T3700G-28TQ
JetStream 28-Port Gigabit Stackable L3 Managed Switch CLI Guide
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Chapter 35 DHCP Relay
A DHCP Relay is a Layer 3 device that forwards DHCP packets between clients and servers.
DHCP Relay forward requests and replies between clients and servers when they are not on the
same physical subnet.
ip helper-address
Description
The ip helper-address command is used to add DHCP Server address to the
Layer 3 interface. To delete the server address, please use no ip
helper-address command.
Syntax
ip helper-address ip-address
no ip helper-address [ ip-address ]
Parameter
ip-address —— DHCP Server address.
Command Mode
Interface Configuration Mode
Example
Add DHCP Server address 192.168.2.1 to interface VLAN 1:
T3700G-28TQ(config)# interface vlan 1
T3700G-28TQ (config-if)# ip helper-address 192.168.2.1
ip dhcp relay information
Description
The ip dhcp relay information command is used to enable option 82 support in
DHCP Relay. To disable this function, please use no ip dhcp relay information
command.
Syntax
ip dhcp relay information
no ip dhcp relay information
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