Troubleshooting guide

Table of Contents
Cisco DSL Router Configuration and Troubleshooting Guide
Contact the Cisco Technical Assistance Center.....................................................................................72
PPPoE Online Form..............................................................................................................................73
Record Information from the ISP..........................................................................................................73
Record Information About Your Network.............................................................................................74
Choose Your Next Step.........................................................................................................................74
PPPoE: PC as a PPPoE Client – Troubleshooting.................................................................................75
Determine the Layer to Troubleshoot....................................................................................................75
Layer 1 Issues........................................................................................................................................75
Is the carrier detect (CD) light on the front panel of the Cisco DSL Router on or off?..................75
Is your ISP using a DSLAM that supports the Alcatel chipset?.....................................................76
Is the DSL port on the back of the Cisco DSL Router plugged into the DSL wall jack?...............76
Is the ATM interface in an administratively down state?...............................................................76
Is the cable pinout correct?..............................................................................................................76
Do you have the correct power supply for the Cisco 827?.............................................................77
Is the DSL operating−mode correct?..............................................................................................77
Is the circuit tested/provisioned correctly?......................................................................................77
Layer 2 Issues........................................................................................................................................77
Do you have the correct Permanent Virtual Circuit (PVC) values (VPI/VCI)?.............................77
Can you ping the default gateway from your PC?..........................................................................79
Is the bridge port in a forwarding state?..........................................................................................79
Is there an entry in the bridge table?...............................................................................................80
Related Information...............................................................................................................................80
Contact the Cisco Technical Assistance Center.....................................................................................81
Additional Information..........................................................................................................................81
Cisco DSL Router – RFC1483 Pure Bridging.......................................................................................82
Tasks to Perform....................................................................................................................................82
Configuration.........................................................................................................................................82
Troubleshoot Your Configuration..........................................................................................................83
Step−by−Step Configuration of RFC1483 Pure Bridging.....................................................................83
Step−by−Step Configuration.................................................................................................................83
Connect the Cisco DSL Router and Your PC.................................................................................83
Start and Set Up HyperTerminal.....................................................................................................83
Clear Existing Configurations on the Cisco DSL Router................................................................84
Configure the Cisco DSL Router....................................................................................................84
View Your Configuration................................................................................................................85
Configuration.........................................................................................................................................85
Troubleshoot Your Configuration..........................................................................................................86
RFC1483 Pure Bridging – Troubleshooting..........................................................................................86
Determine the Layer to Troubleshoot....................................................................................................86
Layer 1 Issues........................................................................................................................................87
Is the carrier detect (CD) light on the front panel of the Cisco DSL Router on or off?..................87
Is your ISP using a DSLAM that supports the Alcatel chipset?.....................................................87
Is the DSL port on the back of the Cisco DSL Router plugged into the DSL wall jack?...............87
Is the ATM interface in an administratively down state?...............................................................87
Is the cable pinout correct?..............................................................................................................88
Do you have the correct power supply for the Cisco 827?.............................................................88
Is the DSL operating−mode correct?..............................................................................................89
Cisco DSL Router Configuration and Troubleshooting Guide
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