Why create a static entry in the Arp table?



  • When setting a static IP address for hosts on the network, there is an option for "Create an ARP Table Static Entry for this MAC & IP Address pair", sometimes I have checked it, sometimes I haven't. But I have never known whether it's best to check or not check it.

    Searching the forums and interwebs isn't telling me anything about why having pfsense create this static list is a good thing or not. What, if at some point I need to change the static definition of that host? I am assuming the table would be updated.

    In short, what are the benefits to choosing this option?



  • @madivad said in Why create a static entry in the Arp table?:

    When setting a static IP address for hosts on the network, there is an option for "Create an ARP Table Static Entry for this MAC & IP Address pair", sometimes I have checked it, sometimes I haven't. But I have never known whether it's best to check or not check it.

    Searching the forums and interwebs isn't telling me anything about why having pfsense create this static list is a good thing or not. What, if at some point I need to change the static definition of that host? I am assuming the table would be updated.

    In short, what are the benefits to choosing this option?

    The only time I had to set up static arp was to configure some security cameras. Until the initial configuration was set up, it was necessary to use a static arp to map to the IP address to be used.


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