I am stepping through some base hardening on an ISR4451-X and I would like to use Control Plan Protection, however, when I issue the commands the host subinterface is all I get. There is no cef-exception or transit subinterface. Additionally, when I do try to apply a policy map to the host subint I don't even get the option to do so. It is looking for a management interface assignment. The specs said the hardware support CPPr but are there caveats to when this would even apply?
ROUTER(config)#control-plane host ?
Control Plane host configuration commands:
exit Exit from control-plane host configuration mode
management-interface Configure interface for receiving network management
no Negate or set default values of a command
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