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Sunday, September 7, 2014

Cisco Nexus transceiver validation failed error

While trying to connect Nexus 2224TP to Nexus 56128 switch, using 10G-SFP-SR instead of 10G FET due to distance issue, I got transceiver validation failed error:

Ethernet1/30 is down (Transceiver validation failed)
 Dedicated Interface
  Hardware: 1000/10000 Ethernet, address: 002a.6ae1.d1a5 (bia 002a.6ae1.d1a5)
  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  Port mode is access
  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
  EtherType is 0x8100
  Last link flapped never
  Last clearing of "show interface" counters never
  0 interface resets
  30 seconds input rate 0 bits/sec, 0 packets/sec
  30 seconds output rate 0 bits/sec, 0 packets/sec
  Load-Interval #2: 5 minute (300 seconds)
    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
    0 unicast packets  0 multicast packets  0 broadcast packets
    0 input packets  0 bytes

To solve this error simply configure on the port mode fex-fabric:

interface ethernet1/30
switchport mode fex-fabric

1 comment:

  1. Thanks so much for posting this information. As it was working fine at 5k switch & it wasnt for another so I was assuming something wrong with the non working switch. Even support team was ready to replace the 5K switch but before I request for an RMA I got this informaiton & saved my lot of time :)