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Chapter 51 DHCP
XMG1915 Series User’s Guide
301
Figure 214 DHCP Relay for Two VLANs
For the example network, add two entries in DHCP Relay VLAN Setting section of the NETWORKING >
DHCP > DHCPv4 Relay > DHCP Relay VLAN Setting screen as shown.
Figure 215 DHCP Relay for Two VLANs Configuration Example
51.7 DHCPv6 Relay
A DHCPv6 relay agent is on the same network as the DHCPv6 clients and helps forward messages
between the DHCPv6 server and clients. When a client cannot use its link-local address and a well-
known multicast address to locate a DHCPv6 server on its network, it then needs a DHCPv6 relay agent
to send a message to a DHCPv6 server that is not attached to the same network.
The DHCPv6 relay agent can add the remote identification (remote-ID) option and the interface-ID
option to the Relay-Forward DHCPv6 messages. The remote-ID option carries a user-defined string, such
as the system name. The interface-ID option provides slot number, port information and the VLAN ID to
the DHCPv6 server. The remote-ID option (if any) is stripped from the Relay-Reply messages before the
VLAN 1
VLAN 2
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