Example of the intf-type cr4 autoneg CommandDell(conf)#interface hundredGigE 1/1/1Dell(conf-if-hu-1/1/1)#intf-type cr4 autonegDell(conf-if-hu-1/1/1)#no intf-type cr4 autonegDell(conf-if-hu-1/1/1)#show config!interface hundredGigE 1/1/1no ip addressshutdownno intf-type cr4 autonegImportant Points to Remember• For 10–Gigabit Ethernet interfaces, CR4 auto-negotiation is not applicable.• For 100-Gigabit Ethernet interfaces, CR4 auto-negotiation is enabled by default.• For 40–Gigbit, 25–Gigabit and 50–Gigabit Ethernet interfaces, CR4 auto-negotiation is disabled by default.FEC ConfigurationFEC configurations are available on 100–Gigbit, 50–Gigabit and 25–Gigabit Ethernet interfaces.To configure FEC, use the following commands.• Enable FEC.INTERFACE modefec enableTo disable FEC, use the no fec enable command.• Set to default FEC value.INTERFACE modefec default• Verify the configuration.INTERFACE modeshow configExample of the fec enable CommandDell(conf-if-hu-1/1/1)#fec enableDisable autoneg before enabling/disabling FEC on 100G portDell(conf-if-hu-1/1/1)#no fec enableDisable autoneg before enabling/disabling FEC on 100G portDell(conf-if-hu-1/1/1)#no intf-type cr4 autonegDell(conf-if-hu-1/1/1)#show config!interface hundredGigE 1/1/1no ip addressshutdownno intf-type cr4 autonegDell(conf-if-hu-1/1/1)#fec enableDell(conf-if-hu-1/1/1)#show config!interface hundredGigE 1/1/1no ip addressshutdownno intf-type cr4 autonegfec enableDell(conf-if-hu-1/1/1)#no fec enableDell(conf-if-hu-1/1/1)#show config!Interfaces 403
