Enabling dCEF
To enable dCEF operation, use the following command:
ip cef distributed
Disabling dCEF
To disable dCEF operation, use the following command:
no ip cef distributed
Warning Never disable dCEF on a Cisco 12000 series.
Disabling CEF on an Individual Interface
When you enable or disable CEF or dCEF in Global Configuration mode, all supported interfaces that support
CEF or dCEF are affected. Some features on interfaces do not support CEF, such as policy routing. In that
case, you will need to disable CEF on that interface.
To disable CEF on an interface, use the following command:
no ip route−cache cef
Configuring CEF Load Balancing
To enable per−packet load balancing, use the following command:
ip load−sharing per−packet
Disabling CEF Load Balancing
To disable per−packet sharing, use the following command:
no ip load−sharing per−packet
Enabling Network Accounting for CEF
To enable network accounting for CEF on the 8500 GSR to collect the numbers of packets and bytes
forwarded to a destination, use the following command:
ip cef accounting per−prefix
Setting Network Accounting for CEF to Collect Packet Numbers
To set network accounting for CEF to collect the numbers of packets express−forwarded through a
destination, use this command:
ip cef accounting non−recursive
Viewing Network Accounting for CEF Statistics
The information collected by network accounting for CEF is collected at the route processor. Distributed CEF
information is collected by the line cards, not the route processor.
To view the statistics collected, use the following command:
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