Binding Table Information

DHCP snooping tables include dynamic and static binding tables. Dynamic binding entries are generated through DHCP packets, and static binding entries are manually configured.

Context

The DHCP snooping-enabled device forwards DHCP Request packets of users (DHCP clients) to a valid DHCP server through the trusted interface, and then generates DHCP snooping binding entries according to the DHCP ACK messages received from the DHCP server. When receiving DHCP messages from users through the DHCP snooping-enabled interfaces, the device checks the messages against the binding table, to prevent attacks initiated by unauthorized users.

DHCP snooping tables include dynamic and static binding tables. Dynamic binding entries are generated through DHCP packets, and static binding entries are manually configured. When many static binding entries need to be configured, use a profile to import the entries.

Procedure

Import static binding entries.

Choose Security > DHCP Snooping > Binding Table Information in the navigation tree to open the Binding Table Information page

Table 1 describes the parameters on the page.

**Table 1** Binding Table
Parameter		Description
Interface Name		Indicates the name of the interface where DHCP snooping binding tables are configured.
VLAN ID		Indicates the ID of the VLAN where DHCP snooping binding tables are configured.
IP		Indicates the IP address in a DHCP snooping binding entry.
MAC		Indicates the MAC address in a DHCP snooping binding entry.
Type		Indicates the type of a DHCP snooping binding table, including dynamic and static.

Click Download profile and fill in the static binding table information.
Click Browse to set the path where the profile is stored.
Click Import.

Export static binding entries.
1. Choose Security > DHCP Snooping > Binding Table Information in the navigation tree to open the Binding Table Information page.
2. Click Export.
Query binding table information.
1. Choose Security > DHCP Snooping > Binding Table Information in the navigation tree to open the Binding Table Information page.
2. In the Query area, enter one of multiple of the following conditions:
  - Interface type and interface number
  - VLAN ID
  - IP address
  - MAC address
3. Click Query.
Update binding table information.
1. Choose Security > DHCP Snooping > Binding Table Information in the navigation tree to open the Binding Table Information page.
2. Click Refresh.
Delete binding entries.
1. Choose Security > DHCP Snooping > Binding Table Information in the navigation tree to open the Binding Table Information page.
2. Select binding entries and click Delete. Click OK in the diaplayed dialog box.