Dhcp; Chapter 54 Dhcp; Dhcp Overview; What You Can Do - ZyXEL Communications XGS4600 Series User Manual

54.1 DHCP Overview

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. You can configure the Switch as a DHCP server or
a DHCP relay agent. When configured as a server, the Switch provides the TCP/IP configuration for the
clients. If you configure the Switch as a relay agent, then the Switch forwards DHCP requests to DHCP
server on your network. If you do not configure the Switch as a DHCP server or 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.
The Dynamic Host Configuration Protocol for IPv6 (DHCPv6, RFC 3315) is a server-client protocol that
allows a DHCP server to assign and pass IPv6 network addresses, prefixes and other configuration
information to DHCP clients. DHCPv6 servers and clients exchange DHCP messages using UDP. Each
DHCP client and server has a unique DHCP Unique IDentifier (DUID), which is used for identification when
they are exchanging DHCPv6 messages. The DUID is generated from the MAC address, time, vendor
assigned ID and/or the vendor's private enterprise number registered with the IANA. It should not
change over time even after you reboot the device.

54.1.1 What You Can Do

• Use the DHCPv4 Status screen
• Use the DHCPv4 Server Status Detail screen
DHCP server settings configured on the Switch.
• Use the DHCPv4 Option 82 Profile screen
profiles.
• Use the DHCPv4 Global Relay screen
• Use the DHCPv4 Global Relay Port screen
option 82 profile to certain ports on the Switch.
• Use the VLAN Setting screen
the VLAN domain of the DHCPv4 clients.
• Use the DHCPv4 VLAN Port screen
profile to certain ports in a VLAN.
• Use the DHCPv6 Status screen
• Use the DHCPv6 Information screen
settings on the Switch.
• Use the DHCPv6 Prefix Delegation screen
IPv6 prefix settings for a specific VLAN on the Switch.

Chapter 54 DHCP

C
(Section 54.3 on page
(Section 54.3.1 on page
(Section 54.4.2 on page
(Section 54.4.3 on page
(Section 54.4.4 on page
(Section 54.4.6 on page
(Section 54.4.7 on page
(Section 54.5 on page
(Section 54.6 on page
(Section 54.7 on page
XGS4600 Series User's Guide
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H A P T E R
484) to display the server status and relay mode.
484) to view details regarding
487) to create DHCPv4 option 82
488) to configure global DHCPv4 relay.
489) to apply a different DHCP
491) to configure your DHCPv4 settings based on
492) to apply a different DHCP option 82
495) to see information on the DHCPv6 server.
495) to configure DHCPv6 and DNS server
496) to configure DHCPv6 client and
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DHCP