You can troubleshoot the connection for devices that have Network Connection Status UI. This UI is enabled by the network connection status indicator utility, which is the Ethman application. This tool adds the IPv6 tab to the Network Connection Status dialog box. The tab contains IPv6 addressing information.
The IPv6 tab displays the default gateway and preferred addresses that are used on the interface. The default gateway is the address of the default router on the link. The following list describes the types of addresses:
Global. The preferred global unicast address used on the adapter.
Link-Local. The preferred link-local unicast address used on the adapter.
6to4. The 6to4 tunneling address that corresponds to the IPv4 address available on this device.
Auto tunnel. These are the global and link-local Automatic Tunnel Addressing Protocol (ISATAP) tunneling addresses that correspond to the IPv4 address available on the adapter.
Note
In certain circumstances, other address may be used. You can view a list of addresses by using the ipconfig or ipv6 command. For more information, see IPConfig or IPv6.
The Network Connection Status dialog box appears when you choose the system tray icon that corresponds to the network adapter with which to communicate. If more than one interface is running IPv6, the title bar of the network connection dialog box displays the interface adapter names.
Note The system tray is an area on the user interface that contains icons, which users can reference quickly for important information
Procedures
To Diagnose Connectivity Problems using the Network Connection Status UI
Choose the system tray icon that corresponds to the network adapter with which to communicate.
Choose the IPv6 tab.
If there is no IPv6 tab, the IPv6 protocol is not supported on the device or there was a fatal problem initializing the IPv6 software. No communication will occur over IPv6.
Use the information shown in the IPv6 tab and in the following table to troubleshoot the connection.
> [!NOTE]
> Fields on this tab may temporarily be unavailable while an interface is being initialized. It may be several seconds before the addresses are configured.
Problem Cause and Solution
Default Gateway address is unavailable Cause: This indicates that the IPv6 stack could not detect an IPv6 router on the network it is connected to. Solution: You can still achieve IPv6 connectivity by communicating directly with other IPv6 nodes on the connected network, or by tunneling over IPv4 using an Automatic Tunneling address.
6to4 field is unavailable. Cause: This indicates the 6to4 tunneling interface is not available. IPv6 communication will operate normally using other addressing mechanisms. This may be caused by not having a globally routable IPv4 address. Solution: Choose the IPv4 tab and verify that a global address is configured. Check with your network administrator if unsure whether the address is global.
Tunneling addresses is unavailable. Cause: This indicates automatic ISATAP tunneling is not available. This may indicate the network is not configured to support ISATAP, or the default ISATAP router name needs to be configured. Solution: IPv6 communication will operate normally using other addressing mechanisms. For information about configuring an ISATAP router name, see IPv6tun
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