Restrictions for CoPP
Restrictions for control plane policing (CoPP) include the following:
Only ingress CoPP is supported. The system-cpp-policy policy-map is available on the control plane interface, and only in the ingress direction.
Only the system-cpp-policy policy-map can be installed on the control plane interface.
The system-cpp-policy policy-map and the seventeen system-defined classes cannot be modified or deleted.
Only the police action is allowed under the system-cpp-policy policy-map. The police rate for system-defined classes must be configured only in packets per second (pps); for user-defined class maps this must be configured only in bits per second (bps).
When setting the policer rate, note that a clock frequency limitation causes differences in the
default rateand the
set ratevalues displayed for some classes (even if you set the default rate for all classes). See the User-Configurable Aspects of CoPP and Example: Setting the Default Policer Rates for All CPU Queues topics in this chapter for more information.
Removing the policer rate configuration, disables CoPP on all affected queues.
The show run command does not display information about classes configured under
system-cpp policy, when they are left at default values. Use the show policy-map system-cpp-policy or the show policy-map control-plane commands instead.
You can continue use the show run command to display information about custom policies.