Black Box LGB6026A, Management Manual

Page: 1048 / 1289

– 1046 –
C
HAPTER
44 | DHCP Commands
DHCP Relay
E
XAMPLE
Console(config)#interface vlan 1
Console(config-if)#ip dhcp relay server 10.1.0.99
Console(config-if)#
R
ELATED
C
OMMANDS
ip dhcp restart relay (1046)
ip dhcp restart relay
This command enables DHCP relay for the specified VLAN. Use the no form
to disable it.
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Privileged Exec
C
OMMAND
U
SAGE
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.
E
XAMPLE
In the following example, the device is reassigned the same address.
Console(config)#ip dhcp restart relay
Console(config)#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#
R
ELATED
C
OMMANDS
ip dhcp relay server (1045)