User's Manual

Table Of Contents
308
Users Manual of CS-6306R
there is no binding relationship on this interface. After source IP address monitoring is enabled, the switch
rejected forwarding all IP packets. After the TFTP server is configured for interface binding backup, the
binding relationship will be backed up to the server through the TFTP protocol. After the switch is restarted,
the switch automatically downloads the binding list from the TFTP server, securing the normal running of the
network.
Run the following commands in global configuration mode.
Command Purpose
ip dhcp-relay snooping database-agent
ip-address
Configures the IP address of the TFTP server
which is to back up interface binding.
no ip dhcp-relay snooping database-agent Cancels the TFTP Server for backing up
interface binding.
Configuring a File Name for Interface Binding Backup
When backing up the interface binding relationship, the corresponding file name will be saved on the TFTP
server. In this way, different switches can back up their own interface binding relationships to the same TFTP
server.
Run the following commands in global configuration mode.
Command Purpose
ip dhcp-relay snooping db-file name
Configures a file name for interface binding
backup.
no ip dhcp-relay snooping db-file Cancels a file name for interface binding
backup.
Configuring the Interval for Checking Interface Binding Backup
The MAC-to-IP binding relationship on an interface changes dynamically. Hence, you need check whether the
binding relationship updates after a certain interval. If the binding relationship updates, it need be backed up
again. The default interval is 30 minutes.
Run the following commands in global configuration mode.
Command Purpose
ip dhcp-relay snooping write num
Configures the interval for checking interface
binding backup.
no ip dhcp-relay snooping write Resumes the interval of checking interface
binding backup to the default settings.
Configuring Interface Binding Manually
If a host does not obtain the address through DHCP, you can add the binding item on an interface of a switch
to enable the host to access the network. You can run no ip source binding MAC IP to delete items from the