Siemens S323 User Manual

UMN:CLI                                                                                                                                                              User  Manual 

SURPASS hiD 6615 S223/S323 R1.5 

260                                                                         A50010-Y3-C150-2-7619 

When 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. 

To maintain the binding when reload the system, you must use DHCP snooping database 
agent. If the agent is not used, the DHCP snooping binding will be lost when the switch is 
rebooted. The mechanism for the database agent saves the binding in a file at a remote 
location. Upon reloading, the switch reads the file to build the database for the binding. 
The system keeps the current file by writing to the file as the database changes. 

 

To specify a DHCP database agent and enable an automatic DHCP snooping database 
back-up, use the following command. 

 

 INTERVAL 

Specifies a DHCP snooping database agent and back-
up interval. 
A.B.C.D: DHCP snooping database agent address 
INTERVAL: 120-2147483637 (unit: second) 

Global 

Deletes a specified DHCP snooping database agent. 

 

To request snooping binding entries from a DHCP snooping database agent, use the fol-
lowing command. 

 A.B.C.D 

Global 

Requests snooping binding entries from a DHCP 
snooping database agent. 
A.B.C.D: DHCP snooping database agent address 

 

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. 

 <1-

4094> PORT A.B.C.D MAC-ADDR 
<120-2147483637> 

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) 

 

 {A.B.C.D | all} 

Global 

Releases configured binding on DHCP snooping table.