Have you returned home to play on your favourite console but can’t seem to get the errors to go away? The “A Communication Error Occurred” and error range “2-ARZNA-0001 to two-ARZNA-0009” has been one of the maximum common server troubles that players have encountered. If you are experiencing any of these problems, this is the guide for you. Here’s how to fix the Nintendo Switch server communication problem.
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Troubleshoot Nintendo Switch Server Communication Issues
These server problems might be caused by a broken DNS server, poor internet, wireless interference, or even an unstable WiFi network. While the problems are numerous, the solutions are few and simple to implement. You can easily resolve server difficulties by using the following solutions:
Restart your device.
Check for server issues.
Perform a speed test.
Upgrade your network equipment.
Is wireless interference present?
Change to a different band
Get as close to the router as feasible.
While some of these are self-explanatory, here is a more detailed explanation on how to proceed with the rest. These should help you get your Nintendo Switch server communication back up and running.

Examine Your Switch for Server Issues
If Nintendo is experiencing a problem, you can visit their server status page. If there is a problem, you must wait for it to be fixed before you can use your Switch again. If there are no issues, move on to the next solution.
Perform a Nintendo Switch Speed Test
You may occasionally encounter a problem as a result of internet speed issues. This could be due to a number of factors, including a router being overloaded with devices or simply having a sluggish internet day. Here’s how to check your internet speed on your Nintendo Switch to see what the problem is.
Turn your smartphone on.

Go to your Home Screen, select Internet, and then tap on Test Connection.
The system is now doing a speed test. You will now be able to see your device’s download speed. You will have problems playing your favourite games if your connection speed is less than 5Mbps. In this situation, you will need to disconnect some of the network-connected devices. The more the merrier. Even though this may be problematic if there are multiple people in the same location using the WiFi for different purposes.
Update Your Network Equipment
This solution considers renewing your modem or any other network equipment that provide internet access to your devices. Turn your router on and off to see if it refreshes your internet.

Is Wireless Interference Present?
The greater the distance between your device and the router, the worse the network will be. There could also be wireless interference from other things in the way. Some examples include walls, doors, and rain. To resolve this issue, simply move closer to the router and away from the things interfering with your gaming experience.
Change to a Different Band
You might have a dual-band router that can support two bandwidths at once. If you can change to one that operates at 5GHz. This should resolve the server communication error you’re experiencing while gaming.
This was our Nintendo Switch instruction on how to resolve the error codes “A Communication Error Occurred” and “2-ARZNA-0001 to 2-ARZNA-0009” on your Nintendo Switch.
People also ask
Why does my Switch report that it is unable to communicate with the server?
Why does my Nintendo Switch constantly reporting an error?
Why does Mario Kart constantly displaying a communication issue message?
Why isn’t my switch allowing me to connect to WiFi?
Causes of Nintendo Switch Wi-Fi Disconnection
Nintendo Switch Online and other services are unavailable. Your wireless network is unavailable. Your switch is no longer in range of the router. The security key on your network is incompatible.
How can I tell whether the data on my Nintendo Switch is corrupted?
Please follow the procedures below to verify your console for faulty data:
Select System Settings from the HOME Menu.
Select Data Management from the list of options on the left.
Select Manage Software on the right-hand side.
Choose Rocket League.
Check for Corrupt Data is selected.
How does one perform a hard reset on a Switch?
How to Perform a Nintendo Switch Hard Reset (Factory Reset)
Hold the power button while the system is turned off until the console resets. This manner can take in to 15 seconds.
Release the power button, then press it once more to restart the console.
Your console should boot up normally.
Is Switch capable of connecting to 5GHz Wi-Fi?
Is 5GHz Wi-Fi available? Yes, both 2.4GHz and 5GHz Wi-Fi are supported by Nintendo Switch consoles.
How do I re-establish DNS on the Nintendo Switch?
Select Settings from the Home Screen of your Nintendo Switch.
Navigate to “Internet” > “Internet Settings.”
Choose your Wi-Fi network and then click Change Settings.
Select “Manual.”
Select Primary DNS and press the B button to remove….
Change these to reflect the DNS server you’ve chosen.