DHCPv6 Server Configuration

Unit: 6 Lesson: 2

i need a post office to specifically handle foreign mail

IPv6 has an address autoconfiguration protocol that handles finding the default gateway along with a proper network prefix. In this case, the role of the Dynamic-Host-Configuration-Protocol server is different. While the leasing process is the same, DHCPv6 is usually used for configuring extra options, rather than leasing.

Since IPv6 doesn't support broadcasting, clients use the multicast address ff02::1:2 to discover a DHCP server on the network. DHCPv6 uses ports 546 and 547 rather than 68 and 67 (six-seven!)

In slateless mode, clients obtain a network prefix from a router advertisement, and use it with an appropriate interface ID. The router can also set flags to tell the client that a DHCP server is available. If it is, the client can reach out to the DHCPv6 and get some extra information, including:

available DNS servers
extra SIP settings
SNTP settings
domain settings

In slateful mode, clients can also obtain a routable IPv6 address from the DHCPv6 scope, along with all the other information.

Static reservations are done differently in slateful mode on DHCPv6. Instead of using the device's MAC address to create the reservation, each reserved host creates a DHCP Unique Identifier (DUID) and an Identity Association Identifier (IAID) for each interface.

~~#Netplus~~