My customer have a cisco 3640 with a high CPU . IOS : 12.1.5T
He has the following configuration :
"interface FastEthernet0/0.25
encapsulation dot1Q 25
ip address 192.168.20.241 255.255.255.248
shutdown
!
interface FastEthernet0/0.26
encapsulation dot1Q 26
ip address 192.168.14.1 255.255.255.0
!
interface FastEthernet0/0.27
encapsulation dot1Q 27
ip address 192.168.16.1 255.255.255.0
!
interface FastEthernet0/0.28
encapsulation dot1Q 28
ip address 192.168.20.249 255.255.255.248
shutdown
!
interface FastEthernet0/1
ip address 10.17.88.6 255.255.255.0
speed 100
full-duplex
no cdp enable
!"
Fastswitching is enabled by default .
Fastswitching is applied in sub-interfaces ???
Can I configure CEF over sub-interfaces .
