SNR S2940-8G-v2 Switch Configuration Guide
DHCP Configuration
Switch(config)#ip dhcp pool A1
Switch(dhcp-A1-config)#host 10.16.1.210
Switch(dhcp-A1-config)#hardware-address 00-03-22-23-dc-ab
Switch(dhcp-A1-config)#exit
Usage Guide: When a DHCP/BOOTP client is connected to a VLAN1 port of the switch,
the client can only get its address from 10.16.1.0/24 instead of 10.16.2.0/24. This is because the
broadcast packet from the client will be requesting the IP address in the same segment of the VLAN
interface after VLAN interface forwarding, and the VLAN interface IP address is 10.16.1.2/24,
therefore the IP address assigned to the client will belong to 10.16.1.0/24.
If the DHCP/BOOTP client wants to have an address in 10.16.2.0/24, the gateway forwarding
broadcast packets of the client must belong to 10.16.2.0/24. The connectivity between the client
gateway and the switch must be ensured for the client to get an IP address from the 10.16.2.0/24
address pool.
Scenario 2:
Figure 34.3: DHCP Relay Configuration
As shown in the above figure, route switch is configured as a DHCP relay. The DHCP server
address is 10.1.1.10, the configuration steps is as follows:
Switch(config)#service dhcp
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip address 192.168.1.1 255.255.255.0
Switch(Config-if-Vlan1)#exit
Switch(config)#vlan 2
Switch(Config-Vlan-2)#exit
Switch(config)#interface Ethernet 1/0/2
Switch(Config-Erthernet1/0/2)#switchport access vlan 2
Switch(Config-Erthernet1/0/2)#exit
Switch(config)#interface vlan 2
Switch(Config-if-Vlan2)#ip address 10.1.1.1 255.255.255.0
Switch(Config-if-Vlan2)#exit
Switch(config)#ip forward-protocol udp bootps
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip help-address 10.1.1.10
Switch(Config-if-Vlan1)#exit
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