Users Guide

Dell(conf-if-hu-1/1)#no fec enable
Disable autoneg before enabling/disabling FEC on 100G port
Dell(conf-if-hu-1/1)#no intf-type cr4 autoneg
Dell(conf-if-hu-1/1)#show config
!
interface hundredGigE 1/1
no ip address
shutdown
no intf-type cr4 autoneg
Dell(conf-if-hu-1/1)#fec enable
Dell(conf-if-hu-1/1)#show config
!
interface hundredGigE 1/1
no ip address
shutdown
no intf-type cr4 autoneg
fec enable
Dell(conf-if-hu-1/1)#no fec enable
Dell(conf-if-hu-1/1)#show config
!
interface hundredGigE 1/1
no ip address
shutdown
no intf-type cr4 autoneg
no fec enable
Dell(conf-if-hu-1/1)#fec default
Dell(conf-if-hu-1/1)#show config
!
interface hundredGigE 1/1
no ip address
shutdown
no intf-type cr4 autoneg
Dell(conf-if-hu-1/1)#
Important Points to Remember
• For 10–Gigabit and 40–Gigabit Ethernet interfaces, FEC congurations are not applicable.
• For 100-Gigabit Ethernet interfaces, CR4 auto-negotiation is enabled by default. You cannot enable or disable FEC separately. To enable
or disable FEC, disable CR4 auto-negotiation rst. Similarly, CR4 auto-negotiation cannot be enabled if FEC is already enabled or
disabled. To enable CR4 auto-negotiation, set to default FEC value using the fec default command.
• For 25–Gigabit and 50–Gigabit Ethernet interfaces, FEC is disabled by default. You can enable or disable FEC and CR4 auto-
negotiation simultaneously.
• To view CR4 auto-negotiation and FEC congurations for 25–Gigabit, 50–Gigabit and 100–Gigabit Ethernet interfaces, use the show
interfaces
command.
Dell#show interfaces hundredGigE 1/3
hundredGigE 1/3 is up, line protocol is up
Hardware is DellEth, address is 4c:76:25:e5:fb:40
Current address is 4c:76:25:e5:fb:40
Pluggable media present, QSFP28 type is 100GBASE-SR4
AutoNegotiation is OFF
Forward Error Correction(FEC) is ON
Wavelength is 850nm
QSFP28 receive power reading is -0.1950dBm
Interface index is 2098189
Internet address is not set
Mode of IPv4 Address Assignment : NONE
DHCP Client-ID :4c7625e5fb40
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed 100000 Mbit
Flowcontrol rx off tx off
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 03:02:45
Queueing strategy: fifo
Input Statistics:
356 packets, 22784 bytes
356 64-byte pkts, 0 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
356 Multicasts, 0 Broadcasts, 0 Unicasts
368
Interfaces