Dasan V5808 - Static DHCP Snooping Binding; DHCP Snooping Database Agent

UMN:CLI User Manual
V5808
350
8.5.7.7 Static DHCP Snooping Binding
The DHCP snooping binding table contains a hardware address, IP address, lease time,
VLAN ID, and port information that correspond to the untrusted interfaces of the system.
To manually specify a DHCP snooping binding entry, use the following command.
Command
Mode
Description
ip dhcp snooping binding <1-
4094> PORT A.B.C.D MAC-ADDR
<120-2147483637>
Global
Configures binding on DHCP snooping table.
1-4094: VLAN ID
PORT: port number
A.B.C.D: IP address
MAC-ADDR: MAC address
120-2147483637: lease time (unit: second)
clear ip dhcp snooping binding
PORT {A.B.C.D | all}
Deletes a specified static DHCP snooping binding.
all: all DHCP snooping bindings
8.5.7.8 DHCP Snooping Database Agent
When the DHCP snooping is enabled, the system uses the DHCP snooping binding
database to store information about untrusted interfaces. Each database entry (binding)
has an IP address, associated MAC address, lease time, interface to which the binding
applies and VLAN to which the interface belongs.
You can save the current binding entries in a file at a remote location (TFTP server).
Upon reloading, the switch can read the file to build the DHCP snooping database for the
binding. The system keeps the current file by writing to the file as the database changes.
To specify a TFTP server and interval to back up the DHCP snooping database, use the
following command.
Command
Mode
Description
ip dhcp snooping database
A.B.C.D INTERVAL
Global
Specifies a TFTP server to save the backup file of
DHCP snooping database. Sets the interval of how
often the DHCP snooping binding DB will be backed
up.
A.B.C.D: TFTP server address
INTERVAL: 120-2147483637 (unit: second)
no ip dhcp snooping database
Deletes the configured TFTP server address and
interval for DHCP snooping DB backup.
To restore the DHCP snooping binding entries from a TFTP server, use the following
command.
Command
Mode
Description
ip dhcp snooping database
renew A.B.C.D
Global
Reads the current DHCP snooping database file from a
TFTP server.
A.B.C.D: TFTP server address
ip dhcp snooping database
renew auto {on | off}
Enables/disables the system to be automatically
restored the DHCP snooping DB file from the TFTP
server after a restart or reload of the switch.