Auto-DHCP-Option

A script to auto set Main Router's dhcp_option.

Introduction

Our network topology:

3 means Gateway's IP and 6 means DNS Server's IP.

But there is an problem: If our Side Router down, we can't connect to Internet.

So, this script will check Side Router status, if it is down, remove dhcp_option.

If Side Router is down, we can manually reconnect devices to Main Router, and use Internet normally.

Usage

Install

Run below command in Main Router.

wget https://raw.githubusercontent.com/WingLim/dotfiles/Auto-DHCP-Option/ado_init.sh
sh ado_init.sh init your_side_router_ip

Script will creat a dir name auto_dhcp_option and generate check_status.sh in it.

Add a cron to execu check_status.sh every 10 mins.

Remove

sh ado_init.sh remove

License

MIT