Hi all

When you apply CoPP for output traffic, it applies to all traffic coming out
from the CP. The highlighted statement is not clear to me. Does it mean that
the error messages are not sent for the return CP traffic for those two
mentioned ingress CP traffic.

Snippet from
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/ctrl_plane_policng_external_docbase_0900e4b1805eee4d_4container_external_docbase_0900e4b180dd87e0.html

Output Rate-Limiting and Silent Mode Operation

A router is automatically enabled to silently discard packets when you
configure output policing on control plane traffic using the *service-policy
output **policy-map-name* command.

Rate-limiting (policing) of output traffic from the CP is performed in
silent mode. In silent mode, a router that is running Cisco IOS software
operates without sending any system messages. If a packet that is exiting
the control plane is discarded for output policing, you do not receive an
error message.

When control plane policing is configured for output traffic, error messages
are not generated in the following cases:

•Traffic that is being transmitted to a port to which the router is not
listening

•A connection to a legitimate address and port that is rejected because of a
malformed request



With regards

Kings
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