Information Technology Reference
In-Depth Information
The portion of CPU cycles used to switch the packets at the interrupt level is shown in
show
process cpu
. Some sample command outputs are provided in the following examples.
Example 2-9 shows what switching paths are enabled at an interface level. In this example,
both Fast Switching and CEF are enabled.
Example of
show ip
interface
Example 2-9
router#show ip interface FastEthernet 0/0
...
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is enabled
IP Fast switching turbo vector
IP CEF switching with tag imposition turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
...
Example 2-10 shows per-interface CEF status. In this example, CEF is enabled, and per-
packet load sharing is not enabled.
Example 2-10
Example of
show cef
interface
router#show cef interface FastEthernet 0/0
FastEthernet0/0 is up (if_number 2)
Internet address is 10.0.4.1/24
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
Hardware idb is FastEthernet0/0
Fast switching type 1, interface type 18
IP CEF switching enabled
IP Fast switching turbo vector
IP CEF switching with tag imposition turbo vector
Input fast flags 0x0, Output fast flags 0x0
ifindex 1(1)
Slot 0 Slot unit 0 VC -1
Transmit limit accumulator 0x0 (0x0)
IP MTU 1500
Example 2-11 shows the interface switching statistics. In this example, all the packets are
process-switched.
