+------+                                      edge
|config|    initial, "CLI"                   interfaces
|server| ----------------> +-------------+
+------+                   | edge router/|-+  -----  +-----+
   |     .... domain ...   | DHCP relay  | |  ...    | CPE |+  LANs
+------+                   +-------------+ |  -----  +-----+| (---| )
|DHCP  |                    +--------------+  DHCP/   +-----+
|server|                                     DHCPv6-PD
+------+