Dhcp Snooping Configuration Example - HP 1920 Gigabit Ethernet Switch Series User Manual

Item
Type
Interface Name
VLAN
Remaining Lease Time

DHCP snooping configuration example

Network requirements
As shown in
GigabitEthernet 1/0/1, and to DHCP clients through GigabitEthernet 1/0/2 and GigabitEthernet
1/0/3.
Enable DHCP snooping on Switch B and configure DHCP snooping to support Option 82.
•
Configure the handling strategy for DHCP requests containing Option 82 as replace.
Enable GigabitEthernet 1/0/1 to forward DHCP server responses. Disable GigabitEthernet 1/0/2
•
and GigabitEthernet 1/0/3 from forwarding DHCP server responses.
Configure Switch B to record clients' IP-to-MAC address bindings in DHCP-REQUEST messages and
•
DHCP-ACK messages received from a trusted port.
Figure 288 Network diagram
Configuring Switch B
1. Enable DHCP snooping:
a. From the navigation tree, select Network > DHCP.
b. Click the DHCP Snooping tab.
c. As shown in
snooping.
Description
Displays the client type:
•
Dynamic—The IP-to-MAC binding is generated dynamically.
•
Static—The IP-to-MAC binding is configured manually. Static bindings are not
supported.
Displays the device interface to which the client is connected.
Displays the VLAN to which the device belongs.
Displays the remaining lease time of the IP address.
Figure 288, a DHCP snooping device (Switch B) is connected to a DHCP server through
Figure 289, select the Enable option next to DHCP Snooping to enable DHCP
311