CoPP
Control Plane Policing (CoPP) allows QoS to be applied to the router’s
control plane to avoid overrunning the router’s CPU. The control plane
consists of high-level processes that run on the route processor, and handles
management tasks, such as traffic bound to or from the router or switch
itself.
CoPP uses the MQC to control the traffic bound to and from the router or
switch’s control plane. Two policy options are available—police or drop. To
configure CoPP, take the following steps:
Step 1. Configure a class map that identifies traffic to be policed.
Step 2. Configure a policy map that either polices the traffic permitted by
the class map or drops it.
Step 3. Enter control plane configuration mode using the global controlplane
command.
Step 4. Apply the service policy to the control plane.
During a DoS attack, or times of heavy processor use, CoPP can ensure
that the network device remains available and critical network traffic can
be processed.
CCNP