On MPC7E/8E/9E Ethernet FEC Mode/Ethernet FEC statistics information is added in 'show interfaces' CLI from Junos 17.2R1 and higher.
Although FEC mode is configurable, this is not supported in CLI in Junos 16.1/16.2/17.1. By default, RS-FEC (Reed-Solomon Forward Error Correction) is enabled for 100G SR4 optics and disabled for 100G LR4 optics.
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.
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
--- JUNOS
17.1R3.6 Kernel 64-bit JNPR-10.3-20190306.8b08cc0_buil
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