XGS-5240-Series User Manual

Configuration Guide of XGS-5240-Series
36-9
2. Configure DHCP relay to forward DHCP broadcast packet.
Command
Explanation
Global Mode
ip forward-protocol udp bootps
no ip forward-protocol udp bootp
s
The UDP port 67 is used for DHCP broadcast
packet forwarding.
Interface Configuration Mode
ip helper-address <ipaddress>
no ip helper-address <ipaddress>
Set the destination IP address for DHCP relay
forwarding; the “no ip helper-address
<ipaddress>“command cancels the setting.
36.4 DHCP Configuration Examples
Scenario 1:
Too save configuration efforts of network administrators and users, a company is using
switch as a DHCP server. The Admin VLAN IP address is 10.16.1.2/16. The local area network
for the company is divided into network A and B according to the office locations. The network
configurations for location A and B are shown below.
PoolA(network 10.16.1.0)
PoolB(network 10.16.2.0)
Device
IP address
Device
IP address
Default gateway 10.16.1.200
10.16.1.201
Default gateway 10.16.1.200
10.16.1.201
DNS server
10.16.1.202
DNS server
10.16.1.202
WINS server
10.16.1.209
WWW server
10.16.1.209
WINS node type
H-node
Lease
3 days
Lease
1day
In location A, a machine with MAC address 00-03-22-23-dc-ab is assigned with a fixed IP
address of 10.16.1.210 and named as “management”.
Switch(config)#service dhcp
Switch(config)#interface vlan 1
Switch(Config-Vlan-1)#ip address 10.16.1.2 255.255.0.0
Switch(Config-Vlan-1)#exit
Switch(config)#ip dhcp pool A
Switch(dhcp-A-config)#network 10.16.1.0 24
Switch(dhcp-A-config)#lease 3
Switch(dhcp-A-config)#default-route 10.16.1.200 10.16.1.201