Service Manual

example for the fec enable command for a 100G interface.
DellEMC(conf-if-hu-1/1/1)#fec enable
DellEMC(conf-if-hu-1/1/1)#show config
!
interface hundredGigE 1/1/1
no ip address
shutdown
intf-type cr4 autoneg
fec enable
Important Points to Remember
● For 10–Gigabit and 40–Gigabit Ethernet interfaces, FEC configurations are not applicable.
● For 100-Gigabit Ethernet interfaces, CR4 auto-negotiation is enabled by default. You can enable or disable FEC and auto
negotiation irrespective of each other.
● 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 configurations for 100–Gigabit Ethernet interfaces, use the show interfaces
command.
● For 25–Gigabit and 50–Gigabit Ethernet interfaces, There is no support for CL73-AN (auto negotiation), CL72-LT (link
training), and CL74-FEC (BaseR-FEC or firecode-FEC).
DellEMC#show interfaces hundredGigE 1/1/1
hundredGigE 1/1/1 is up, line protocol is up
Hardware is DellEMCEth, address is 00:12:32:12:42:13
Current address is 00:12:32:12:42:13
Pluggable media present, QSFP28 type is 100GBASE-CR4-3M
AutoNegotiation is OFF
Forward Error Correction(FEC) is ON
Wavelength is 64nm
Interface index is 2101774
Internet address is not set
Mode of IPv4 Address Assignment : NONE
DHCP Client-ID :001232124213
MTU 9416 bytes, IP MTU 9398 bytes
LineSpeed 100000 Mbit
Flowcontrol rx off tx off
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 00:31:23
Queueing strategy: fifo
Input Statistics:
32992398774 packets, 2243483116632 bytes
0 64-byte pkts, 32992398774 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
0 Multicasts, 0 Broadcasts, 32992398774 Unicasts
0 runts, 0 giants, 0 throttles
0 CRC, 0 overrun, 0 discarded
669 FEC bit errors, 172 FEC uncorrected code words
Output Statistics:
0 packets, 0 bytes, 0 underruns
0 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
0 Multicasts, 0 Broadcasts, 0 Unicasts
0 throttles, 0 discarded, 0 collisions, 0 wreddrops
Rate info (interval 299 seconds):
Input 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Output 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Time since last interface status change: 00:27:30
Setting the Speed of Ethernet Interfaces
To discover whether the remote and local interface requires manual speed synchronization, and to manually synchronize them if
necessary, use the following command sequence.
1. Determine the local interface status. Refer to the following example.
EXEC Privilege mode
Interfaces
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