ZyXEL Communications XS3800-28 Cli Reference Manual page 88

Figure 4 Example: Global DHCP Relay
DHCP Server:
192.168.1.100
VLAN1
This example shows how to configure the Switch for this configuration. DHCP relay agent information
option 82 is also enabled.
sysname# configure
sysname(config)# dhcp smart-relay
sysname(config)# dhcp smart-relay helper-address 192.168.1.100
sysname(config)# dhcp smart-relay option
sysname(config)# exit
sysname# show dhcp smart-relay
DHCP Relay Agent Configuration
Active: Yes
Remote DHCP Server 1:192.168.1.100
Remote DHCP Server 2:
Remote DHCP Server 3:
Option82: Enable
In this example, there are two VLANs (VIDs 1 and 2) in a campus network. Two DHCP servers are installed
to serve each VLAN. The Switch forwards DHCP requests from the dormitory rooms (VLAN 1) to the DHCP
server with IP address 192.168.1.100. DHCP requests from the academic buildings (VLAN 2) are sent to
the other DHCP server with IP address 172.16.10.100.
Figure 5 Example: DHCP Relay for Two VLANs
VLAN 1
VLAN 2
Chapter 21 DHCP Commands
0.0.0.0
0.0.0.0
Option82Inf: Disable
Ethernet Switch CLI Reference Guide
88
VLAN2
DHCP: 192.168.1.100
DHCP: 172.16.10.100