Which two features do CoPP and CPPr use to protect the control plane? (Choose two)
A.
QoS
B.
traffic classification
C.
access lists
D.
policy maps
E.
class maps
F.
Cisco Express Forwarding
Which two features do CoPP and CPPr use to protect the …
Which two features do CoPP and CPPr use to protect the control plane? (Choose two)
This should be either A and F
Correct:
A: QOS is definitely right.
“The Control-plane Policing feature allows Quality of Service (QoS) policing of aggregate control-plane traffic destined to the route processor. ”
F: “Requires CEF Control Plane- Protection depends on Cisco Express Forwarding (CEF) for IP packet redirection.”
Incorrect:
B,D,E: Traffic classification, Class maps are the same answer and fall under the same reason as to why policy map is incorrect. They are ways to implement the protective features- However are not a protective feature themselves. Classifying a policy and traffic that the policy applies to does nothing without a functional component to utilize the policy to control the traffic that has been classified. Without CEF and QOS there is no corrective component to take action.
It would be like Making a law and a process for punishment for breaking that law- but then not hiring/training police to enforce it.
C: ACLs are not compatible with Control Plane Protection.
“No Support for Direct ACL Configuration
The current release of Control Plane Protection does not support direct access control list (ACL) configuration in the control-plane subinterfaces, but rather can be configured using Modular QoS CLI (MQC) policies.”
Ref for all answers taken from this page: https://www.cisco.com/c/en/us/td/docs/ios/12_4t/12_4t4/htcpp.html
I agree