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Chapter 13 DHCP Commands
Ethernet Switch CLI Reference Guide
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13.2 Command Examples
In this example, the Switch relays DHCP requests for the VLAN1 and VLAN2 domains.
There is only one DHCP server for DHCP clients in both domains.
Figure 3 Example: Global DHCP Relay
This example shows how to configure the Switch for this configuration. DHCP relay agent
information option 82 is also enabled.
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.
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: 0.0.0.0
Remote DHCP Server 3: 0.0.0.0
Option82: Enable Option82Inf: Disable
VLAN1
VLAN2
192.168.1.100
DHCP Server: