On MPC7E/8E/9E Ethernet FEC Mode/Ethernet FEC statistics information is added in 'show interfaces' CLI from Junos 17.2R1 and higher.
'show interfaces'
The 'set interfaces xx gigether-options fec' knob is introduced in Junos 16.1R1. It can be used to override the default behavior and explicitly enable/disable FEC on an interface.
'set interfaces xx gigether-options fec'
Although FEC mode (fe74/fec91/none) is configurable, ethernet FEC Mode/Ethernet FEC statistics information is not supported in CLI in Junos 16.1/16.2/17.1
User@MX2020> show chassis hardware |no-more Hardware inventory: Item Version Part number Serial number Description Chassis JN1229D75AFJ MX2020 Midplane REV 51 750-040240 ABAC3570 Lower Backplane Midplane 1 REV 05 711-032386 ABAC4500 Upper Backplane PMP 1 REV 05 711-032428 ACAJ4350 Upper Power Midplane PMP 0 REV 04 711-032426 ACAJ3169 Lower Power Midplane FPM Board REV 13 760-040242 ABCW2351 Front Panel Display -- snip -- FPC 8 REV 30 750-063414 CAJR2541 MPC9E 3D CPU REV 20 750-057177 CAJK3914 SMPC PMB MIC 0 REV 11 750-055992 CAFG4661 MRATE-12xQSFPP-XGE-XLGE-CGE PIC 0 BUILTIN BUILTIN MRATE-12xQSFPP-XGE-XLGE-CGE Xcvr 6 REV 01 740-058732 1GCQA4080SH QSFP-100GBASE-LR4 Xcvr 7 REV 01 740-058732 1GCQA4080H0 QSFP-100GBASE-LR4 Fan Tray 0 REV 06 760-046960 ACAY2021 172mm FanTray - 6 Fans Fan Tray 1 REV 06 760-046960 ACAY1698 172mm FanTray - 6 Fans Fan Tray 2 REV 06 760-046960 ACAY1816 172mm FanTray - 6 Fans Fan Tray 3 REV 06 760-046960 ACAY1944 172mm FanTray - 6 F User@MX2020> show configuration chassis fpc 8 { pic 0 { pic-mode 100G; } pic 1 { pic-mode 100G; } } network-services enhanced-ip; User@MX2020> show configuration interfaces et-8/0/6 { gigether-options { fec fec91; } } et-8/0/7 { gigether-options { fec fec91; } } User@MX2020> show interfaces et-8/0/6 media Physical interface: et-8/0/6, Enabled, Physical link is Up Interface index: 150, SNMP ifIndex: 821 Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 100Gbps, BPDU Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled Pad to minimum frame size: Disabled Device flags : Present Running Interface flags: SNMP-Traps Internal: 0x4000 Link flags : None CoS queues : 8 supported, 8 maximum usable queues Schedulers : 0 Current address: 64:64:9b:b0:6e:60, Hardware address: 64:64:9b:b0:6e:60 Last flapped : 2020-07-01 20:49:38 IST (00:01:30 ago) Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) Active alarms : None Active defects : None PCS statistics Seconds Bit errors 0 Errored blocks 0 MAC statistics: Input bytes: 0, Input packets: 0, Output bytes: 0, Output packets: 0 Filter statistics: Filtered packets: 0, Padded packets: 0, Output packet errors: 0 Interface transmit statistics: Disabled
Ethernet FEC Mode/Ethernet FEC statistics information is added in 'show interfaces' CLI from Junos 17.2R1 and higher. FEC mode is set to fec91: --- JUNOS 17.2R1.13 Kernel 64-bit JNPR-10.3-20170523.350481_build
User@MX2020> show configuration interfaces et-8/0/6 { gigether-options { fec fec91; } } et-8/0/7 { gigether-options { fec fec91; } } User@MX2020> show interfaces et-8/0/6 media Physical interface: et-8/0/6, Enabled, Physical link is Up Interface index: 150, SNMP ifIndex: 821 Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 100Gbps, BPDU Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled Pad to minimum frame size: Disabled Device flags : Present Running Interface flags: SNMP-Traps Internal: 0x4000 Link flags : None CoS queues : 8 supported, 8 maximum usable queues Schedulers : 0 Current address: 64:64:9b:b0:6e:60, Hardware address: 64:64:9b:b0:6e:60 Last flapped : 2020-07-02 06:35:32 IST (00:12:10 ago) Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) Active alarms : None Active defects : None PCS statistics Seconds Bit errors 0 Errored blocks 0 Ethernet FEC Mode : FEC91 Ethernet FEC statistics Errors FEC Corrected Errors 0 FEC Uncorrected Errors 0 FEC Corrected Errors Rate 0 FEC Uncorrected Errors Rate 0 MAC statistics: Input bytes: 0, Input packets: 0, Output bytes: 0, Output packets: 0 Filter statistics: Filtered packets: 0, Padded packets: 0, Output packet errors: 0 Interface transmit statistics: Disabled
FEC mode is deleted.
User@MX2020> show configuration interfaces
User@MX2020> show interfaces et-8/0/6 media Physical interface: et-8/0/6, Enabled, Physical link is Up Interface index: 150, SNMP ifIndex: 821 Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 100Gbps, BPDU Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled Pad to minimum frame size: Disabled Device flags : Present Running Interface flags: SNMP-Traps Internal: 0x4000 Link flags : None CoS queues : 8 supported, 8 maximum usable queues Schedulers : 0 Current address: 64:64:9b:b0:6e:60, Hardware address: 64:64:9b:b0:6e:60 Last flapped : 2020-07-02 06:48:16 IST (00:00:11 ago) Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) Active alarms : None Active defects : None PCS statistics Seconds Bit errors 0 Errored blocks 1 Ethernet FEC Mode : NONE Ethernet FEC statistics Errors FEC Corrected Errors 0 FEC Uncorrected Errors 3 FEC Corrected Errors Rate 0 FEC Uncorrected Errors Rate 0 MAC statistics: Input bytes: 0, Input packets: 0, Output bytes: 0, Output packets: 0 Filter statistics: Filtered packets: 0, Padded packets: 0, Output packet errors: 0 Interface transmit statistics: Disabled