SonicWALL 5.8.1 Manuale Utente

The Static ARP feature allows for static mappings to be created between layer 2 MAC 
addresses and layer 3 IP addresses, but also provides the following capabilities:

Publish Entry - Enabling the Publish Entry option in the Add Static ARP window causes 
the SonicWALL device to respond to ARP queries for the specified IP address with the 
specified MAC address. This can be used, for example, to have the SonicWALL device 
reply for a secondary IP address on a particular interface by adding the MAC address of 
the SonicWALL. See the Secondary Subnet section that follows.

Bind MAC Address - Enabling the Bind MAC Address option in the Add Static ARP 
window binds the MAC address specified to the designated IP address and interface. This 
can be used to ensure that a particular workstation (as recognized by the network card's 
unique MAC address) can only the used on a specified interface on the SonicWALL. Once 
the MAC address is bound to an interface, the SonicWALL will not respond to that MAC 
address on any other interface. It will also remove any dynamically cached references to 
that MAC address that might have been present, and it will prohibit additional (non-unique) 
static mappings of that MAC address.

Update IP Address Dynamically - The Update IP Address Dynamically setting in the 
Add Static ARP window is a sub-feature of the Bind MAC Address option. This allows for 
a MAC address to be bound to an interface when DHCP is being used to dynamically 
allocate IP addressing. Enabling this option will blur the IP Address field, and will populate 
the ARP Cache with the IP address allocated by the SonicWALL's internal DHCP server, 
or by the external DHCP server if IP Helper is in use.

The Static ARP feature allows for secondary subnets to be added on other interfaces, and 
without the addition of automatic NAT rules.