ZyXEL Communications ES-315-F - V3.70 Guía de usuario descargar pdf (Pagina 198)

GS-4012F/4024 User’s Guide

Chapter 30 DHCP 197

30.4.1 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)

30.4.2 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 103 DHCP: Relay

The following table describes the labels in this screen.

Table 76 DHCP: Relay

LABEL DESCRIPTION

Active Select this check box to enable DHCP relay.

Remote DHCP

Server 1 .. 3

Enter the IP address of a DHCP server in dotted decimal notation.

Relay Agent

Information

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.

Information 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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ZyXEL Communications ES-315-F - V3.70 Guía de usuario Pagina 198