# opa-arptbl-tuneup

Adjusts kernel ARP/neighbor table sizes for very large subnets based on configured IPv4/IPv6 network interface netmask values. Normally executes once on boot by `opa.service`; however, `opa-arptbl-tuneup` can be invoked with user discretion for a changed subnet configuration.

Note: Must execute as `root`.

## Syntax

    opa-arptbl-tuneup [start | stop | restart | force-reload | status]

## Options

`--help`

  Produces full help text.

`start`

  Adjusts kernel ARP table size.

`stop`

  Restores previous configuration.

`restart`

  Stops then starts.

`force-reload`

  Stops then starts. (Identical to `restart` option.)

`status`

  Checks if original table size was changed.