Errors description in NPM

Question

Hello,

Currently in NPM, on interfaces details we are able to see input/output errors or discards. What is the meaning of those values (CRC, frame, overrun, ignored...)? On the switch we are able to see :

174316960 packets input, 719586449 bytes, 9170041 no buffer
     Received 173407095 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 9170041 ignored
     0 watchdog, 162541217 multicast, 0 pause input
     0 input packets with dribble condition detected
     1020076 packets output, 109444133 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 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

Is there a way to see only CRC errors on interfaces ?

Many thanks.

Eric.

elejeune · Answer

Hello,

So the value seen in the Web page as Received Errors or Transmit errors is the sum of all errors (CRCs, overrun, frames and buffer misses) right ?

The only way to see CRCs errors is to declare an Universal poller and to assign to all interfaces ?

Many thanks for your answers..

Eric.

mcbridea · Answer

Do you mean that you would only want to see CRC errors in the NPM web? If so, here is a CRC error UnDP. From the information you have provided you are dropping inbound packets due to buffer failures. Buffer misses are normal and just mean that a packet had to be handeled by a secondary buffer, but failures = drops. You can use show buffers to see which pools are dropping and allocate more space in them.