Technical information

Troubleshooting Cisco 3900 Series, 2900 Series, and 1900 Series ISRs
Reading LEDs
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Cisco 2900 and 3900 Series Hardware Installation
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. The Cisco IOS software displays system error and recovery messages on an external device
console terminal screen.
The terminal should display one of the following prompts:
Router> (indicates the user EXEC command mode)
or
Router# (indicates the privileged EXEC command mode)
The Cisco IOS software checks the system condition once every 30 seconds. If a condition still exists,
the error message is displayed again; if the error condition has cleared, a recovery message is displayed.
Table 1 describes some of the most common system error and recovery messages.
Cisco.com Technical Support Web Site
The Cisco Technical Support Web site (www.cisco.com/techsupport) provides online documents and
tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco
Technical Support Web site is available 24 hours per day, 365 days per year.
For a complete overview of services go to:
http://www.cisco.com/web/services/ts/access/index.html
Table 1 System Messages
Error Message Explanation
%ENVMON-3-FAN_OK: Fan <fan-number>
functional now
Explanation:
The cooling fan within the chassis is working.
%ENVMON-3-FAN_FAIL: Fan <fan-number> is
malfunctioning
Explanation:
The cooling fan within the chassis is not working.
%CFG-3-CARD_NOT_SUPPORTED: Slot <n>. <Card
identification from cookie, including at
least card type, version, revision, and
serial number>
Explanation:
The card found is not recognized or is not
supported in the specified slot. Check the feature
license to be sure it is enabled.