DUID
A DHCP unique identifier (DUID) uniquely identifies a DHCPv6 device (DHCPv6 client, server, or relay agent). A DHCPv6 device adds its DUID in a sent packet.
The DUID falls into many types. The device supports only the DUID based on link-layer address (DUID-LL) defined in RFC 3315.
Figure 59 shows the DUID-LL format, where:
DUID type—The device supports the DUID type of DUID-LL with the value of 0x0003.
Hardware type—The device supports the hardware type of Ethernet with the value of 0x0001.
Link layer address—Takes the value of the bridge MAC address of the device.
Figure 59: DUID-LL format
