Appendix C - NetX Duo DHCPv6 unique identifiers (DUIDs)
| DUID Type | Code | Description |
|---|---|---|
| DUID-LLT | 1 | Link layer plus time; identifier based on link layer address and time |
| DUID-EN | 2 | Enterprise; Assigned by Vendor Based on Enterprise Number |
| DUID-LL | 3 | Link layer; Based on Link-layer Address only |