Samsung Ubigate iBG3026, Configuration Manual

Page: 127 / 718

Ubigate iBG3026 Configuration Guide
© SAMSUNG Electronics Co., Ltd.
89
CHAPTER 11. DHCP Relay
Ubigate iBG3026 Modular Router’s DHCP relay feature eliminates the need
for a DHCP server on every LAN, because DHCP requests can be relayed to a
single remote DHCP server. The relay agent forwards traffic between clients
and servers when they are located on different subnets. When the relay agent
receives a DHCP message, it generates a new DHCP and sends it out on
another interface. This differs from normal IP forwarding on routers wherein
traffic is switched between networks.
Ubigate iBG3026 Modular Router’s implementation of DHCP relay is based
on RFC 1542. Additional RFCs supported are:
RFC 951, Bootstrap Protocol(BOOTP)
RFC 2131, Dynamic Host Configuration Protocol
RFC 2132, DHCP Options and BOOTP Vendor Extensions
Figure 11.1 DHCP relay overview
LAN
LAN
LAN
DHCP Relay Agent
DHCP Relay Agent
Local Router DHCP Server
WAN
DHCP Relay Agent
Local Router