SMC Networks SMC6724L3 manual 100

COMMAND LINE INTERFACE

Default Setting

Disabled

Command Mode

Interface Configuration (VLAN)

Command Usage

This command is used to configure DHCP relay functions for host devices attached to the switch. If DHCP relay service is enabled, and this switch sees a DHCP request broadcast, it inserts its own IP address into the request so the DHCP server will know the subnet where the client is located. Then, the switch forwards the packet to the DHCP server on another network. When the server receives the DHCP request, it allocates a free IP address for the DHCP client from its defined scope for the DHCP client’s subnet, and sends a DHCP response back to the DHCP relay agent (i.e., this switch). This switch then broadcasts the DHCP response received from the server to the client.

Example

In the following example, the device is reassigned the same address.

Console(config)#interface vlan 1

Console(config-if)#ip dhcp relay

Console(config-if)#end

Console#show ip interface

Vlan 1 is up, addressing mode is Dhcp

Interface address is 10.1.0.254, mask is 255.255.255.0, Primary MTU is 1500 bytes

Proxy ARP is disabled Split horizon is enabled

Console#

Related Commands

ip dhcp relay server (4-101)

4-100