3.1.4.1 Creating and Transmitting a DHCPDISCOVER Message

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Whenever a DHCP client sends a DHCPDISCOVER message, the DHCP client implementing this specification MUST indicate its capability to the DHCP server by sending the SoH vendor-specific option with length equal to zero. It MUST also include a NAP-CoID option (section 2.2.1.3) in this message. The NAP-SoH (section 2.2.1.1) option and NAP-CoID (section 2.2.1.3) option are appended to the DHCPDISCOVER message packet by calling DhcpAppendVendorSpecificOption ([MS-DHCPE] section 3.1.7.1).

 In addition, it MUST set its NAP-Capable Server state to "Unknown".