ZyXEL Communications GS-2750 - Manual (Page 240)

Chapter 29 DHCP
GS-2750 User’s Guide
240
29.5.1 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 172.23.10.100.
Primary/
Secondary
DNS
Server
Enter the IP addresses of the DNS servers. The DNS servers are passed to the
DHCP clients along with the IP address and the subnet mask.
Relay Use this section if you want to configure the Switch to function as a DHCP relay for
this VLAN.
Remote
DHCP
Server 1 ..
3
Enter the IP address of a DHCP server in dotted decimal notation.
Relay
Agent
Information
Select the Option 82 check box to have the Switch add information (slot number,
port number and VLAN ID) to client DHCP requests that it relays to a DHCP server.
Information This read-only field displays the system name you configure in the General Setup
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.
Add Click Add to save 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 memory when you are
done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Clear Click this to clear the fields above.
VID This field displays the ID number of the VLAN group to which this DHCP settings
apply.
Type This field displays Server or Relay for the DHCP mode.
DHCP Status For DHCP server configuration, this field displays the starting IP address and the size
of the IP address pool.
For DHCP relay configuration, this field displays the first remote DHCP server IP
address.
Delete Select the configuration entries you want to remove and click Delete to remove them.
Cancel Click Cancel to clear the Delete check boxes.
Table 92 IP Application > DHCP > VLAN (continued)
LABEL DESCRIPTION