DHCP in layer-3 overlay with anycast address support and network address transparency

A method comprising:

• receiving, by a border device, a processed network configuration parameter response having an address of a subnet to which a client device is associated and information data in an information field of the network configuration parameter response, the information data comprising an address of a network device and an identifier of the subnet to which the client device is associated;
• encapsulating, by the border device, the processed network configuration parameter response with information data extracted from the processed network configuration parameter response, wherein encapsulating the processed network configuration parameter response comprises,
• extracting the information data comprising a Source-Switch-IP address and a Virtual Network Identifier (VNI) from a Dynamic Host Configuration Protocol (DHCP) option 82 field of the processed network configuration parameter response, and
• creating a Virtual Extensible Local Area Network (VXLAN) header for the encapsulated network configuration parameter response using the Source-Switch-IP address and the VNI extracted from the DHCP option 82 field of the processed network configuration parameter response;
• and
• forwarding, by the border device to the network device, the encapsulated network configuration parameter response encapsulated with the created VXLAN header.

An apparatus comprising:

• a memory storage;
• and
• a processing unit coupled to the memory storage, wherein the processing unit is operative to:
• receive a processed network configuration parameter response having an address of a subnet to which a client device is associated and information data in an information field of the network configuration parameter response, the information data comprising an address of a network device and an identifier of the subnet to which the client device is associated;
• encapsulate the processed network configuration parameter response with information data extracted from the processed network configuration parameter response, wherein the processing unit being operative to encapsulate the processed network configuration parameter response comprises the processing unit being operative to,
• extract the information data comprising a Source-Switch-IP address and a Virtual Network Identifier (VNI) from a Dynamic Host Configuration Protocol (DHCP) option 82 field of the processed network configuration parameter response, and
• create a Virtual Extensible Local Area Network (VXLAN) header for the encapsulated network configuration parameter response using the Source-Switch-IP address and the VNI extracted from the DHCP option 82 field of the processed network configuration parameter response;
• and
• forward, to the network device, the encapsulated network configuration parameter response encapsulated with the created VXLAN header.