0          0          0

Fa0/8              0          0          0           0          0          0          0

Fa0/9              0          0          0           0          0          0          0

Fa0/10             0          0          0           0          0          0          0

Fa0/11             0          0          0           0          0          0          0

Fa0/12             0          0          0           0          0          0          0

Fa0/13             0          0          0           0          0          0          0

Port      Single-Col  Multi-Col   Late-Col  Excess-Col  Carri-Sen      Runts     Giants

Fa0/14             0          0          0           0          0          0          0

Fa0/15             0          0          0           0          0          0          0

Fa0/16             0          0          0           0          0          0          0

Fa0/17             0          0          0           0          0          0          0

Fa0/18             0          0          0           0          0          0          0

Fa0/19             0          0          0           0          0          0          0

Fa0/20             0          0          0           0          0          0          0

Fa0/21             0          0          0           0          0          0          0

Fa0/22             0          0          0           0          0          0          0

Fa0/23             0          0          0           0          0          0          0

Port      Single-Col  Multi-Col   Late-Col  Excess-Col  Carri-Sen      Runts     Giants

Fa0/24             0          0          0           0          0          0          0

Gi0/1              0          0          0           0          0      54019          0

Gi0/2              0          0          0           0          0        654          0

Switch#

Now, I changed IOS from "c2960-lanbasek9-mz.122-44.SE6" to "c2960-lanbasek9-mz.150-1.SE.bin" and still have the same problem. So, question now is what should I do to make 2960 pass the undersize packets ?

[amikat]

Hi,

Can you please post the "sh int fa0/1 sw" command output.

Thanks & Regards,

Antonin

[sannayev]

Antonin,

Here is the output you've asked for:

Switch#sh int gig 0/1

GigabitEthernet0/1 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 0064.4018.e619 (bia 0064.4018.e619)

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

     reliability 176/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 100Mb/s, link type is auto, 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 00:00:17, 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: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     19760 packets input, 1102205200 bytes, 0 no buffer

     Received 11503 broadcasts (11444 multicasts)

     17178854 runts, 0 giants, 0 throttles

     17178854 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 11444 multicast, 0 pause input

     0 input packets with dribble condition detected

     199869 packets output, 15358372 bytes, 0 underruns

Switch#sh int gig 0/1 sw

Name: Gi0/1

Switchport: Enabled

Administrative Mode: dynamic auto

Operational Mode: static access

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: native

Negotiation of Trunking: On

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 1 (default)

Administrative Native VLAN tagging: enabled

Voice VLAN: none

Administrative private-vlan host-association: none

Administrative private-vlan mapping: none

Administrative private-vlan trunk native VLAN: none

Administrative private-vlan trunk Native VLAN tagging: enabled

Administrative private-vlan trunk encapsulation: dot1q

Administrative private-vlan trunk normal VLANs: none

Administrative private-vlan trunk associations: none

Administrative private-vlan trunk mappings: none

Operational private-vlan: none

Trunking VLANs Enabled: ALL

Pruning VLANs Enabled: 2-1001

Capture Mode Disabled

Capture VLANs Allowed: ALL

Protected: false

Unknown unicast blocked: disabled

Unknown multicast blocked: disabled

Appliance trust: none

Switch#

This is connected to DLink switch first. DLINK is unmanaged and connected to the server. I cant remove DLINK right now, as network is used right now. I see input errors, unstable reliability and runts on the interface connected to DLINK, checked FE and GE.

[amikat]

Hi,

Thanks for the reply. If your Cat2960 is connected to D-link switch at the moment then the output is not of much usage. If you can later on try to connect it either to the server or base station directly (maintenance window) I would suggest to hardcode the port not to trunk ("switchport mode access") - at least for the test purposes. If you go for that suggestion then you may also need to configure the other end (if you are using more vlans then for the test purpose please allow just one. You can then observe if there is any progress. I can remember this type of problem in the old days when switches used the (Cisco proprietary) ISL trunking encapsulation which added much more overhead to the Ethernet frames and after stripping off the encapsulation the frames were reported as runts in particular situation. I hope that my post makes sense for you.

Best regards,

Antonin

[Amit Singh]

What is the configuration of this port? Have you tried swapping the cables?

Has both the sides been configured for auto nego or hard coded on speed/duplex.

Sent from Cisco Technical Support iPad App

[dawlims0920]

I know this question has been raised quite some time, but I just wanted to share my resolution for this problem. I was having this same problem on our 2800 router. I tried replacing the cable as well as using a different router port and still the issue was not resolved. We ended up calling the telco and having them check their speed/duplex settings, lo and behold it was indeed a speed/duplex mismatch. After nailing both sides to 100full, then the issue got resolved. No more runts and input errors, line was up and clear ever since. Thanks

[hanyawad]

Hello to all,

have anyone experienced outage in a random timings while he had this issue? because i've been monitoring my client's switched network for the outage he has and i noticed in the reports that i have the same problem on few switches ports.

i apprecaite your recommendation.

regards,

Labib