ZyXEL Communications GS3700 Series - Example: DHCP Relay for Two VLANs

Chapter 43 DHCP
GS3700/XGS3700 Series User’s Guide
423
The following table describes the labels in this screen.
43.5.2 Example: DHCP Relay for Two VLANs
The following example displays two VLANs (VIDs 1 and 2) for a campus network. Two DHCP servers
are installed to serve each VLAN. The system is set up to forward DHCP requests from the
dormitory rooms (VLAN 1) to the DHCP server with an IP address of 192.168.1.100. Requests from
the academic buildings (VLAN 2) are sent to the other DHCP server with an IP address of
172.16.10.100.
Table 210 IP Application > DHCP > DHCPv4 > VLAN > Port
LABEL DESCRIPTION
VID Enter the ID number of the VLAN you want to configure here.
Port Enter the number of port(s) to which you want to apply the specified DHCP option 82
profile.
You can enter multiple ports separated by (no space) comma (,) or hyphen (-) for a
range. For example, enter “3-5” for ports 3, 4, and 5. Enter “3,5,7” for ports 3, 5, and 7.
In stacking mode, the first number represents the slot and the second the port number.
Enter 1/1-1/ 24,2/28 for ports 1 to 24 for the Switch in slot 1 and port 28 for the Switch
in slot 2, for example.
Option 82 Profile Select a pre-defined DHCP option 82 profile that the Switch applies to the specified
port(s) in this VLAN. The Switch adds the Circuit ID sub-option and/ or Remote ID sub-
option specified in the profile to DHCP requests that it relays to a DHCP server.
Note: The profile you select here has priority over the one you select in the DHCP >
DHCPv4 > VLAN screen.
Add Click this to create a new entry or to update an existing one.
This saves your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation
panel to save your changes to the non-volatile m emory when you are done configuring.
Cancel Click this to reset the values above based on the last selected entry or, if not applicable,
to clear the fields above.
Clear Click Clear to reset the fields to the factory defaults.
Index This field displays a sequential number for each entry. Click an index number to change
the settings.
VID This field displays the VLAN to which the port(s) belongs.
Port This field displays the port(s) to which the Switch applies the settings.
Profile Name This field displays the DHCP option 82 profile that the Switch applies to the port(s) in this
VLAN.
Select an entry’s check box to select a specific entry. Otherwise, select the check box in
the table heading row to select all entries.
Delete Select the configuration entries you want to remove and click Delete to remove them.
Cancel Click Cancel to clear the check boxes.