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DES-7200 Configuration Guide Chapter 7 DHCPv6 Server Configuration
7-3
1. DUID-LLT: DUID Based on Link-Layer address plus Time;
2. DUID-EN: DUID Assigned by Vendor Based on Enterprise Number；
3. DUID-LL: Link-Layer address, DUID-LL;
DES-7200 DHCPv6 devices currently adopt DUID-LL, the structure of which is
shown below:
The value of DUID type is 0x0003 (DUID-LL); the value of Hardware type is 0x0001
(Ethernet); the value of Link layer address will be the MAC address of device.
7.1.2.2 DHCPv6 address assignment
Different from DHCPv4, the DHCPv6 Server assigns an Identity Association (IA) to
the client instead of a single address, and each IA consists of the unique identifier of
IAID (Identity association identifier), which is generated by DHCPv6 Client and
associated with each IA. The IA and Client jointly establish the one-to-one
corresponding relationship. Each IA contains multiple addresses, and the Client may
assign the addresses of IA to other interfaces of the device. The addresses
contained in IA can be divided into the following three categories:
1. NA: Non-temporary Addresses, the unique address in the world;
2. TA: Temporary Addresses (no related applications);
3. PD: Prefix Delegation, prefix space;
Therefore, given the difference in the addresses of IA, IA can be divided into IA_NA,
IA_TA and IA_PD (IA-Type). DES-7200 DHCPv6 Server supports the assignment of
IA_NA and IA_PD (no support to IA_TA).
7.1.2.3 DHCPv6 bindings
DHCPv6 Bindings are a group of manageable address information structures based
on Identity Association (IA) and can be identified by both Server and Client. The
binding data on Server will record the IA assigned to each Client and other