Dhcp Snooping & Dhcp Vlan Commands - ZyXEL Communications XS3800-28 Cli Reference Manual

DHCP Snooping & DHCP
Use the dhcp snooping commands to configure the DHCP snooping on the Switch and the dhcp vlan
commands to specify a DHCP VLAN on your network. DHCP snooping filters unauthorized DHCP packets
on the network and builds the binding table dynamically.
22.1 Command Summary
The following section lists the commands for this feature.
Table 68 dhcp snooping Command Summary
COMMAND
show dhcp snooping
show dhcp snooping binding
show dhcp snooping database
show dhcp snooping database
detail
show dhcp snooping option [vlan
<vlan-list>] [interface <port-
list>]
dhcp snooping
no dhcp snooping
dhcp snooping database <tftp://
host/filename>
no dhcp snooping database
dhcp snooping database timeout
<seconds>
no dhcp snooping database
timeout
dhcp snooping database write-
delay <seconds>
VLAN Commands
DESCRIPTION
Displays DHCP snooping configuration on the Switch.
Displays the DHCP binding table.
Displays DHCP snooping database update statistics and
settings.
Displays DHCP snooping database update statistics in full
detail form.
Displays the DHCP option 82 profile that the Switch applies
to ports in the specified VLAN or to the specified port(s).
Enables DHCP Snooping on the Switch.
Disables DHCP Snooping on the Switch.
Specifies the location of the DHCP snooping database.
The location should be expressed like this: tftp://{domain
name or IP address}/directory, if applicable/file name; for
example, tftp://192.168.10.1/database.txt.
Removes the location of the DHCP snooping database.
Specifies how long (10-65535 seconds) the Switch tries to
complete a specific update in the DHCP snooping
database before it gives up.
Resets how long (10-65535 seconds) the Switch tries to
complete a specific update in the DHCP snooping
database before it gives up to the default value (300).
Specifies how long (10-65535 seconds) the Switch waits to
update the DHCP snooping database the first time the
current bindings change after an update.
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