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On a Nexus 9000 the input error counter does not increase even though there are CRCs reported: switch # show int ethernet 2/3 | egrep Eth|RX|TX|err|jumb|CRC | egrep -v Hard|Type Ethernet2/3 is up RX 10 jumbo packets 0 storm suppression packets 0 runts 0 giants 10 CRC 0 no buffer <<<<------------------- RX CRC 0 input error 0 short frame 0 overrun 0 underrun 0 ignored <<<<--- No input error count increasing TX 0 jumbo packets 0 output error 0 collision 0 deferred 0 late collision Also, Rcv-Err remains at zero: switch # sh int eth 2/3 counters errors -------------------------------------------------------------------------------- Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards -------------------------------------------------------------------------------- Eth2/3 0 10 0 0 0 0 -------------------------------------------------------------------------------- Port Single-Col Multi-Col Late-Col Exces-Col Carri-Sen Runts -------------------------------------------------------------------------------- Eth2/3 0 0 0 0 0 0 -------------------------------------------------------------------------------- Port Giants SQETest-Err Deferred-Tx IntMacTx-Er IntMacRx-Er Symbol-Err -------------------------------------------------------------------------------- Eth2/3 0 -- 0 0 0 0 9396-VTEP-A-vPC#
CRCs coming into a 40G port
None
The 40G port is part of the Northstar asic from Cisco and the 10G ports are part of the T2 asic from broadcom.
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