Internet & modems

IPv6 connectivity problems

Some websites or apps may fail to load or behave oddly specifically due to IPv6 misconfiguration, and disabling IPv6 temporarily is a common diagnostic step, though most home users don't need to manage it directly.

Difficulty
Advanced
Time
15–30 minutes
DIY cost
$0
Pro cost
$0–$80

Symptoms

  • Specific websites or services fail to load while most others work fine
  • Network diagnostic tools report IPv6 connectivity issues
  • Problem resolves when IPv6 is disabled on the router or device
  • Gaming or specific apps show connectivity errors referencing IPv6

Likely causes

  • CommonISP's IPv6 implementation has a temporary issueSince IPv6 is a newer, and sometimes less mature, part of many providers' networks, occasional glitches on their end can affect specific sites or services.
  • CommonRouter's IPv6 configuration is inconsistent with what the ISP expectsIPv6 setup varies more between routers and ISPs than the well-established older IPv4 standard, leading to more configuration mismatches.
  • PossibleA specific website or service has poor or broken IPv6 support on their endEven with your network working fine, the destination site's own IPv6 setup can be the actual point of failure.

What to do

  1. If a specific site or service is failing, try disabling IPv6 on your device's network adapter settings temporarily to see if that resolves the immediate issue.
  2. If disabling IPv6 on one device fixes it, the more thorough fix is to check the router's IPv6 settings and either disable IPv6 there network-wide, or ensure it's configured to match what your ISP provides.
  3. Restart the router after making any IPv6 setting change.
  4. Check your ISP's support documentation for their recommended IPv6 configuration for your specific router model.
  5. Test the previously failing website or service again after the change.
  6. If disabling IPv6 resolves the issue and you don't have a specific need for it, it's reasonable to leave it disabled, since most home internet use works fine on IPv4 alone.
  7. If you do need IPv6 for a specific reason (like a work VPN or software requirement), contact your ISP for their correct IPv6 configuration settings rather than leaving it disabled long-term.

Tools and parts

  • Access to router's admin page

When to call a pro

If specific services fail only with IPv6 enabled and disabling it isn't a good long-term option for your needs, your ISP's support team can help find the correct IPv6 configuration for your equipment.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.