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Internal Error on 6120 Ethernet Interface

Anyone else out there seen these errors? When these happen the ESX host vmnic drops off the network. Interface Ethernet1/5 is a server port on one of the 6120s going to a FEX port on a chassis.

%ETHPORT-2-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/5 is down (Error disabled. Reason:Internal Error)

Whe we issue a show interface ethernet 1/5 this is the output, notice the high CRCs.

(nxos)# show interface ethernet 1/5

Ethernet1/5 is up

  Hardware: 1000/10000 Ethernet, address: 0005.9b71.958c (bia 0005.9b71.958c)

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

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

  Encapsulation ARPA

  Port mode is fex-fabric

  full-duplex, 10 Gb/s, media type is 10g

  Beacon is turned off

  Input flow-control is off, output flow-control is off

  Rate mode is dedicated

  Switchport monitor is off

  Last link flapped 03:16:06

  Last clearing of "show interface" counters never

  1 minute input rate 107752 bits/sec, 9 packets/sec

  1 minute output rate 41984 bits/sec, 19 packets/sec


    26907942831 input packets 26905329393 unicast packets 1992441 multicast packets

    619564 broadcast packets 13228311244 jumbo packets 0 storm suppression packets

    23417018867819 bytes


    31519925400 output packets 25995525 multicast packets

    39661395 broadcast packets 18464811366 jumbo packets

    30153010864970 bytes

    0 input error 0 short frame 0 watchdog

    0 no buffer 0 runt 1428 CRC 0 ecc

    0 overrun  0 underrun 0 ignored 0 bad etype drop

    0 bad proto drop 0 if down drop 0 input with dribble

    0 input discard

    0 output error 0 collision 0 deferred

    0 late collision 0 lost carrier 0 no carrier

    0 babble

    0 Rx pause 12976701 Tx pause

  4 interface resets

New Member

Re: Internal Error on 6120 Ethernet Interface

Hi Jeremy,

Have you tried swapping the cable/sfp? See if that results in any improvement and if so, see if the problem follows the cable when used in a different port.

Re: Internal Error on 6120 Ethernet Interface

It turned out being a bad cable.