D-Link xStack DGS-3120 Series - Page 347

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
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To view this window, click Security > IP-MAC-Port Binding (IMPB) > IMPB Port Settings as shown below:
Figure 8-26 IMPB Port Settings window
The fields that can be configured are described below:
Parameter Description
Unit
Select the unit you want to configure. (EI Mode Only)
From Port / To Port
Select a range of ports to set for IP-MAC-port binding.
ARP Inspection
When the ARP inspection function is enabled, the legal ARP packets are forwarded,
while the illegal packets are dropped.
Disabled - Disable the ARP inspection function.
Enabled (Strict) - This mode disables hardware learning of the MAC address. All
packets are dropped by default until a legal ARP or IP packets are detected. When
enabling this mode, the Switch stops writing dropped FDB entries on these ports. If
detecting legal packets, the Switch needs to write forward FDB entry.
Enabled (Loose) - In this mode, all packets are forwarded by default until an illegal
ARP packet is detected.
The default value is Disabled.
IP Inspection
When both ARP and IP inspections are enabled, all IP packets are checked. The
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.
ND Inspection
Use the drop-down menu to enable or disable the ND inspection of the specified
ports.
Protocol Use the drop-down menu to select the protocol. Available options are: IPv4, IPv6 and
All.
Zero IP
Use the drop-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.