OpenWRT display devices on network in commandline and store to file

Question

I would like to display the devices, their IP & mac address via SSH into my OpenWRT flashed router is there a native method or is a package required? if so, which would be least labor intensive?

I'd use 'sed' to store these details as a txt file and have the script for that written already. (the easy part)

Answer 1

arp -n >> file location/file

or

arp -n > file location/file