If Mario Kart World connects your Switch 2 to the internet but won’t join a match—or disconnects as one starts—run the console’s connection test first. Check the NAT type, download and upload speeds, then change one network condition at a time and test again. A successful internet test does not guarantee peer-to-peer matchmaking will work: restrictive NAT, latency, or the other player’s network can still prevent a connection.
First, identify what is failing
There are two different problems that can look alike. If the console cannot connect to the internet or Nintendo services, check the local connection and whether Nintendo has listed an outage or maintenance. If the console is online but cannot find or join a match, focus on NAT, latency, and the network path between players. Nintendo’s matchmaking guidance is aimed at players who can get online but cannot join matches or are often disconnected when matches start: Nintendo’s matchmaking troubleshooting.
As an Amazon Associate I earn from qualifying purchases.
| What you see | What to check first |
|---|---|
| The Switch 2 connection test fails, or other online services also fail | Check the home internet connection, restart network equipment, and check Nintendo Network Status if an error code indicates a possible service issue. |
| The console is online, but matchmaking fails with everyone | Record the connection test’s NAT type and speeds; investigate local Wi-Fi or wired conditions and the router/modem setup. |
| Only one friend or player cannot connect | Ask that player to run the same checks. Nintendo notes that the other player’s NAT and network conditions can affect a peer-to-peer connection. |
| The match starts, then disconnects | Check NAT and latency, and test whether the problem changes on a different network or with a particular player. |
Keep track of whether other online functions work and whether the failure involves one person or every player. That distinction helps tell a local network problem from a connection that fails only between particular players.
Before changing anything, note the exact error code and when it appears: while connecting to Nintendo services, searching for a match, joining another console, or after a race begins. Also note whether you are using Wi-Fi or a wired connection. Those details make it easier to compare results and avoid treating every online error as the same fault.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Check the game requirements and Nintendo service status
Mario Kart World online play requires a Nintendo Switch Online membership, and each player should have updated game software. Confirm both before changing router settings. Nintendo lists these requirements in its Mario Kart World multiplayer guidance.
If the error code is in the 2321-0000 to 2321-9999 range, Nintendo recommends checking its Network Status page for an outage or maintenance and retrying after service is restored. Its general guidance also recommends restarting the console and troubleshooting NAT when online matches fail consistently: Nintendo’s support for error codes 2321-0000 to 2321-9999. That range is not specific to Mario Kart World. A service interruption and a problem with your home network require different fixes, so don’t assume a local fault while Nintendo services are unavailable.
Check the live status rather than relying on an old report or assuming that a particular game is down. If Nintendo lists maintenance or an outage, retry once service is restored before making network changes. If the console’s internet test succeeds and other online services work, but the game still cannot connect to players, continue with matchmaking-specific checks.
Run the Switch 2 connection test
- Open the test: From the HOME Menu, go to System Settings → Internet → Test Connection.
- Record the results: Note the NAT type, download speed, and upload speed. Take another reading after each change so you can tell whether it helped.
- Interpret the result: Nintendo prefers NAT A for peer-to-peer communication; NAT B works with most other NAT types. A restrictive NAT or high latency can still prevent a match even if the console reaches the internet and the displayed speeds seem adequate.
- Use the speed branch as a diagnostic: Nintendo’s matchmaking flow uses 3 Mbps download as a threshold for its troubleshooting branch. It is not a guarantee of playability: speed alone does not determine whether a peer-to-peer connection will complete.
Nintendo explains the A/B distinction and connection-test troubleshooting in its matchmaking support article. A fast test result is useful information, not proof that every other player or network can connect to yours.
Use the test as a baseline, not just a pass/fail check. Write down whether the result changes after moving closer to the router, restarting equipment, switching from Wi-Fi to wired, or trying another network. If speed is below Nintendo’s 3 Mbps diagnostic threshold, follow the branch in Nintendo’s matchmaking guidance; do not assume a higher speed by itself will resolve a restrictive NAT or high latency.
Download and upload measurements also do not tell the whole story. Nintendo specifically warns that high latency may cause matchmaking to time out even when NAT and speeds look acceptable. If the test results are similar before and after a change, but matches remain unreliable, compare the same player and connection conditions again rather than making several settings changes at once.
What NAT types mean for matchmaking
For peer-to-peer play, the connection depends on both players’ network environments. A restrictive NAT on either side can prevent the two consoles from establishing a match. Nintendo’s NAT troubleshooting for Switch 2 and Switch describes these types as compatibility clues:
Recommended Free Tools
| NAT type | What Nintendo’s guidance indicates | What to do |
|---|---|---|
| A | Preferred for peer-to-peer communication. | If you have A but one player still cannot connect, have that player check their own connection; the issue may be on their side or in the route between the networks. |
| B | Compatible with most other NAT types. | Check for latency or a peer with a stricter NAT if matchmaking still fails. |
| C | May have difficulty connecting to users with stricter NAT types. | Follow Nintendo’s NAT troubleshooting for your modem/router arrangement, then test again. |
| D | Poor for peer-to-peer connections; generally able to connect only with A. | Investigate the household modem/router setup using Nintendo’s guidance. |
| F | Unable to complete peer-to-peer communication. | Use Nintendo’s NAT troubleshooting to investigate the network arrangement, and rerun the test after any change. |
These results do not identify one universal router setting that will fix every home connection. The right options depend on how the modem, router, and internet service are arranged. Make one change at a time and retest instead of applying several changes at once; otherwise, it is difficult to know what affected the result.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
NAT is best read as a compatibility clue, not a rating of overall internet quality. A and B are generally more favorable for peer-to-peer communication, while C, D, and F can limit which other networks can connect. Even an A or B result cannot guarantee that a particular match will work, because the other console’s network and the latency of the connection matter too.
If the displayed NAT type is restrictive, follow Nintendo’s instructions for the actual modem and router arrangement in your home. A setup with more than one network device can differ from a single-router arrangement, and an ISP may also affect peer-to-peer connections. Avoid copying a random router setting from another household: the same change may not apply to your equipment and could disrupt other devices or services.
Troubleshoot a wireless connection
If the console is using Wi-Fi and the connection test does not point to a clear NAT problem, test the wireless conditions. Nintendo’s suggestions are experiments, not guaranteed fixes:
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute- Try a closer, undocked test: Remove the Switch 2 from its dock and test within 10–15 feet (about 3–5 metres) of the router. This helps check whether the wireless path or placement is contributing to the problem.
- Reduce possible interference: Move metal objects and electronics that may interfere away from the router and console.
- Test IPv6 off: Nintendo suggests trying to turn off IPv6 in the saved network’s settings. This is not a universal recommendation; if disabling it creates other problems, restore the previous setting.
- Restart network equipment: Power-cycle the modem and router, reconnect the console, and run the connection test again.
After each experiment, retry the same matchmaking situation if possible—for example, with the same player—so the before-and-after comparison is useful. If the test result does not change and the connection still fails, move on rather than repeating the same adjustment.
The 10–15-foot test is useful because it changes distance and placement without requiring a purchase. Keep the console undocked and near the router for the test, then compare the connection-test results and the same matchmaking attempt. If performance improves, placement or wireless conditions may be contributing; if nothing changes, continue to the other checks rather than assuming the router needs replacement.
Likewise, treat the IPv6 suggestion as a temporary diagnostic. Change only that setting, test, and restore it if it makes other network activity worse or does not help. The goal is to isolate a condition, not to apply every suggested adjustment permanently.
Troubleshoot a wired connection
On Switch 2, wired internet requires the console to be docked. Nintendo’s wired troubleshooting includes restarting the modem and router, connecting directly to the modem to isolate other network devices, and trying another Ethernet cable to check whether the existing one is faulty.
- Power-cycle the modem and router, then test the connection again.
- If your setup permits it, connect the dock directly to the modem temporarily. This helps isolate whether another network device is involved; follow your provider’s or equipment manufacturer’s instructions for reconnecting afterward.
- If the connection still fails, try a different Ethernet cable to determine whether the current cable is damaged or no longer working.
- Rerun System Settings → Internet → Test Connection after each change and compare the NAT type and speeds.
A new cable is relevant if you need one for a wired test or your existing cable proves faulty. Nintendo’s guidance does not establish buying a cable, router, or Wi-Fi extender as a general fix for online matchmaking.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Direct-to-modem testing is an isolation step, not a required permanent configuration. If you try it, reconnect your regular network devices according to the modem or provider instructions afterward. Compare one result at a time: if the test changes only when a different cable is used, the old cable may be faulty; if it changes when another device is bypassed, investigate that part of the setup.
Wired and wireless are useful to compare, but neither connection method automatically fixes NAT or latency. A wired test can help determine whether Wi-Fi conditions are involved; it cannot prove that every peer-to-peer connection will succeed. The relevant question is whether the issue changes under otherwise similar conditions.
When one player or one network is the problem
If you can play with other people but not one specific friend, ask that person to run the Switch connection test and check their NAT type, speeds, and connection method. Nintendo says another player’s network can be part of the cause, so repeatedly changing your own setup may not help.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Error 2618-0513 can point to an internet service, speed, or NAT condition that is not suitable for peer-to-peer matchmaking. Nintendo also cautions that mobile hotspots and 5G networks may prevent peer-to-peer connections. Retry, check NAT, and, if practical, test another network: Nintendo’s guidance for error 2618-0513.
If you see 2618-0514, Nintendo displays the message: “Unable to connect to the other console(s). Please try again later.” Nintendo says the code generally means multiple players had a suboptimal network connection during matchmaking. Restrictive NAT, latency, or an internet service type not recommended for peer-to-peer play may be involved. Its guidance suggests trying another network, preferably cable, DSL, or fiber: Nintendo’s guidance for error 2618-0514. The support page covers Switch and Switch 2 games generally; this is not a Mario Kart World-exclusive code.
A different network is a useful diagnostic if it is available: if matchmaking works there, the original connection or its provider may be restricting or disrupting peer-to-peer traffic. If it fails in the same way with only one player, ask that player to test too.
Use the pattern of failures to decide who should investigate next. If every opponent or friend fails, start with the local network and router/modem arrangement. If only one particular player fails while other matches work, compare your two connection tests and have that player check their network. If a household switches between Wi-Fi, wired, or another internet connection and the error changes, record which condition changed; that is more useful than changing several settings together.
A mobile hotspot or 5G connection is not a reliable workaround for every peer-to-peer problem. Nintendo warns these network types may prevent peer-to-peer connections. For the 2618-0514 scenario, Nintendo suggests trying a different network, preferably a cable, DSL, or fiber connection. Treat that as a diagnostic recommendation, not a guarantee that switching providers or buying hardware will solve the problem.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
When to contact the ISP or equipment maker
- Another network works: Contact your internet service provider about possible peer-to-peer restrictions on the original connection, particularly if the issue persists with otherwise stable service.
- The problem appears tied to the router: Ask its manufacturer about firmware updates or a factory reset. Before resetting, follow the manufacturer’s instructions and record any custom settings you may need; a reset can erase them.
- A direct modem connection still fails and other devices are affected: Nintendo recommends contacting the ISP.
A factory reset is an escalation step, not a first diagnostic. If service status is clear and the console is online, first collect the connection-test results and narrow down whether the issue follows one player, Wi-Fi, or the network equipment.
When contacting the ISP or equipment maker, explain what you tested: whether the Switch 2 reaches the internet, the NAT type and speeds shown, whether wired or Wi-Fi changes the result, whether another network works, and whether other devices are affected. This gives support a more specific starting point than simply reporting that Mario Kart World will not matchmake. If you consider a factory reset, save or record custom network settings first and follow the manufacturer’s procedure.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Online matchmaking is not the same as LAN Play
Mario Kart World’s LAN Play is a separate local wired mode, not a fix for online matchmaking. Nintendo says it supports 2–24 players, with up to two players per console. Its setup requires Switch 2 consoles and docks, the game, Ethernet cables for each player or pair, a television or monitor, and a wired router. A network switch may be needed if the router does not have enough LAN ports; all consoles must connect through the same shared router. The Switch 2 must be docked for wired internet. See Nintendo’s Mario Kart World multiplayer instructions for the setup details.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →That equipment list applies to a LAN Play setup. It is not a shopping list for ordinary online play. For a typical matchmaking failure, start with the free connection test and the network checks above; consider a cable only if you need one for a wired test, to replace a faulty cable, or to build a LAN Play setup.
For LAN Play, plan around the number of consoles and available LAN ports. Nintendo specifies an Ethernet cable for each player or pair and says a network switch may be needed if the shared wired router does not have enough ports. All consoles must use that same router, and each Switch 2 needs to be docked for wired internet. A television or monitor is also part of Nintendo’s listed setup. These are LAN requirements, not minimum purchases for playing online with other people over the internet.
Use the results to choose your next step
- Connection test fails: Troubleshoot the internet connection first; matchmaking cannot work reliably until the console is online.
- NAT is C, D, or F: Follow Nintendo’s NAT guidance for your modem/router setup, changing one thing at a time.
- NAT and speeds look acceptable, but Wi-Fi matchmaking is unstable: Try Nintendo’s placement, interference, IPv6, and restart checks, then compare the new test.
- Only one player fails: Have that player repeat the same checks before changing more of your own setup.
- The problem follows the original internet connection: Ask the ISP about peer-to-peer restrictions; involve the equipment maker if the evidence points to the router.
- You intended to play locally over cables: Set up LAN Play separately using Nintendo’s requirements rather than treating it as an online-matchmaking fix.
A practical troubleshooting log can be short: record the error code, connection method, NAT type, download and upload speeds, which player or players were affected, and the one change made before each retest. This keeps the process manageable and helps you see whether the problem follows the console, the local network, or a particular peer.
Frequently Asked Questions
Why can Mario Kart World matchmaking fail if my Switch 2 internet test succeeds?
The console’s internet test confirms it can reach the internet, but peer-to-peer matchmaking also depends on NAT compatibility and latency. The other player’s network can affect the connection too, so a successful test does not guarantee that every match will complete.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Which NAT type is best for Mario Kart World online matches?
Nintendo says NAT A is preferred for peer-to-peer communication and NAT B works with most other NAT types. C can have difficulty with stricter NAT types, D is generally able to connect only with A, and F cannot complete peer-to-peer communication. Check both players’ conditions when only one match fails.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
What should I do about error 2618-0514?
Nintendo’s player-facing message is “Unable to connect to the other console(s). Please try again later.” The code generally means multiple players had a suboptimal network connection during matchmaking. Check NAT and latency, and if possible try another network; Nintendo recommends cable, DSL, or fiber for this scenario. The code is not exclusive to Mario Kart World.
Can a mobile hotspot or 5G connection cause matchmaking problems?
Yes. Nintendo cautions that mobile hotspots and 5G networks may prevent peer-to-peer connections. If practical, test another network, preferably a cable, DSL, or fiber connection for the 2618-0514 scenario.
Should I buy an Ethernet cable, router, or Wi-Fi extender to fix matchmaking?
Start with the free Switch 2 connection test and Nintendo’s troubleshooting steps. Nintendo’s guidance does not establish a new cable, router, or extender as a general matchmaking fix. An Ethernet cable is relevant if your existing cable is faulty, you want to test a wired connection, or you are setting up LAN Play.
Free tools Windows power users keep installed
One-click scans. No signup required.
What does Mario Kart World LAN Play require?
Nintendo says LAN Play supports 2–24 players, with up to two players per console. The setup uses Switch 2 consoles and docks, the game, Ethernet cables for each player or pair, a television or monitor, and a wired router. A network switch may be needed if the router lacks enough LAN ports, and all consoles must use the same shared router.
Do I need Nintendo Switch Online for Mario Kart World online play?
Yes. Nintendo lists a Nintendo Switch Online membership as a requirement for online play. Nintendo also says each player should have updated game software.
When should I contact my ISP or router manufacturer?
Contact the ISP if another network works and the original connection may be restricting peer-to-peer traffic, or if a direct modem connection still fails and other devices are affected. Contact the router manufacturer if the evidence points to the router; ask about firmware or reset steps, and record custom settings before a factory reset.
The Bottom Line
Start with the Switch 2 connection test, record NAT and speeds, and separate a service or internet failure from a peer-to-peer matchmaking problem. Then change one condition at a time—wireless placement, a wired test, or another player’s network—and retest. Nintendo Switch Online and updated software are required; buying networking hardware is not a default fix. Reserve Ethernet purchases for a faulty cable, a useful wired test, or a planned LAN Play setup.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsQuick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
