Dhcp-Snooping Configuration; Enabling The Dhcp-Snooping Function; Displaying Dhcp-Snooping - Huawei Quidway S3100 Series Operation Manual

Operation Manual – DHCP-Snooping
Quidway S3100 Series Ethernet Switches
II. DHCP-Snooping Entry Updating
As DHCP-Snooping entries do not age, the size of a DHCP-Snooping table increases
with number of the IP addresses listened. And a DHCP-Snooping entry remains in a
DHCP-Snooping table even if the IP address contained in it is released by the DHCP
client. In this case, you can remove invalid DHCP-Snooping entries by disabling the
DHCP-Snooping function.
For a DHC-Snooping-enabled switch with large amount of hosts attached to it, you can
enable 802.1x authentication and MAC address authentication as well for the switch to
enable DHCP-Snooping entries to be added/removed dynamically when the users go
offline/online, and thus to prevent memory overuse.

1.2 DHCP-Snooping Configuration

1.2.1 Enabling the DHCP-Snooping Function

Table 1-1 Enable the DHCP-snooping function
Operation
Enter system view
Enable
DHCP-snooping
function

1.3 Displaying DHCP-Snooping

After the above configuration, you can execute the display command in any view to
display the correspondence between user IP addresses and MAC addresses recorded
by the DHCP-snooping function.
Table 1-2 Display DHCP-snooping
Display
correspondence
user IP addresses and
MAC addresses recorded
Command
system-view
the
dhcp-snooping
Operation
the
between display
dhcp-snooping
Huawei Technologies Proprietary
Chapter 1 DHCP-Snooping Configuration
—
Required
By default, the DHCP-snooping
function is disabled.
Command
You
command in any view.
1-3
Description
Description
can execute this