User`s guide

NetAtlas Enterprise Ethernet Switch Manager User’s Guide
Chapter 14 Switch Configuration 118
If there is an Ethernet device that performs the DHCP server function for 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 Ethernet device (the DHCP server) for the
necessary IP information, and then relays the assigned information back to the computer.
14.4.5 DHCP Relay Agent Information
The switch can add information to client TCP/IP configuration 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 TCP/IP configuration 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 TCP/IP configuration 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)
Enable DHCP relay in the Switch Setup screen.
To configure DHCP relay, click Configuration, Switch Configuration and the DHCP Relay
tab. A screen displays as shown.
Figure 79 Switch Configuration: DHCP Relay