"correct" method to add a static ARP entry

[rm4foe0r]

A user asked in 2022 what's correct way to add static arp entries to opnsense. They linked to an older discussion where users were adjusting static_arp_pairs configuration directly in /etc/rc, but as he pointed out this would be overwritten by opnsense future updates.

I wanted to clarify that since around January 2024 opnsense provides Neighbors menu that let's you insert such static permanent arp entries (applies after reboot).

I wanted to mention this as these posts seemed to score higher in internet search engines than the above documentation page, so I was hoping this post will get clumped with others and help out some future users.