How to create a subinterface on a Cisco router

Set up router

Router setup steps

Step 1: Decide where to place the router

The best place for a wireless business router is an open area in the workplace as it will give you even coverage. However, sometimes it is not easy to find an open area because you need to connect the router to a broadband gateway from your Internet Service Provider (ISP), which is usually connected to a cable near an outside wall.

Step 2: Connect to the Internet

Connect the router with a cable or opt for a mesh router

To solve the "long distance" problem when connecting a router, you can use a CAT5e or CAT6 cable to connect the router to the Ethernet port on the ISP gateway. Another option is to run Ethernet cables through the walls of your office to the selected central location of the router.

Another option is to install a mesh network with a router. In a mesh network, you can have multiple Wi-Fi transmitters in your home or office that are all on the same network. Unlike repeaters, which can be used with any wireless router, mesh networks require a router that has this feature built in.

Whichever option you choose, you will be using a standard Ethernet cable that plugs into the router's wide-area network (WAN) or Internet port. The color of the Internet port usually differs from the other ports.

Check the LEDs on the router

The LEDs on your router tell you whether you have successfully established an active Internet connection. If you don't see any lights confirming such a connection, make sure you've plugged the cable into the correct port.

Test the connection with a device

Make sure your router has a working connection by plugging a laptop into one of the device ports on the back of the router. If all goes well, you should be able to establish a wired connection, just as you would when checking an active internet connection.

Step 3: Configure the wireless router gateway

In some cases, ISPs offer customers gateways with built-in routers. In most cases, these combined devices are not designed for corporate environments, nor do they have the additional ports, security features, and other options that allow you to add services and expand networks as your business grows.

If you have a gateway with a built-in router, you will need to configure the gateway to disable the router and pass the WAN IP address - the unique Internet protocol address that the ISP assigns to your account - and all network traffic to your new router become.

If you don't do this step, you run the risk of conflicts that can cause the devices to not function properly. You may need to contact your ISP to help you with this step.

Step 4: Connect the gateway to the router

First turn off the gateway. If an Ethernet cable is already plugged into the local area network (LAN) port of the gateway, remove the cable and plug it into the WAN port on your router. Turn the gateway back on and wait a few minutes for it to start. Plug in the router's power cord and turn it on. Then wait a few minutes again.

Step 5: use the app or web dashboard

The easiest way to proceed with router setup is to use a mobile app, if the router manufacturer provides one. If there is no app, or if you want to use the router's web-based dashboard instead, connect the router to a computer with an ethernet cable.

If necessary, you can find the IP address of the router on the back of the device. If not, enter, a commonly used router address, into the browser's search bar.

Step 6: create a username and password

To configure the router, you must log in using the router's default administrator name and password. You can usually find this information on the router itself or in the user manual that came with it.

Next, enter the required credentials. Once you have logged in, you should immediately create a new username and password. The default values ​​are usually something like "admin" and "password1234" which is of course not secure - so change them as soon as you get the chance.

Step 7: update the router's firmware

Your router may need an update of the "firmware" or software with which it is operated. Update it as soon as possible because the new firmware may fix bugs or introduce new security measures.

Some routers can automatically download new firmware, but many others cannot. You may need to check for updates through the app or browser interface.

Step 8: create a Wi-Fi password

Most routers come with not only pre-set admin usernames and passwords, but also pre-set Wi-Fi usernames and passwords. You will likely be prompted to change your Wi-Fi username and password, but even if you don't see such a prompt, plan to do so quickly.

Step 9: Use automatic configuration tools whenever possible

If your router has automatic installation features, use them to complete the setup. For example, you should be able to use auto-configuration to manage IP addresses using Dynamic Host Configuration Protocol (DHCP), which automatically assigns IP addresses to devices. You can always change these addresses later.

Step 10: set up your security

Many router manufacturers offer security features to protect the network and user privacy. You can log in to the web dashboard and activate security functions such as firewall, web filters and access controls to protect yourself from harmful data traffic. You can also set up Virtual Private Networks (VPN) to protect your privacy.