Forward error correction (FEC) is an error correction technique to detect and correct a limited number of errors in transmitted data without the need for retransmission.
In this method, the sender sends a redundant error-correcting code along with the data frame. The receiver performs necessary checks based on the additional redundant bits. If it finds that the data is free from errors, it executes the error-correcting code that generates the actual frame. It then removes the redundant bits before passing the message to the upper layers.
You can verify the configuration by using the command(s) below:
pbnoscli# show interface summary
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Interface Lanes Speed MTU FEC Alias Vlan Oper Admin Type Asym PFC
============================================================================================================================
Ethernet1/1 0,1,2,3 100G 9100 rs etp1 trunk up up QSFP28 or later N/A
Ethernet2/1 8,9,10,11 100G 9100 none etp2 trunk up up QSFP28 or later N/A
Ethernet3/1 16,17,18,19 100G 9100 none etp3 trunk up up QSFP28 or later N/A
Ethernet4/1 24,25,26,27 100G 9100 rs etp4 trunk down up N/A N/A
Ethernet5/1 32,33,34,35 100G 9100 none etp5 trunk down up QSFP28 or later N/A
Ethernet6/1 40,41,42,43 100G 9100 none etp6 trunk down up QSFP28 or later N/A
Ethernet7/1 48,49,50,51 100G 9100 none etp7 trunk down up QSFP28 or later N/A
Ethernet8/1 56,57,58,59 100G 9100 none etp8 trunk down up N/A N/A
Ethernet9/1 64,65,66,67 100G 9100 none etp9 trunk down up N/A N/A
Ethernet10/1 72,73,74,75 100G 9100 none etp10 trunk down up N/A N/A
Ethernet11/1 80,81,82,83 100G 9100 none etp11 trunk down up N/A N/A
Ethernet12/1 88,89,90,91 100G 9100 none etp12 trunk down up N/A N/A
Ethernet13/1 96,97,98,99 100G 9100 none etp13 trunk up up QSFP28 or later N/A
Ethernet14/1 104,105,106,107 100G 9100 none etp14 trunk up up QSFP28 or later N/A
<...>
Ethernet60/1 472,473,474,475 100G 9100 none etp60 trunk down up N/A N/A
Ethernet61/1 480,481,482,483 100G 9100 none etp61 trunk down up N/A N/A
Ethernet62/1 488,489,490,491 100G 9100 none etp62 trunk down up N/A N/A
Ethernet63/1 496,497,498,499 100G 9100 rs etp63 routed up up QSFP28 or later N/A
Ethernet64/1 504,505,506,507 100G 9100 rs etp64 routed up up QSFP28 or later N/A
pbnoscli#
