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)
30.4.2Configuring 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 98 DHCP: Relay
The following table describes the labels in this screen.
Table 71 DHCP: Relay
LABEL | DESCRIPTION |
|
|
Active | Select this check box to enable DHCP relay. |
|
|
Remote DHCP | Enter the IP address of a DHCP server in dotted decimal notation. |
Server 1 .. 3 |
|
Relay Agent | Select the Option 82 check box to have the switch add information (slot number, port |
Information | number and VLAN ID) to client DHCP requests that it relays to a DHCP server. |
Information | This |
| 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. |
Chapter 30 DHCP | 188 |