H3C Technologies H3C S3100 Series Switches - Manual (Page 360)

Operation Manual – DLDP
H3C S3100-52P Ethernet Switch Chapter 2 DHCP Snooping Configuration
2-3
Operation Command Description
Set the port
connected to a
DHCP server to a
trusted port
dhcp-snooping trust
Optional
By default, all ports of a
switch are untrusted ports.
Note:
When you need to enable DHCP snooping on the switches in a fabric state, configure
the fabric ports on all devices to be trusted ports to ensure that the users connected to
each device can obtain IP addresses.
2.3 Displaying DHCP Snooping
After the above configurations, you can verify the configurations by executing the
display
command in any view.
Table 2-2
Display DHCP snooping
Operation Command Description
Display the user IP-MAC address
mapping entries recorded by the
DHCP snooping function
display
dhcp-snooping
[ unit
unit-id
]
Display the (enabled/disabled)
state of the DHCP snooping
function and the trusted ports
display
dhcp-snooping trust
You can execute the
display
command in
any view
2.4 Configuration Example
I. Network requirements
As shown in Figure 2-1, the Ethernet1/0/1 port of Switch A ( S3100-52P ) is connected
to Switch B (acting as a DHCP relay). A network segment containing some DHCP
clients is connected to the Ethernet1/0/2 port of Switch A.
z
Enable the DHCP snooping function on Switch A.
z
Set the Ethernet1/0/1 port of Switch A to a trusted port.
II. Configuration procedure
# Enter system view.
system-view
# Enable the DHCP snooping function.