Dhcp Snooping Configuration; Displaying Dhcp Snooping - H3C S3600 Series Operation Manual

Operation Manual – DHCP
H3C S3600 Series Ethernet Switches-Release 1510
DHCP snooping listens the following two types of packets to retrieve the IP addresses
the DHCP clients obtain from DHCP servers and the MAC addresses of the DHCP
clients:
DHCP-ACK packet
DHCP-REQUEST packet

4.2 DHCP Snooping Configuration

Table 4-1 Configure the DHCP snooping function
Operation
Enter system view
Enable the DHCP
snooping function
Enter Ethernet port
view
Set
connected
DHCP server to a
trusted port
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.

4.3 Displaying DHCP Snooping

After the above configurations, you can verify the configurations by executing the
display command in any view.
Table 4-2 Display DHCP snooping
Display the user IP-MAC address
mapping entries recorded by the
DHCP snooping function
Display
state of the DHCP snooping
function and the trusted ports
system-view
dhcp-snooping
interface
interface-number
the port
to a
dhcp-snooping trust
Operation
the (enabled/disabled)
Chapter 4 DHCP Snooping Configuration
Command
interface-type
Command
display
dhcp-snooping [ unit
unit-id ]
display
dhcp-snooping trust
4-3
Description
—
Required
By default, the
snooping function is disabled.
—
Optional
By default, all ports of a
switch are untrusted ports.
Description
You can execute the
display command in
any view
DHCP