АМАТЕК AN-SGM28P24-400 [208/322] Dhcp snooping binding list is uploaded and

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15.1.4 DHCP SNOOPING binding list is uploaded and

downloaded

DHCP SNOOPING records the binding relationship between IP and MAC by monitoring the

DHCP message, and maintains its binding table. When the switch is switched off, restart or

malfunction occurs, the binding table will be lost when the power is cut off unexpectedly, and the

switch needs to learn the binding table entries after restarting. In the network topology, it is

difficult to identify the network connection interruption and restart the DHCP discover process,

unless the host is directly connected, and the switch will be difficult to re learn the binding

information. For this reason, the binding table is saved on the TFTP server and the binding table is

downloaded after the switch is restarted, which can solve the transient memory gap when the

switch is restarted. The switch provides the binding table upload and download function, the

administrator can be ordered through the manual upload or download the binding table, can

automatically upload configuration commands, uploaded the binding table; the binding table

command in the starting process from the TFTP server to download the backup file and the

binding table has the binding table into the DHCP SNOOPING protocol module automatically

restart the download。

15.2 DHCP SNOOPING configuration

15.2.1 DHCP SNOOPING default configuration

DHCP SNOOPING is closed by default。

DHCP SNOOPING binding table type REQ entry delay timer default time interval is 10

seconds。

15.2.2 Global open and close DHCP SNOOPING

When the DHCP SNOOPING is opened globally, the DHCP SNOOPING of an interface can

be turned on or off, and DHCP SNOOPING of all interfaces must be turned off before the global

DHCP SNOOPING can be turned off。