ZyXEL Communications GS2220 Series - Global DHCP Relay Configuration Example

Chapter 44 DHCP
GS2220 Series User’s Guide
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The following table describes the labels in this screen.
44.4.5 G lo b a l DHC P Re la y Co nfig ura tio n Exa m ple
The follow figure shows a network example where the Switch is used to relay DHCP requests for the
VLAN1 and VLAN2 domains. There is only one DHCP server that services the DHCP clients in both
domains.
Table 196 IP Application > DHCP > DHCPv4 > Global > Port
LABEL DESCRIPTIO N
Port Enter the number of ports 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 example,
enter “3–5” for ports 3, 4, and 5. Enter “3,5,7” for ports 3, 5, and 7.
Option 82 Profile Select a pre-defined DHCP option 82 profile that the Switch applies to the specified ports. 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.
The profile you select here has priority over the one you select in the DHC P > DHC Pv4 > G lo b a l
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 Sa ve link on the top navigation panel to save your changes
to the non-volatile memory 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 C le a r 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.
Port This field displays the ports to which the Switch applies the settings.
Profile Name This field displays the DHCP option 82 profile that the Switch applies to the ports.
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 entries that you want to remove, then click the De le te button to remove the selected
entries from the table.
Cancel Click this to clear the check boxes above.