Cef vs fast switching

Hi @Network_Eric
@[carlgersbach56]​ @[clintjonesrb26]​

R1#show running-config interface fastEthernet 0/0
interface FastEthernet0/0
ip address 10.1.18.1 255.255.255.0
ip ospf cost 10
duplex auto
speed auto
end

R1#show ip interface fastEthernet 0/0
FastEthernet0/0 is up, line protocol is up
Internet address is 10.1.18.1/24
Broadcast address is 255.255.255.255
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP CEF switching is enabled
IP route-cache flags are Fast, CEF

when the exact same interface has BOTH

IP fast switching is enabled

AND

IP CEF switching is enabled

which means the interface is doing BOTH fast switching AND cef switching both at the exact same time?

how?

also, the command

int f0/0

ip route-cache

this command is used in order to enable the fast switching mode .

int f0/0

ip route-cache cef

this command is used in order to enable the cef switching mode .

but how could we have both modes enabled ?