Nintendo Switch Error Code 2110-2005 — What It Means & How to Fix It

What Does This Error Mean?

Error 2110-2005 on the Nintendo Switch typically indicates a NAT type compatibility problem. NAT (Network Address Translation) determines how your router handles online game connections. A strict NAT type (Type C or D) blocks or limits multiplayer connections. Changing your router settings to improve NAT type usually resolves this error.

Affected Models

Nintendo Switch
Nintendo Switch Lite
Nintendo Switch OLED

Common Causes

Your router has a strict NAT type that blocks direct connections to other players
The router's UPnP (Universal Plug and Play) feature is disabled, preventing automatic port opening
Two routers on the network (double NAT) are making the connection path too complex
The Nintendo Switch is behind a firewall that is blocking required ports
The router's firewall security settings are too aggressive for online gaming

How to Fix It

Check your Switch's NAT type. Go to System Settings > Internet > Test Connection. After the test completes, note the NAT Type shown. Type A or B is good. Type C or D causes 2110-2005.

NAT Type A means full connectivity. Type D means very restricted — most multiplayer connections will fail.
Enable UPnP on your router. Log into your router's admin panel (usually 192.168.1.1) and look for UPnP in the settings. Enable it and save. Then run the Switch connection test again.

UPnP automatically opens the ports that games need. It is the easiest way to improve your NAT type without manual port configuration.
Check for double NAT. If your ISP provides a modem-router combo AND you have your own separate router, you have double NAT. Put the ISP device in bridge mode to remove one layer of NAT.

Double NAT creates two layers of address translation, which almost always results in NAT Type C or D. Removing one router resolves it.
Assign a static IP to the Switch and set up port forwarding. In your router, reserve an IP for the Switch's MAC address. Then forward ports 1-65535 UDP to that IP (or specifically: UDP 1-65535 is the Nintendo requirement).

This is more involved but provides the most consistent NAT Type A or B result.
As a last resort, put the Switch in the router's DMZ. In the router admin panel, find DMZ settings and enter the Switch's IP address. This bypasses all firewall restrictions.

DMZ removes all firewall protection for the Switch. Only use this if other options fail and your home network is secure.

When to Call a Professional

Error 2110-2005 is a router configuration issue. You do not need a technician. All fixes involve adjusting settings in your router's admin panel. If you are not comfortable changing router settings, ask your ISP for help enabling UPnP or DMZ.

Frequently Asked Questions

What is NAT type and why does it affect online gaming?

NAT (Network Address Translation) is how your router converts your home network's private IP addresses into the public internet address. Different NAT strictness levels affect how easily your gaming device can connect to others. NAT Type A: Open — connects to everyone. NAT Type B: Moderate — connects to most players. NAT Type C or D: Strict — limited connections, frequent errors.

Will improving NAT type fix lag in online games?

It can help. A strict NAT type forces connections through relay servers instead of direct peer-to-peer connections. Relay servers add latency (ping/lag). Improving to NAT Type A or B allows direct connections which are faster and more stable. However, distance to game servers is also a major factor in lag.

My roommate uses the same router and has no NAT type issues. Why do I?

NAT type affects the whole network, not individual devices. If your roommate's device shows a better NAT type, they may be using UPnP more successfully or their specific game has less strict requirements. Check UPnP status on the router — it should be enabled. If double NAT is the issue, everyone on the network is affected, but some games handle it better than others.