Cisco Systems Modem UBR904 User Manual
Troubleshooting Tips for the  
Cisco uBR904 Cable Modem  
The following sections are provided:  
• Feature Summary on page 1  
• Prerequisites on page 3  
• Supported MIBs and RFCs on page 3  
• CMTS to Cable Modem Network Topology on page 4  
• Troubleshooting Tips on page 5  
• Command Reference on page 16  
• Debug Commands on page 42