Panderine:

Supply the following if possible:

• Device problem occurs on
• Software versions of LEDE release, packages, etc.
• Steps to reproduce

I want to add a custom ARP entry but ip neigh command doens't do anything:

ip neigh add 192.168.1.254 lladdr ff:ff:ff:ff:ff:ff nud permanent dev br-lan

I get:

BusyBox v1.25.1 () multi-call binary.

Usage: ip [OPTIONS] {address | route | link | rule} {COMMAND}

ip [OPTIONS] OBJECT {COMMAND}
where OBJECT := {address | route | link | rule}
OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }
root@Glassgate:~# ip neighbour
BusyBox v1.25.1 () multi-call binary.

Usage: ip [OPTIONS] {address | route | link | rule} {COMMAND}

ip [OPTIONS] OBJECT {COMMAND}
where OBJECT := {address | route | link | rule}
OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }