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Community Member

router rebooted

Last night my cisco 2800 router rebooted/restarted automatically. Why does this happen.. how do I check the exact reason of rebooting. pls. tell the command to trace the reason.


Re: router rebooted


Show version will give you the reason what caused the reboot.



Community Member

Re: router rebooted

Sorry , but thr is no reason in show version.

Re: router rebooted


Can you please post the show version.


Mohammed Mahmoud.

Community Member

Re: router rebooted

here us sh version

------------------ show version ------------------

Cisco IOS Software, 2800 Software (C2800NM-ADVSECURITYK9-M), Version 12.3(14)T5, RELEASE SOFTWARE (fc2)

Technical Support:

Copyright (c) 1986-2005 by Cisco Systems, Inc.

Compiled Mon 24-Oct-05 21:43 by kellythw

ROM: System Bootstrap, Version 12.3(8r)T7, RELEASE SOFTWARE (fc1)

Sugal_KB uptime is 12 minutes

System returned to ROM by power-on

System restarted at 19:15:59 utc Fri Jun 29 2007

System image file is "flash:c2800nm-advsecurityk9-mz.123-14.T5.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

Cisco 2851 (revision 53.51) with 247808K/14336K bytes of memory.

Processor board ID FHK0950F11R

2 Gigabit Ethernet interfaces

31 Serial interfaces

4 Serial(sync/async) interfaces

1 Channelized E1/PRI port

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

125184K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

Re: router rebooted


This statement "System returned to ROM by power-on" indicates that it was a power issue, please check that the router power is stable and that the UPS is running fine if you are using one.


Mohammed Mahmoud.

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