The 7210 SAS provides several rate limiting mechanisms to protect the CPM/CFM processing resources of the router:
Centralized CPU Protection: a centralized rate-limiting function that operates on the CPM to limit traffic destined to the CPUs. The CPU protection mechanism is not user-configurable. It is supported on all 7210 SAS platforms.
For historical reasons, the term ‟centralized CPU protection” is called ‟CPU protection” in this user guide.
Distributed CPU Protection (DCP): a control traffic rate-limiting protection mechanism for the CPM and CFM that operates on line cards. See DCP for more information about the DCP mechanism.