Error Code: 2306-0811
You are unable to connect to an online service and you receive the error code 2306-0811.
If you are receiving this error code, it likely indicates the service you are attempting to use is undergoing maintenance.
What to Do:
Review https://www.nintendo.co.jp/netinfo/en_GB/index.html for the most up-to-date maintenance and server status information, and then try again after the posted maintenance has ended.
Power cycle the modem and router being used, and then try again.
Manually enter an alternate DNS, and then try again.
Situation Not Resolved:
If the error persists, and there is no notice of maintenance, wait a while and try again later.