Dhcpv6; Dhcpv6 Client - D-Link NetDefendOS User Manual

5.6. DHCPv6

NetDefendOS supports DHCPv6, the equivalent of IPv4 DHCP for IPv6. This is described in the two
sections that follow:
• Section 5.6.1, "DHCPv6 Client"
• Section 5.6.2, "DHCPv6 Server"

5.6.1. DHCPv6 Client

Overview
Any interface can be configured to be a DHCPv6 client. This means that whenever NetDefendOS
restarts or when the DHCPv6 enabled configuration is saved and activated, the interface will
automatically try to retrieve an IPv6 lease from a connected DHCPv6 server. Only the following
interface types support the DHCPv6 client function:
• Ethernet interfaces.
• VLAN interfaces.
• Link Aggregation interfaces.
This section will use the generic term interface to mean any of the above types.
Addresses Received in a Server Lease
The lease received from a DHCPv6 server will contain the following:
• An IPv6 address for the interface.
• The addresses of up to three IPv6 DNS servers. NetDefendOS will only read the first two. The
third will be discarded.
As explained later in the section, the IPv6 network address and IPv6 gateway address can also be
automatically retrieved if the interface property Router Discovery is enabled.
Address Book Objects Created
The following is a list of the IPv6 address book objects that will be created when the DHCP client
is enabled on, for example, the if1 interface:
• if1_ip6 - The interface address.
• if1_dns6_1 - The first IPv6 DNS address in the DHCP lease.
Important: DHCPv6 clients are not supported in HA clusters
The DHCPv6 client is not supported for interfaces in a NetDefendOS high availability
cluster. If it is enabled for an interface, this will result in an error message when trying to
commit the configuration.
411
Chapter 5: DHCP Services