Troubleshooting Remote Access Networks (CCIE Professional Development)

This chapter illustrated the layer-by-layer troubleshooting techniques for ISDN. The main focus is to the remote user and the BRI. The systematic approach in this chapter enables you to enhance your knowledge about troubleshooting the most common ISDN solutions and includes information on the following:

• D channel Layer 1, Layer 2, and Layer 3 troubleshooting.

• The PPP protocol troubleshooting in its ISDN implementation. PPP phases and protocols, including PPP callback MLP and MMP protocols and their troubleshooting.

• Troubleshooting techniques for telephone interfaces.