Specifications

IP Switching Commands
show cef interface
ISW-125
Cisco IOS IP Switching Command Reference
May 2008
Slot 1 Slot unit 0 VC -1
Transmit limit accumulator 0xE8001A82 (0xE8001A82)
IP MTU 1500
The following is sample output from the show cef interface detail command for Ethernet
interface
1/0/0:
Router# show cef interface ethernet 1/0/0 detail
FastEthernet1/0/0 is up (if_number 6)
Corresponding hwidb fast_if_number 6
Corresponding hwidb firstsw->if_number 6
Internet address is 10.1.1.1/24
ICMP redirects are always sent
Per packet load-sharing is disabled
IP unicast RPF check is disabled
Inbound access list is not set
Outbound access list is not set
IP policy routing is disabled
BGP based policy accounting on input is enabled
BGP based policy accounting on output is disabled
Hardware idb is FastEthernet1/0/0 (6)
Software idb is FastEthernet1/0/0 (6)
Fast switching type 1, interface type 18
IP Distributed CEF switching enabled
IP Feature Fast switching turbo vector
IP Feature CEF switching turbo vector
Input fast flags 0x100, Output fast flags 0x0, Flags 0x0
ifindex 7(7)
Slot 1 Slot unit 0 VC -1
Transmit limit accumulator 0xE8001A82 (0xE8001A82)
IP MTU 1500
The following is sample output from the show cef interface Null 0 detail command:
Router# show cef interface null 0 detail
Null0 is up (if_number 1)
Corresponding hwidb fast_if_number 1
Corresponding hwidb firstsw->if_number 1
Internet Protocol processing disabled
Interface is marked as nullidb
Packets switched to this interface on linecard are dropped to next slow path
Hardware idb is Null0
Fast switching type 13, interface type 0
IP CEF switching enabled
IP Feature CEF switching turbo vector
Input fast flags 0x0, Output fast flags 0x0
ifindex 0(0)
Slot -1 Slot unit -1 VC -1
Transmit limit accumulator 0x0 (0x0)
IP MTU 1500
The following is sample output for internal Cisco Express Forwarding interface status and configuration
for the Ethernet 3/1 interface:
Router# show cef interface ethernet 3/1 internal
Ethernet3/1 is up (if_number 13)
Corresponding hwidb fast_if_number 13
Corresponding hwidb firstsw->if_number 13
Internet address is 10.0.212.6/24
ICMP redirects are always sent
Per packet load-sharing is disabled