如何检测 IPv6 连通性
本指南介绍多种检测网络是否支持 IPv6 连通性的方法。
方法一：在线检测（最简单）
访问 IP Lookup，页面会自动检测 IPv6 连通性，并在支持时显示你的 IPv6 地址，无需任何设置。
方法二：命令行
Windows
打开命令提示符（cmd）执行：
ping -6 2001:4860:4860::8888
或查看本机 IPv6 地址：
ipconfig | findstr "IPv6"
macOS / Linux
打开终端执行：
ping6 -c 4 2001:4860:4860::8888
或查看网卡：
ifconfig | grep inet6
Linux（另一种）
ip -6 addr show
或用 curl 测试：
curl -6 https://ip6.iohow.com/
方法三：浏览器测试
直接在浏览器访问 https://ip6.iohow.com/。若能看到 IP 地址，说明浏览器可访问 IPv6 服务器；若无法加载，则你的网络不支持 IPv6。
常见问题排查
- 检测失败但运营商支持：检查路由器设置，IPv6 可能在管理面板中被关闭。
- Windows 显示 IPv6"无 Internet 访问"：以管理员身份执行
netsh int ipv6 reset。 - macOS/Linux 无法获取 IPv6：检查路由器是否启用 DHCPv6 或 SLAAC。
- 移动网络：大多数 4G/5G 运营商自动提供 IPv6；若没有，检查 APN 设置。
How to Test IPv6 Connectivity
This guide covers multiple ways to test whether your network supports IPv6 connectivity.
Method 1: Online Test (Easiest)
Visit IP Lookup. The page automatically tests your IPv6 connectivity and displays your IPv6 address if available. No setup required.
Method 2: Command Line
Windows
Open Command Prompt (cmd) and run:
ping -6 2001:4860:4860::8888
Or check your assigned IPv6 address:
ipconfig | findstr "IPv6"
macOS / Linux
Open Terminal and run:
ping6 -c 4 2001:4860:4860::8888
Or check your interfaces:
ifconfig | grep inet6
Linux (alternative)
ip -6 addr show
Or test with curl:
curl -6 https://ip6.iohow.com/
Method 3: Browser Test
Visit https://ip6.iohow.com/ directly in your browser. If you see an IP address, your browser can reach IPv6 servers. If the page fails to load, your network does not support IPv6.
Troubleshooting
- IPv6 test fails but your ISP supports it: Check your router settings. IPv6 may be disabled in the router admin panel.
- Windows shows "No Internet access" for IPv6: Try running
netsh int ipv6 resetas Administrator. - macOS/Linux can't get IPv6: Check if your router's DHCPv6 or SLAAC is enabled.
- Mobile networks: Most 4G/5G carriers provide IPv6 automatically. If not, check your APN settings.
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