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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Change of Authorization (CoA) packets

Using the CoA packets, the NAS can handle authorization of dot1x sessions by processing the following requests from the Dynamic Authorization Client (DAC): Re-authentication of the supplicant, Port disable, and Port bounce.

The CoA packets constitute one message request (CoA request) and one of the following two possible responses:

  • Change of Authorization Acknowledgement (CoA-Ack) - If the authorization state change is successful, then NAS sends a CoA-Ack.
  • Change of Authorization non-Acknowledgement (CoA-Nak) - If the authorization state change is not successful, then the NAS sends a CoA-Nak, which is a negative acknowledgement.

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