Nintendo Switch 2110-3127

On screen: Error Code: 2110-3127 — unable to connect to the internet

What it actually means

The console's connection test failed at name resolution or reachability. Usually the saved network profile carries a manual DNS entry that no longer answers, or the router hands out a DNS server the Switch cannot use, or the console associates with Wi-Fi but cannot reach Nintendo's connectivity-check endpoint.

It also turns up with MTU problems and on routers that force secure DNS.

How to tell which one you have

If your phone on the same Wi-Fi has working internet but the Switch test fails, it is the console's network profile. If nothing on the network works, it is your ISP. Nintendo Switch Online outages produce different codes entirely — 2618-xxxx for communication faults and 2124-xxxx — so this one is never the sign of a Nintendo outage.

Fixes, in the order worth trying

1. Set DNS back to Automatic — System Settings, Internet, Internet Settings, pick your network, Change Settings, DNS Settings, Automatic. Nintendo points at this first and it is most often the cause.
2. If Automatic fails, set DNS manually to 1.1.1.1 or 8.8.8.8
3. Delete the saved network and add it again — Clears a stale profile, which no amount of restarting will.
4. Restart the console properly — Hold Power for three seconds, Power Options, Restart. Sleep mode is not a restart.
5. Power-cycle the router and move closer to it — Nintendo suggests being within three to four metres during testing.
6. Set MTU to between 1400 and 1500 — Under Change Settings. Fixes the cases where the test gets partway and stops.
7. Wired connections need a USB LAN adapter — The dock has no Ethernet port of its own.
8. On hotel or dorm Wi-Fi with a sign-in page — The Switch generally cannot get through a captive portal at all. Test with a phone hotspot.

Operator documentation: en-americas-support.nintendo.com. Nintendo's page is current and covers both Nintendo Switch and Nintendo Switch 2.

Common questions