This appendix describes the steps for using the advanced internal diagnostic tools of the Model RT328/RH348 router. These tools can be used to troubleshoot ISDN and PPP connection problems. Several basic tests can be found in the menus of the internal Manager interface, while the more advanced protocol and packet trace tools are accessible from the command line interface.
The Diagnostic Process
Many router connection problems can be diagnosed using the ISDN and Remote Node connection tests in the Internal Manager Interface of the Model RT328/RH348 router. These tests can be found in Menu 24.4, System Maintenance (Diagnostic). Detailed information about using this menu can be found in Chapter 9, “System Maintenance.”
To begin problem diagnosis:
1.Execute test 4, the ISDN Connection test, from Menu 24.4.
This test performs a data loopback call from one B channel to the other. This call serves as a
basic test of your ISDN line. If this test fails, verify the ISDN hardware connection, the status of your line, and the information entered in Menu 2, ISDN Setup.
2.Try test 5, placing a Manual Call to a Remote Node.
This test will display some basic progress information that may be sufficient to determine the problem.
If these tests are not sufficient to diagnose a problem, you can run the more advanced protocol and packet trace tools. These tools consist of an embedded ISDN protocol analyzer and a PPP packet trace. The output of these trace tools can be captured to a file, which can then be faxed or sent by
Using the Protocol Analyzer and Trace Tools |