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The control engine that is in standby mode is actually in a stateful-standby mode such that it keeps sync with all major management and control protocols that the active control engine maintains . A new interface called the " Control Plane interface " can have a rate limiting policy applied to it to limit the total amount of traffic destined to the Control Plane . The control plane will rebuild the FIB using route information from its peers from which the data plane can then start using to forward packets . The increasing need to protect internal devices and applications from attacks and unauthorized access attempts is directly reflected in these survey results . The key to this feature is the ability of the redundant Supervisor to de-couple the control and data plane during this failover . As the data load on the Data Center grows , so too the requirement for higher performance loads on these devices , which can be met by these modules . Environmental benefits come into play with virtualization avoiding the requirement to otherwise deploy multiple instances of the standalone appliance to meet the needs of multiple groups . The requirement to serve the Data Center environment mandates that a solid design methodology be used to build the network . This is achieved by separating the control path and data path of the I / O and distributing I / O mapping functions across all processors . This optimizes traffic prioritization and network availability without the challenge of a complex configuration . Pay for performance employment advertising is recruiting .