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Webcast-Catalyst9k
New Member

many input errors !!!!

Hello,

We have seen many input errors.

We have swapped the router, the card, coaxial cable, also has made ​​an upgrade of the IOS.

The local provider has changed the Fiber Converter.
All tests made ​​logical loop results in a converter problem but physical loops made ​​by the supplier certifies that the circuit is OK

Serial1/0 is up, line protocol is up
  Hardware is DSXPNM Serial
    MTU 1500 bytes, BW 34000 Kbit/sec, DLY 200 usec,
    reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation FRAME-RELAY IETF, crc 16, loopback not set
  Keepalive set (10 sec)
  LMI enq sent  2164, LMI stat recvd 2164, LMI upd recvd 0, DTE LMI up
  LMI enq recvd 0, LMI stat sent  0, LMI upd sent  0
  LMI DLCI 0  LMI type is ANSI Annex D  frame relay DTE  segmentation inactive
  FR SVC disabled, LAPF state down
  Broadcast queue 0/64, broadcasts sent/dropped 360/0, interface broadcasts 0
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 06:00:39
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Class-based queueing
  Output queue: 0/1000/0 (size/max total/drops)
  30 second input rate 1000 bits/sec, 2 packets/sec
  30 second output rate 1000 bits/sec, 2 packets/sec
    34300 packets input, 6830559 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 6701 giants, 0 throttles
    6701 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    52802 packets output, 41453089 bytes, 0 underruns
    0 output errors, 0 collisions, 0 interface resets
    0 unknown protocol drops
    0 output buffer failures, 0 output buffers swapped out
    0 carrier transitions
DSU mode 1, bandwidth 34000, real bandwidth 34010, scramble 0

interface Serial1/0
  mtu 1500
bandwidth 34000
no ip address
encapsulation frame-relay IETF
load-interval 30
tx-ring-limit 1
tx-queue-limit 1
dsu bandwidth 34000
dsu mode 1
frame-relay lmi-type ansi
max-reserved-bandwidth 100
service-policy input Marcado_IN
service-policy output Marcado_OUT
end

Can anybody help me to find the mistake?

Thanks in advance for your help

Everyone's tags (2)
2 ACCEPTED SOLUTIONS

Accepted Solutions

Re: many input errors !!!!

Who is the DTE? Why is that inactive?

Try the sh controllers interface command and you will see the real state of the connection

Remember to take out your policy to connect the cable and to apply your policies again. sometimes it gets stuck for this.

Alessio

Hall of Fame Super Gold

many input errors !!!!

Remove this:

mtu 1500

9 REPLIES

Re: many input errors !!!!

Who is the DTE? Why is that inactive?

Try the sh controllers interface command and you will see the real state of the connection

Remember to take out your policy to connect the cable and to apply your policies again. sometimes it gets stuck for this.

Alessio

VIP Purple

many input errors !!!!

Hi,

Can you please clear the interface  and then reduce the size of MTU and test it.

Regards

New Member

many input errors !!!!

Hi Sandeep,

The input errors also occurs when there is only traffic management by the circuit. I understand that this should not be the problem, I'll change the MTU settings. :-)

Thanks

Hall of Fame Super Gold

many input errors !!!!

You should never change ot reduce MTU settings.

New Member

many input errors !!!!

The sesion BGP is shutdown because the conexion is commuted to backup

E3 1/0 is up.

  Applique type is Subrate E3

  No alarms detected.

  Framing is G751 Line Code is HDB3, Clock Source is Line.

  Data in current interval (260 seconds elapsed):

     0 Line Code Violations, 0 P-bit Coding Violation

     0 C-bit Coding Violation

     0 P-bit Err Secs, 0 P-bit Severely Err Secs

     0 Severely Err Framing Secs, 0 Unavailable Secs

     0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

  Total Data (last 4 15 minute intervals):

     0 Line Code Violations, 0 P-bit Coding Violation,

     0 C-bit Coding Violation,

     0 P-bit Err Secs, 0 P-bit Severely Err Secs,

     0 Severely Err Framing Secs, 0 Unavailable Secs,

     0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

This interface serial is the next point:

Serial4/0/1 is up, line protocol is up

  Hardware is C10K E3/T3 Eight Port (E3 Mode)

  MTU 4470 bytes, BW 34000 Kbit, DLY 200 usec,

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

  Encapsulation FRAME-RELAY IETF, crc 16, loopback not set

  Keepalive set (10 sec)

  LMI enq sent  0, LMI stat recvd 0, LMI upd recvd 0

  LMI enq recvd 7850, LMI stat sent  7850, LMI upd sent  0, DCE LMI up

  LMI DLCI 0  LMI type is ANSI Annex D  frame relay DCE  segmentation inactive

  Broadcast queue 0/256, broadcasts sent/dropped 0/0, interface broadcasts 0

  Last input 00:00:04, output 00:00:05, output hang never

  Last clearing of "show interface" counters 21:48:25

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

  Interface Serial4/0/1 queueing strategy: PXF Class-based

  5 minute input rate 4000 bits/sec, 2 packets/sec

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

     123968 packets input, 70511776 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

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

     112552 packets output, 37282424 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

Super Bronze

many input errors !!!!

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Posting

Did you notice, in your orginal post, your input errors count is the same as giants?

Hall of Fame Super Gold

many input errors !!!!

Remove this:

mtu 1500

New Member

many input errors !!!!

Dear All,

Should I change the MTU in the PE?

CE:

#show int Serial1/0
Serial1/0 is up, line protocol is up
  Hardware is DSXPNM Serial

  MTU 1500 bytes, BW 34000 Kbit/sec, DLY 200 usec,

PE:

#show interface Serial4/0/1

Serial4/0/1 is up, line protocol is up

  Hardware is C10K E3/T3 Eight Port (E3 Mode)

  MTU 4470 bytes, BW 34000 Kbit, DLY 200 usec,

Hall of Fame Super Silver

many input errors !!!!

Hello Antonio,

the MTU has to be the same at the two ends of the link:

or you set the MTU to 4470 bytes on CE or you set the MTU to 1500 bytes on PE node.

Your giant errors are caused by this MTU mismatch

Hope to help

Giuseppe

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