Dhcp; Dhc P; Dhcp Overview; What You Can Do - ZyXEL Communications GS2220 Series User Manual

44.1 DHC P O ve rvie w
This chapter shows you how to configure the DHCP feature.
DHCP (Dynamic Host Configuration Protocol RFC 2131 and RFC 2132) allows individual computers to
obtain TCP/IP configuration at start-up from a server. If you configure the Switch as a DHCP relay agent,
then the Switch forwards DHCP requests to DHCP server on your network. If you do not configure the
Switch as a DHCP relay agent then you must have a DHCP server in the broadcast domain of the client
computers or else the client computers must be configured manually.
44.1.1 Wha t Yo u C a n Do
• Use the
DHC Pv4 Sta tus
• Use the
DHC Pv4 O ptio n 82 Pro file
profiles.
• Use the
DHC Pv4 G lo b a l Re la y
• Use the
DHC Pv4 G lo b a l Re la y Po rt
option 82 profile to certain ports on the Switch.
• Use the
VL AN Se tting
the VLAN domain of the DHCPv4 clients.
• Use the
DHC Pv4 VL AN Po rt
profile to certain ports in a VLAN.
• Use the
DHC Pv6 Re la y
• Use the
DHC P Se rve r G ua rd
untrusted ports for DHCP packets.
44.1.2 Wha t Yo u Ne e d to Kno w
Read on for concepts on DHCP that can help you configure the screens in this chapter.
DHC P Mo de s
If there is already a DHCP server on your network, then you can configure the Switch as a DHCP relay
agent. When the Switch receives a request from a computer on your network, it contacts the DHCP
server for the necessary IP information, and then relays the assigned information back to the computer.
Chapter 44 DHCP
screen (Section 44.3 on page
screen (Section 44.4.2 on page
screen (Section 44.4.3 on page
screen (Section 44.4.4 on page
screen (Section 44.4.6 on page
screen (Section 44.4.7 on page
screen (Section 44.5 on page
screen (Section 44.6 on page
GS2220 Series User's Guide
370
C
HA PTER
371) to display the relay mode.
373) to create DHCPv4 option 82
374) to configure global DHCPv4 relay.
375) to apply a different DHCP
377) to configure your DHCPv4 settings based on
378) to apply a different DHCP option 82
380) to enable and configure DHCPv6 relay.
382) to specify whether ports are trusted or
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DHC P