Cisco ASR 920 series - Input Rate-Limiting and Silent Mode Operation; How to Use Control Plane Policing; Defining Control Plane Services

Input Rate-Limiting and Silent Mode Operation
A router is automatically enabled to silently discard packets when you configure input policing on control
plane traffic using the service-policy input policy-map-name command.
Rate-limiting (policing) of input traffic from the control plane is performed in silent mode. In silent mode, a
router that is running Cisco IOS XE software operates without receiving any system messages. If a packet
that is entering the control plane is discarded for input policing, you do not receive an error message.
How to Use Control Plane Policing
Defining Control Plane Services
Perform this task to define control plane services, such as packet rate control and silent packet discard for the
RP.
Before You Begin
Before you enter control-plane configuration mode to attach an existing QoS policy to the control plane, you
must first create the policy using MQC to define a class map and policy map for control plane traffic.
Note
•
Platform-specific restrictions, if any, are checked when the service policy is applied to the control
plane interface.
•
Input policing does not provide any performance benefits. It simply controls the information that is
entering the device.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
control-plane
4.
service-policy inputpolicy-map-name
5.
end
DETAILED STEPS
PurposeCommand or Action
Enables privileged EXEC mode.enable
Step 1
Example:
Device> enable
•
Enter your password if prompted.
QoS: Policing and Shaping Configuration Guide (Cisco ASR 920 Series)
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Control Plane Policing
Input Rate-Limiting and Silent Mode Operation