Use safely: Follow these steps only for a router or network you own or are authorised to manage. Never send Router Portal a router password, Wi-Fi key, MAC address, serial number or private screenshot.
Evidence and scopeSOURCE-BACKED · CHECK DATE
Sources2 official references
ScopeModel/OS/network dependent
CredentialsNever universal
ReviewRecheck after UI changes
Quick answer: IPv6 clients normally learn a default router through Router Advertisements; missing advertisements can leave a device with a link-local address but no usable path.
What this page covers
Compare IPv6 address, default route and DNS delivery on the same authorised network.
Step-by-step workflow
- Check whether the client has a global IPv6 address or only link-local.
- Inspect the IPv6 default route and router status.
- Compare another client and wired/Wi-Fi paths.
- Check ISP prefix delegation and router IPv6 mode before disabling IPv6.
Decision table
| Check | What it tells you | Safe next action |
|---|---|---|
| Link-local only | The client lacks a usable global path | Check RA and prefix delegation |
| Global address, no route | Default-router information is missing | Inspect router advertisements |
| IPv4 works, IPv6 fails | Dual-stack branch is isolated | Compare ISP/router IPv6 status |
Limits and verification
IPv6 menu names differ by vendor. Disabling IPv6 can hide rather than fix a provider or router configuration issue.
Official sources
- IETF RFC 8415 — DHCP for IPv6 (DHCPv6 behavior)
- Microsoft — Essential network settings and tasks (Windows network fields and commands)
Related Router Portal guides
Router login troubleshooting · Find the current gateway
Editorial note: This pilot page is written for one distinct question. Firmware, operating-system menus, ISP policies and regional radio rules can change, so confirm the source and exact device before applying a setting.