DHCP C
OMMANDS
35-4
DHCP Relay
ip dhcp restart relay
This command enables DHCP relay for the specified VLAN. Use the no
form to disable it.
Syntax
[no] ip dhcp relay
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.
Table 35-3 DHCP Relay Commands
Command Function Mode Page
ip dhcp restart relay Enables DHCP relay agent IC 35-4
ip dhcp relay server Specifies DHCP server addresses for relay IC 35-5
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