Displaying And Maintaining Dhcp Snooping; Dhcp Snooping Configuration Examples; Dhcp Snooping Configuration Example - H3C S5120-SI Series Configuration Manual

Displaying and maintaining DHCP snooping

To do...
Display DHCP snooping entries
Display Option 82 configuration information on
the DHCP snooping device
Display DHCP packet statistics on the DHCP
snooping device
Display information about trusted ports
Clear DHCP snooping entries
Clear DHCP packet statistics on the DHCP
snooping device

DHCP snooping configuration examples

DHCP snooping configuration example

Network requirements
•
As shown in Figure 15, Switch B is connected to a DHCP server through GigabitEthernet 1/0/1, and
to two DHCP clients through GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3.
•
GigabitEthernet 1/0/1 forwards DHCP server responses while the other two do not.
•
Switch B records clients' IP-to-MAC address bindings in DHCP-REQUEST messages and DHCP-ACK
messages received from trusted ports.
Use the command...
display dhcp-snooping [ ip ip-
address ]
display dhcp-snooping
information { all | interface
interface-type interface-number }
display dhcp-snooping packet
statistics
display dhcp-snooping trust
reset dhcp-snooping { all | ip ip-
address }
reset dhcp-snooping packet
statistics
52
Remarks
Available in any
view
Available in user
view