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DES-7200 Configuration Guide Chapter 9 DHCPv6 Relay Agent Configuration
9-3
9.1.3 Understanding
DHCP Relay Agent
9.1.3.1 DUID
The RFC3315 defines the DUID(DHCP Unique Identifier) is the unique identifier
to idetify the DHCPv6 device(including the Client, the Relay and the Server) in
the network, used for the DHCPv6 device verification. DES-7200 product
adopts the DUID-LL(DUID Based on Link-layer Address) specified in the RFC
3315 as the identification of the DHCPv6 device. The following explains the
DUID-LL structure:
z DUID type: DUID-LL type value is 0x0003.
z Hardware type: the supported hardware type is Ethernet, 0x0001.
z Link layer address: the bridge MAC address for the device.
9.1.4 DHCPv6 Relay Agent
Working Principle
The DHCPv6 Relay Agent encapsulates the DHCPv6 packets sent from the
Client into the Relay-forward packets and then forwards those packets to the
specified servers. Upon receiving the Relay-forward packets, the DHCPv6
server sends the Relay-reply packets. The DHCPv6 Relay Agent decapsulates
the Relay-reply packets and forwards them to the Client.
Figure-3 DHCPv6 Relay Working Process