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ASR9K Interface Input Errors?


I got a ticket today and it was in regard to the error count on one of the TenG interfaces on one of our ASR9K's. In looking at the interface I noticed quite a few Input Errors on the port. I cleared the counters and monitored. In checking the port again I saw the Input Errors again incrementing. On the smaller Cisco switches you can ususally run the show interface gig 1/1/1 counters error command. With the ASRs you can not. I am wondering if someone could explain what the Input Errors could mean. Media issue? Incorrect Setting? Not sure what I need to be looking at being I have little time on the ASR's at this point. Thanks.          


Regards, Mark
Danilo Dy

Can you post the "sh int tengige1 x/y/z" output for us to see more info?

Troubleshooting Ethernet

Here you are:

RP/0/RSP1/CPU0:rx-cssclabqa-b217-3-core#sh int tenGigE 0/0/0/30

Thu Jan 23 09:45:23.702 CST

TenGigE0/0/0/30 is up, line protocol is up

  Interface state transitions: 5

  Hardware is TenGigE, address is 8478.ac2b.8ce6 (bia 8478.ac2b.8ce6)

  Layer 1 Transport Mode is LAN

  Internet address is Unknown

  MTU 1514 bytes, BW 10000000 Kbit (Max: 10000000 Kbit)

     reliability 248/255, txload 0/255, rxload 0/255

  Encapsulation ARPA,

  Full-duplex, 10000Mb/s, link type is force-up

  output flow control is off, input flow control is off

  loopback not set,

  Last input 00:00:08, output never

  Last clearing of "show interface" counters 20:39:33

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

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

     1239 packets input, 341964 bytes, 0 total input drops

     0 drops for unrecognized upper-level protocol

     Received 0 broadcast packets, 1239 multicast packets

              0 runts, 0 giants, 0 throttles, 0 parity

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

     0 packets output, 0 bytes, 0 total output drops

     Output 0 broadcast packets, 0 multicast packets

     0 output errors, 0 underruns, 0 applique, 0 resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions


Regards, Mark

The interface RELIABILITY is also low.

The speed/duplex configuration of the interface in the local device is forced.

What is the configuration of the remote device interface?

Could be a duplex mismatch or bad cabling.

If i'm not mistaken, you cannot set negotiation to auto on a TenGigE interface on an ASR9K, or any 10G interface in any device for that matter.

Im having the same issue, but also showing CRCs. Already replaced the cabling.