Dhcp Relay Agent Information; Configuring Dhcp Relay; Figure 91 Dhcp: Relay; Table 66 Dhcp: Relay - ZyXEL Communications ES-2724 User Manual

28.4.1 DHCP Relay Agent Information

The switch can add information to client DHCP requests that it relays to a DHCP server. This
helps provide authentication about the source of the requests. You can also specify additional
information for the switch to add to the client DHCP requests that it relays to the DHCP
server. Please refer to RFC 3046 for more details.
The DHCP relay agent information feature adds an Agent Information field to the option 82
field of the DHCP headers of client DHCP request frames that the switch relays to a DHCP
server. The following lists the DHCP relay agent option 82 information that the switch sends
to the DHCP server:
• Slot ID (1 byte)
• Port ID (1 byte)
• VLAN ID (2 bytes)
• System name (up to 32 bytes, this is optional)

28.4.2 Configuring DHCP Relay

Configure DHCP relay in the DHCP Relay screen. Click IP Application, DHCP in the
navigation panel and click the Relay link to display the screen as shown.

Figure 91 DHCP: Relay

The following table describes the labels in this screen.

Table 66 DHCP: Relay

LABEL
Active
Remote DHCP
Server 1 .. 3
Relay Agent
Information
Information
Chapter 28 DHCP
DESCRIPTION
Select this check box to enable DHCP relay.
Enter the IP address of a DHCP server in dotted decimal notation.
Select the Option 82 check box to have the switch add information (slot number, port
number and VLAN ID) to client DHCP requests that it relays to a DHCP server.
This read-only field displays the system name you configure in the General Setup
screen.
Select the check box for the switch to add the system name to the client DHCP
requests that it relays to a DHCP server.
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