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Troubleshooting Cisco 3900 Series, 2900 Series,

and 1900 Series ISRs

Part Number OL-20778-02

If you encounter problems with your Cisco integrated services router, the information in this document

can help you isolate problems in the router or eliminate the router as the source of the problem.

This document contains the following sections:

• Problem Solving, page 2

• Reading LEDs, page 5

• System Messages, page 5

• Network Professionals Connection (Net Pro), page 6

• Technical Notes, page 6

• Troubleshooting Toolkit, page 7

• Podcasts, page 8

• Text Messaging, page 8

• RSS Feeds, page 8

• Social Networking, page 9

Note To troubleshoot interface cards, refer to the documentation for the card on Cisco.com.

If you cannot locate the source of the problem, contact a Cisco customer service representative for

information on how to proceed. For technical support information, refer to “Obtaining Documentation

and Submitting a Service Request”. Before you call, have the following information ready:

• Chassis type and serial number

• Maintenance agreement or warranty information

• Type of software and version number

• Date you received the router

Summary of content (10 pages)

PAGE 1
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Part Number OL-20778-02 If you encounter problems with your Cisco integrated services router, the information in this document can help you isolate problems in the router or eliminate the router as the source of the problem.
PAGE 2
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Problem Solving • Brief description of the problem • Brief explanation of the steps you have taken to isolate the problem Problem Solving The key to problem solving is to isolate the problem to a specific subsystem by comparing what the router is doing to what it should be doing. The LEDs on the router aid you in determining router performance and operation. The LEDs are described in the “LED Indicators” (Cisco 3900/2900, Cisco 1900).
PAGE 3
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Problem Solving – If yes, the router is receiving power. The fan is connected directly to the DC outputs of the power supply. – If no, check the power source and power cable. • Does the router shut down after being on a short time? – Check for an environmentally induced shutdown. – Check the environmental site requirements in “General Site Requirements” (Cisco 3900/2900, Cisco 1900).
PAGE 4
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Jumper Settings – Check the router chassis or software. • Router boots, but the console screen is frozen. – Check the external console connection. – Verify that the parameters for your terminal are set as follows: (a) The same data rate as configured for the router (9600 baud is the default) (b) 8 data bits (c) 1 stop bit (d) No parity generated or checked • Router powers on and boots only when a particular card is removed.
PAGE 5
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Reading LEDs http://www.cisco.com/en/US/docs/routers/access/wireless/hardware/notes/antdip.html#wp1009743 Reading LEDs The LEDs enable you to determine router performance and operation. See “Chassis LED Indicators” (Cisco 3900/2900, Cisco 1900). System Messages This section describes system error and recovery messages that may appear when a Cisco 1941 router is operated.
PAGE 6
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Network Professionals Connection (Net Pro) In addition to the overview, you may wish to learn more about using the Technical Support and Documentation web site by viewing online presentations: http://www.cisco.com/web/learning/le31/le47/learning_tac_e-learning_tool_launch.html Network Professionals Connection (Net Pro) Access Net Pro on Cisco.
PAGE 7
Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Troubleshooting Toolkit Table 3 Technical Notes on Cisco.com (continued) Topic URL on Cisco.com Router Hangs http://www.cisco.com/en/US/products/hw/routers/ps359/products_te ch_note09186a0080106fd7.shtml Memory Problems http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products _tech_note09186a00800a6f3a.shtml High CPU Utilization http://www.cisco.com/en/US/products/hw/routers/ps133/products_te ch_note09186a00800a70f2.
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Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Podcasts Podcasts Table 5 Cisco Podcasts Podcast Language Podcast URL Unified Communications Podcasts Contact Center Solutions—audio English http://www.cisco.com/en/US/prod/voicesw/produc t_generic_contact_center_solutions_podcasts.html Products and Services Technology (audio) English http://www.cisco.com/en/US/products/products_te chnology_podcast_listing.html Government Podcasts—audio English https://www.cisco.
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Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Social Networking Social Networking Second Life Cisco has a large community on Second Life—Secondlife.com. Blogs Select from popular tags, or choose your own tag to search for specific blog posts that may help you. http://blogs.cisco.com/ Support Wiki A dynamic knowledge base where you can collaborate, create and access the latest technical content. Solve real-world IT problems in real time.
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Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs Social Networking Cisco 2900 and 3900 Series Hardware Installation 10