Network · low

How to fixIPV6-CONNECTIVITY-FAIL

IPv6 connectivity failure

What this error means

IPv6 connectivity failure is a low-severity network adapter issue. The system has no IPv6 connectivity while IPv4 functions normally. Modern applications and services increasingly require IPv6 (Microsoft services, Google, gaming platforms). IPv6 failure causes slow connection initiation as apps fall back to IPv4, and some services may be inaccessible or degraded. Windows shows 'No Internet access' for IPv6 in Network Status. See the troubleshooting steps below for the fix.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Enable IPv6 on router if available

Enable IPv6 on router if available.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Contact ISP about IPv6 support

Contact ISP about IPv6 support.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Reset IPv6 stack with netsh

Reset IPv6 stack with netsh.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Router not supporting IPv6
  • ISP not providing IPv6
  • Windows IPv6 stack misconfiguration