286 CHAPTER 25: DHCP SNOOPING CONFIGURATION
DHCP Snooping
Configuration
n
After DHCP snooping is enabled on an Ethernet switch, clients connected with this
switch cannot obtain IP addresses dynamically through BOOTP.
DHCP Snooping
Configuration
Example
Network requirements As shown in Figure 88, Ethernet1/0/5 of the switch is connected to the DHCP
server, and Ethernet1/0/1, Ethernet1/0/2, and Ethernet1/0/3 are respectively
connected to Client A, Client B, and Client C. Enable DHCP snooping on the
switch.
Network diagram Figure 88 Network diagram for DHCP snooping configuration
Configuration procedure # Enable DHCP snooping on the switch.
<4210> system-view
[4210] dhcp-snooping
Tabl e 214 Configure DHCP snooping
Operation Command Description
Enter system view system-view -
Enable DHCP snooping dhcp-snooping Required
By default, the DHCP snooping
function is disabled.
Display the user IP-MAC address
mapping entries recorded by the
DHCP snooping function
display
dhcp-snooping [
unit unit-id ]
You can execute the display
command in any view
Eth
1
/
0
/
2
Client B
Switch
DHCP Snooping
Client A
Eth
1
/
0
/
1
Client C
Eth
1
/
0
/
3
Eth
1
/
0
/
5
DHCP Server
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