ZyXEL Communications GS1920-48HPv2, Руководство пользователя

Страница: 332 / 432

Chapter 37 DHCP
GS1920v2 Series User’s Guide
332
37.4.8 Exa m ple : DHC P Re la y fo r 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.
Fig ure 240
DHCP Relay for Two VLANs
For the example network, configure the
VLAN Se tting
screen as shown.
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.
The profile you select here has priority over the one you select in the
DHC P > DHC Pv4 > 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
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.
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 entry(ies) that you want to remove, then click the
De le te
button to remove the
selected entry(ies) from the table.
Cancel Click this to clear the check boxes above.
Table 161 IP Application > DHCP > DHCPv4 > VLAN > Port (continued)
LABEL DESC RIPTIO N