ZyXEL GS1920 Series User Guide - Page 203
DHCP Snooping
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Chapter 25 IP Source Guard The following table describes the labels in this screen. Table 90 Advanced Application > IP Source Guard > Static Binding LABEL DESCRIPTION ARP Freeze ARP Freeze allows you to automatically create static bindings from the current ARP entries (either dynamically learned or static ARP entries) until the Switch's binding table is full. Condition Static Binding MAC Address IP Address VLAN Port Add Cancel Clear Index MAC Address IP Address Lease Type VLAN Port Delete Cancel Note: The ARP learning mode should be set to ARP-Request in the IP Application > ARP Setup > ARP Learning screen before you use the ARP Freeze feature. All - Select this and click ARP Freeze to have the Switch automatically add all the current ARP entries to the static bindings table. Port List - Select this and enter the number of the port(s) (separated by a comma). ARP entries learned on the specified port(s) are added to the static bindings table after you click ARP Freeze. VLAN List - Select this and enter the ID number of the VLAN(s) (separated by a comma). ARP entries for the specified VLAN(s) are added to the static bindings table after you click ARP Freeze. Enter the source MAC address in the binding. Enter the IP address assigned to the MAC address in the binding. Enter the source VLAN ID in the binding. Specify the port(s) in the binding. If this binding has one port, select the first radio button and enter the port number in the field to the right. If this binding applies to all ports, select Any. Click this to create the specified static binding or to update an existing one. Click this to reset the values above based on the last selected static binding or, if not applicable, to clear the fields above. Click this to clear the fields above. This field displays a sequential number for each binding. This field displays the source MAC address in the binding. This field displays the IP address assigned to the MAC address in the binding. This field displays how long the binding is valid. This field displays how the Switch learned the binding. static: This binding was learned from information provided manually by an administrator. This field displays the source VLAN ID in the binding. This field displays the port number in the binding. If this field is blank, the binding applies to all ports. Select this, and click Delete to remove the specified entry. Click this to clear the Delete check boxes above. 25.4 DHCP Snooping Use this screen to look at various statistics about the DHCP snooping database. To open this screen, click Advanced Application > IP Source Guard > DHCP Snooping. GS1920 Series User's Guide 203