D-Link DGS-3120-48PC-SI Product Manual - Page 219
IMPB Entry Settings, MAC Block List, Security > IP-MAC-Port Binding IMPB > MAC Block List
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xStack® DGS-3120 Series Managed Switch Web UI Reference Guide legal IP packets are forwarded, while the illegal IP packets are dropped. When IP Inspection is enabled, and ARP Inspection is disabled, all non-IP packets (Ex. L2 packets, or ARP) are forwarded by default. The default value is Disabled. Zero IP Use the pull-down menu to enable or disable this feature. Allow zero IP configures the state which allows ARP packets with 0.0.0.0 source IP to bypass. DHCP Packet By default, the DHCP packet with broadcast DA will be flooded. When set to disable, the broadcast DHCP packet received by the specified port will not be forwarded in strict mode. This setting is effective when DHCP snooping is enabled, in the case when a DHCP packet which has been trapped by the CPU needs to be forwarded by the software. This setting controls the forwarding behavior in this situation. Stop Learning Threshold Here is displayed the number of blocked entries on the port. The default value is 500. Click the Apply button to accept the changes made. IMPB Entry Settings This window is used to create static IP-MAC-binding port entries and view all IMPB entries on the Switch. To view this window, click Security > IP-MAC-Port Binding (IMPB) > IMPB Entry Settings as shown below: Figure 8-21 IMPB Entry Settings window The fields that can be configured are described below: Parameter Description IP Address Enter the IP address to bind to the MAC address set below. MAC Address Enter the MAC address to bind to the IP Address set above. Ports Specify the switch ports for which to configure this IP-MAC binding entry (IP Address + MAC Address). Tick the All Ports check box to configure this entry for all ports on the Switch. Click the Apply button to accept the changes made. Click the Find button to locate a specific entry based on the information entered. Click the Edit button to configure the specified entry. Click the Delete button to remove the specified entry. Click the View All button to display all the existing entries. Click the Delete All button to remove all the entries listed. MAC Block List This window is used to view unauthorized devices that have been blocked by IP-MAC binding restrictions. To view this window, click Security > IP-MAC-Port Binding (IMPB) > MAC Block List as shown below: 211