Troubleshoot IPv6–related problems

Use these tips to troubleshoot IPv6.

If you are using IPv6 for network connectivity, you can use several of the same troubleshooting tools as you do for IPv4. For example, tools such as trace route and Ping accept both the IPv4 and IPv6 address formats, so you can use them to test connections and routes for both types of networks. In addition, you can use the Netstat and communications trace functions for IPv6.

Remember these tips when troubleshooting problems that are specific to IPv6:

Ensure that your Ethernet line is configured and active. To check the status of lines that are configured on the server, follow these steps:
1. In iSeries™ Navigator, expand your iSeries server > Network > TCP/IP Configuration > Lines.
2. In the right pane, find the line that should be configured for IPv6 and check the Status column. If the line does not appear in the list, you must configure a line for IPv6 either by manually configuring interfaces on an existing line or by using IPv6's Stateless Address Autoconfiguration feature, or both.
If your Ping to an IPv6 address was unsuccessful, verify the address state of both interfaces. Both interfaces should have an address state of Preferred. If either the target or source interface is not in the preferred state, then either choose other interfaces for the test or change the interfaces being used to the correct status and address state. To verify the address state of the source interface, follow these steps:
1. In iSeries Navigator, expand your iSeries server > Network > TCP/IP Configuration > IPv6 > Interfaces.
2. In the right pane, right-click the IP address associated with the interface, select Properties, and select the Options page. This dialog allows you to view the preferred lifetime or valid lifetime for the interface. Repeat these steps to check the state of the target interface address.