Command Line Interface
978 1553-KDU 137 365 Uen D 2006-06-16
Command Usage
This command is used to configure DHCP relay functions for host devices
attached to the ECN330-switch. If DHCP relay service is enabled, and the
ECN330-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 ECN330-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 (that is, the ECN330-switch). The ECN330-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.
Related Commands
ip dhcp relay server (section 7.23.4 on page 979)
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#
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