Linksys WRT1900ACS router setup

Linksys WRT1900ACS router setup is very easy and you can do it in 2 different ways easily on your own. WRT1900ACS is a Dual-Band Wi-Fi Router   (2.4 + 5 GHz). It delivers a stronger connection at a wider range than a single band at speeds up to AC1900. Equipped with a four-antenna configuration, the router provides exceptional signal strength and range. Advanced users also have the option of modifying the router with open source firmware. The WRT1900ACS has four Gigabit Ethernet ports that are perfect for transferring large media libraries at speeds 10X faster than Fast Ethernet. To stream or send large files across your network at high speed, simply connect a flash drive to the USB 3.0 port or an external SATA storage device to the eSATA port. The eSATA port also serves as a USB 2.0 port.



We will discuss about Linksys WRT1900ACS router setup with or without CD or installation software.

Linksys WRT1900ACS Router setup

2 Different methods for Linksys WRT1900ACS router setup.

We will discuss both the methods step by step

First Method: Install the router manually.

Using web interface of the router, we can install this router manually by opening Linksys router setup page and change the settings manually like other WRT series older routers. And I think this is very simple process.

Second Method: Setting up WRT1900ACS router using the Smart Setup Wizard.

Setting up the Linksys Smart Wi-Fi Router is made easy using the Smart Setup Wizard.  It is embedded in the firmware and is available even if the router does not have an Internet connection or is in its default settings.

Linksys WRT1900ACS router setup without CD or manually.

Step 1: First make sure that your modem is working. Connect your main computer directly to the modem. Make sure that your main computer is able to access Internet directly through the modem. If you are not able to access internet directly through the modem then contact your service provider and get your modem working first.

In case of DSL connection, you may not be able to access the Internet directly through the modem. In this case you must have PPPoE User name and password from the DSL company. Make sure that you have the correct PPPoE user name and password. if you do not have PPPoE user name and password then get in touch with your Internet service provider and get it.

Step 2: Connect the computer and modem to the Linksys router with the Ethernet cable. Connect the modem to the Internet port (which is standing alone ) and computer to the Ethernet port. If you connect the modem and computer to the wrong port, you will not be able to open the Linksys router setup page. If you have computer connected to the WAN port then it will not communicate with the Linksys router. Connection is very important. You will see 4 lights, Power, WAN, wireless and Ethernet.


Linksys WRT1900ACS Router setup

Linksys WRT1900ACS router setup : Connections video


Step 3: Open browser and in the address bar type the number . This is the default IP address of almost all the models. However you can open the command prompt and check the IP address on your computer.


router password screen

Enter your Router Password then click Log in. The default password is admin. If you have changed it, enter the new password instead. If the default password is not working then you can reset the device to the factory default. Press and hold the reset button for 10 seconds. Release the reset button and wait for 30 seconds. Power cycle the router.

You will see the Linksys WRT1900ACS router setup page on your screen.

Linksys WRT1900ACS router setup page

Step 4: In the left panel, you will see all the options required to change the settings. Click on “Connectivity” under router settings section.

Step 5: Click On Internet settings tab at the top.

Now according to your internet service provider, you can change the Internet connection settings.

Please check the images below for appropriate Internet service provider settings. There will be 2 types of ISPs.  Cable ISP and DSL ISP.

For Cable ISP

You need to clone the MAC address of your computer, as shows in the image below. Then power cycle the network.

Cable Internet service provider


You need to enter the PPPoE user name and password as shown in the image below.

DSL Internet connection type

Once you change the Internet connections, you wired computer will be able to access the Internet through the WR1900ACS router.

Step 6: Change the Wireless network Settings as shown in the image below.

As this is a Dual band router, you will see 2 different wireless networks.

SSID is the name of the wireless network. Change both SSIDs. Keep the names of both the SSIDs different so that you can identify them. Change the password for the wireless network. ( remember this password J ) . This will be the password of the wireless network and you will need this password / key when you will try to connect any wireless computer or device to the network.

This is all about basic steps for Linksys WRT1900ACS router setup. You can also create Guest network using this web base interface. In the left panel you will settings options. Now try to connect different computer or wireless devices to the network and see if that works.



Linksys WRT1900ACS router setup using the Smart Setup Wizard.

Requirements before setting up your router

The following requirements should be met to avoid any problems during the setup:

  • Browser requirements for the router setup and Linksys Smart Wi-Fi access:
    • Microsoft Edge™
    • Internet Explorer® 8 or higher
    • Latest version of Chrome™ and Firefox®
    • Safari® (for Mac® or iPad®)
    • Latest Adobe Flash® Player?
  • Materials for setup – You should have the following items:
    • Linksys Smart Wi-Fi Router
    • One (1) or two (2) Internet / Ethernet (RJ-45) cables
    • A wireless computer or a computer with an Ethernet port
  • Active Internet connection – To check if you are able to access the Internet, connect the modem to the computer using an Ethernet cable as shown in the image below:

If you do not have modem then connect the cable (also called a patch or a fiber optic cable) provided by your Internet Service Provider (ISP) directly to the computer’s Ethernet port.

Step 1:

If your router came with external antennas, connect the antennas to the router first and then plug in the router to a power source.  If your router has a power switch, make sure that the power switch is set to the | (ON) position.  Wait until the power LED is solid.

Step 2:

Connect the Ethernet cable from your modem to the Internet port of the router.

Step 3:

Connect to your secured wireless network.  You can locate the wireless credentials either at the bottom of the router or on the Quick Start Guide.  To prevent any problems during setup, make sure you have a good signal from the router or bring the wireless computer closer to the same room as the router.

NOTE:  If you are using a wired computer, skip Step 3 and proceed to Step 4.

Step 4:

Launch your web browser and enter “” in the Address bar then press [Enter].

Step 5:

Tick the checkbox beside I have read and accepted the License Terms for using this software then click Next to proceed.

If the Smart Setup screen does not show up, press the Reset button at the back of the router for 10 seconds, turn the router OFF and then turn it back ON.  Wait a few seconds for the router to boot up and start at Step 1 again.

If no Internet connection is detected, the Your Internet cable is not connected correctly window will appear.  Follow the suggested troubleshooting steps on the screen to resolve your connection problem then click Next.

Follow the instructions and configure the router using the setup wizard.

2 comments on “Linksys WRT1900ACS router setup

  1. Linksys WRT1900AC Loses Wifi Connectivity
    I have a WRT1900AC, and every 1-2 weeks, it seems to lose wifi connectivity. No device can consistently connect to either the 2.4 or 5 GHz network consistently and get an internet connection, but the devices connected via ethernet are just fine. Sometimes switching between the 2.4 and 5 GHz networks allows for a few minutes of internet connectivity before the connectivity drops. The device can still be connected to the network officially, but there is no internet connection. I have hard reset it multiple times, uploaded the newest firmware via ethernet (it was already updated), and even tried to set it to a stable channel, but the only thing that works is rebooting the router. However, it doesn’t seem like we should have to reboot it every 1-2 weeks. Any other ideas?

  2. wrt1900acs router not working.
    I cannot get the wrt1900ac to connect to the internet. Cable modem connecting to PC over either yellow or orange or blue cable. PC set to DHCP. No problem. wrt1900ac NOT involved. ADD wrt1900ac to the situation: unplug the cable from the PC, turn off modem for 5 minutes, then plug modem/cable into wrt1900ac. Turn on wrt1900ac. Internet light goes blinking orange, then blinking white, then blinking orange, then blinking white, then solid orange. FAIL.

Leave a Reply

Your email address will not be published.