100
Hardware
DHCP packet blocking port
compatibility
MSR3012/3024/3044/3064 Yes
MSR4060/4080 Yes
Perform this task to configure a port as a DHCP packet blocking port. This blocking port drops all
incoming DHCP requests.
To configure a DHCP packet blocking port:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface
interface-type
interface-number
N/A
3. Configure the port to block
DHCP requests.
dhcp snooping deny
By default, the port does not block
DHCP requests.
Enabling DHCP snooping logging
The DHCP snooping logging feature enables the DHCP snooping device to generate DHCP
snooping logs and send them to the information center. For information about the log destination and
output rule configuration in the information center, see Network Management and Monitoring
Configuration Guide.
As a best practice, disable this feature if the log generation affects the device performance.
To enable DHCP snooping logging:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enable DHCP snooping
logging.
dhcp snooping log enable
By default, DHCP snooping
logging is disabled.
Displaying and maintaining DHCP snooping
Execute display commands in any view, and reset commands in user view.
Task Command Remarks
Display DHCP snooping entries.
display dhcp snooping binding
[
ip
ip-address [
vlan
vlan-id ] ]
Available in any
view.
Display Option 82 configuration
information on the DHCP snooping
device.
display dhcp snooping information
{
all
|
interface
interface-type interface-number }
Available in any
view.
Display DHCP packet statistics on the
DHCP snooping device (centralized
devices in standalone mode).
display dhcp snooping packet statistics
Available in any
view.
Display DHCP packet statistics on the
DHCP snooping device (distributed
display dhcp snooping packet statistics
[
slot
slot-number ]
Available in any
view.
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