Appendix A Troubleshooting
Problem Solving
Table | Interpreting Environmental Reporting Features |
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Symptom |
| Possible Cause | Corrective Action | |
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The router operates at an | There is a fan failure. | Take corrective steps. For | ||
abnormally high temperature. | There is an air conditioner | information about environmental | ||
The following message appears | operating conditions, see the | |||
failure in the room. | ||||
on the console screen: | System Specifications, page | |||
The air flow to cooling vents is | ||||
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blocked. |
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detected OVERTEMPERATURE |
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condition. Please resolve |
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cooling problem immediately! |
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Troubleshooting Cables, and Connections
Network problems can be caused by a cable or cable connection, or external device such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. See Table
Table | Troubleshooting Cables, and Connections |
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Symptom |
| Possible Cause | Corrective Action |
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The router is experiencing | The router does not boot | Check the router chassis or | |
network problems. | properly. | software. For warranty | |
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| The router constantly or | information, refer to the Cisco |
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| Information Packet publication | |
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| intermittently reboots. | |
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| that shipped with your router or | |
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| contact customer service. |
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| The router boots, but the console | Verify that the parameters for |
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| screen is frozen. | your terminal are set as follows: |
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| (a) The terminal should have |
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| the same data rate as the |
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| router (9600 bps is the |
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| default). |
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| (b) 8 data bits. |
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| (c) No parity generated or |
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| checked. |
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| (d) 2 stop bits. |
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| The router powers on and boots | There may be a problem with the |
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| only when a particular cable is | module or cable. For warranty |
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| disconnected. | information, refer to the Cisco |
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| Information Packet publication |
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| that shipped with your order or |
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| contact customer service. |
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Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
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