Cisco 3800 Series Integrated Services Routers Troubleshooting TechNotes - Cisco Systems

Hierarchical Navigation

HOME
- SUPPORT
  - PRODUCT SUPPORT
    - ROUTERS
      - CISCO 3800 SERIES INTEGRATED SERVICES ROUTERS
        TROUBLESHOOT AND ALERTS
        Field Notices
        Password Recovery
        Security Advisories, Responses and Notices
        Troubleshooting Guides
        Troubleshooting TechNotes

Some links below may open a new browser window () to display the document you selected.

Basic Concepts and Maintenance
- "%Error opening tftp://255.255.255.255/network config" Error Message Prevention
  03/Aug/2006
- Back up and Restore Configuration Files
  03/Aug/2006
- Buffer Tuning for all Cisco Routers
  28/Nov/2008
- Capturing Text Output from Hyperterminal
  25/Jun/2008
- DSP on NM-HDV2 Functionality Verification for 2600XM/2691/2800/3700/3800 Platforms
  20/Jul/2006
- How to Protect Your Network Against the Nimda Virus
  06/Mar/2008
- How to Upgrade from ROMmon Using the Boot Image
  27/Jan/2006
- IPsec Troubleshooting: Understanding and Using debug Commands
  15/Jul/2009
- Maximum Number of Interfaces and Subinterfaces for Cisco IOS Routers: IDB Limits
  24/May/2012
- NM-1M-OC3-POM Watermark CLI
  01/Nov/2006
- Performance Tuning Basics
  11/Jul/2007
- Prevent "Translating. domain server (255.255.255.255)" Messages after an Invalid Command is Entered on a Router
  02/Aug/2006
- Problems Caused by Simultaneous Access to Router NVRAM
  03/Aug/2006
- Reset a Cisco Router to Factory Default Settings
  02/Aug/2006
- TCP and UDP Small Servers
  01/Aug/2006
- Understanding the Definition of bits per second (bits/sec) from the show interfaces Command Output
  01/Aug/2006
- Understanding the Ping and Traceroute Commands
  29/Nov/2006
- Using Network-Based Application Recognition and ACLs for Blocking the "Code Red" Worm
  02/Aug/2006
Boot Failure Recovery and IOS upgrade
- How to Choose a Cisco IOS Software Release
  26/Mar/2010
- How To Copy a System Image from One Device to Another
  02/Aug/2006
- How to Download a Software Image to a Cisco 2600 via TFTP Using the tftpdnld ROMMON Command
  06/Dec/2006
- ROMmon Recovery for the Cisco 3600/3700/3800 Series Routers
  13/Sep/2006
- Standard Break Key Sequence Combinations During Password Recovery
  02/Aug/2006
- TFTP Server Selection and Use
  02/Feb/2006
- Why Does My Router Lose Its Configuration During Reboot?
  25/Jun/2008
- Xmodem Console Download Procedure Using ROMmon
  01/Feb/2006
Cables and Specifications
- Auxiliary Port, Console Port, And Adapter Pinouts For Cisco 1000, 1600, 2500, 2600, And 3600 Series Routers
  27/Jan/2006
- CAB-X21 MT and CAB-X21 FC Serial Cable Specifications
  21/Nov/2006
- CAB-530 MT Serial Cable Specifications
  27/Jan/2006
- CAB-449 MT and CAB-449 FC EIA/TIA-449 Serial Cable Specifications
  30/Jan/2006
- CAB-232 MT and CAB-232 FC EIA/TIA-232 Serial Cable Specifications
  30/Jan/2006
- CAB-25AS-FDTE Adapter Technical Specifications
  30/Jan/2006
- CAB-25AS-MMOD Adapter Technical Specifications
  27/Jan/2006
- Cabling Guide for Console and AUX Ports
  03/Sep/2006
- Cisco Cable Product Numbers, Part Numbers, and Descriptions
  01/Aug/2006
- Ethernet AUI Port, Pinouts, and Cable Specifications
  30/Jan/2006
- Ethernet 100BaseTX and 10BaseT Cables: Guidelines and Specifications
  01/Aug/2006
- How to Connect a KG-84A to a Cisco Serial Interface
  01/Aug/2006
- Serial Cable Connection Guide
  01/Aug/2006
- 5-in-1 EIA/TIA-449 Assembly and Pinouts
  01/Aug/2006
- 5-in-1 EIA/TIA-232 Assembly and Pinouts
  04/Mar/2008
- 5-in-1 V.35 Assembly and Pinouts
  18/Dec/2007
- 5-in-1 X.21 Assembly and Pinouts
  04/Mar/2008
High CPU Utilization
- Dealing with mallocfail and High CPU Utilization Resulting From the "Code Red" Worm
  20/Jun/2008
- High CPU Utilization in Exec and Virtual Exec Processes
  12/Dec/2008
- The show processes Command
  06/Mar/2009
- Troubleshooting High CPU Utilization Due to Interrupts
  29/May/2008
- Troubleshooting High CPU Utilization due to Processes
  29/Sep/2008
- Troubleshooting High CPU Utilization in IP Input Process
  02/Aug/2006
- Troubleshooting High CPU Utilization on Cisco Routers
  24/Jul/2008
- What Causes %SYS-3-CPUHOG Messages?
  24/Jun/2008
Troubleshooting Hardware
- Cisco 3800 Series Router Hardware Troubleshooting
  28/May/2007
- Hardware Troubleshooting Index Page
  20/Oct/2006
- Processor Memory Parity Errors (PMPEs)
  31/Jan/2006
- SegV Exceptions
  31/Jul/2006
- Troubleshooting Buffer Leaks
  29/Nov/2006
- Troubleshooting Ethernet Collisions
  01/Aug/2006
- Troubleshooting Input Queue Drops and Output Queue Drops
  29/Jul/2008
- Troubleshooting Memory Problems
  28/Nov/2006
- Troubleshooting Router Interfaces and Modules Issues
  07/Dec/2006
- Troubleshooting Spurious Accesses, Alignment Errors, and Spurious Interrupts
  02/Aug/2006
- Troubleshooting the DSP on NM-HDV for Cisco 2600/3600/VG200 Series Routers
  15/Jan/2008
- Troubleshooting Watchdog Timeouts
  29/Nov/2006
Troubleshooting Router Hang and Router Crash
- Creating Core Dumps
  24/Jun/2008
- Less Common Types of System Crashes
  29/Nov/2006
- Retrieving Information from the Crashinfo File
  01/Feb/2006
- Troubleshooting Bus Error Crashes
  29/Nov/2006
- Troubleshooting Router Crashes
  28/Nov/2006
- Troubleshooting Router Hangs
  02/Aug/2006
- Understanding Software-forced Crashes
  31/Jul/2006
- What Causes a Router To Be Restarted By the Abort or Trace Trap Commands
  29/Nov/2006
Miscellaneous
- Analog Voice Port Best Match Impedance Setting Choice
  11/Oct/2006
- Clocking Configurations On Voice-Capable IOS-Based Platforms
  03/Aug/2006
- Configure Q.SIG PRI Trunks between Call Manager and Avaya S8700/G650 with Unity Voice Mail Integration
  20/Aug/2006
- Configuring ISL Trunks on Cisco Routers
  30/Aug/2005
- How to Route Calls to Cisco Unity AutoAttendant from an IOS Gateway
  27/Oct/2006
- Integrate the Cisco IOS Gateway to the MX/Alliance Turret via T1-CAS
  23/Jan/2007
- Most Common L2L and Remote Access IPsec VPN Troubleshooting Solutions
  28/Apr/2009
- Password Recovery Procedures
  17/Jan/2007
- Understand the NM-HDV2 IP Communications High-Density Digital Voice or Fax Network Module
  10/Aug/2006
- Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature
  31/Aug/2009
- Understanding Direct Inward Dial (DID) Voice Interface Cards
  08/Oct/2006
- Wireless LAN Controller Module (WLCM) Configuration Examples
  19/Feb/2007
- Wireless LAN Controller Module Troubleshooting
  30/Mar/2007
- Software Upgrade Procedure
  08/Feb/2007
- Understanding Queue Limits and Output Drops on Cisco IOS Software Platforms
  24/Sep/2009
- Unified Wireless Network: Troubleshoot Client Issues
  19/May/2009

News & Alerts

Technology Trends

Support

Communities

About Cisco

Programs