Upgrading IOS major revision on an older 2811 router

Answered Question
Aug 6th, 2010


After buying a new VWIC2 card, I've found out I need to update my IOS for it to be recognized.  My current "sh ver":


Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.3(11)T3, RELEASE SOFTWARE (fc4)

Technical Support: http://www.cisco.com/techsupport

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

Compiled Wed 26-Jan-05 02:49 by pwade

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

ROM: Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.3(8)T5, RELEASE SOFTWARE (fc2)

pl5-voice-gw uptime is 1 hour, 3 minutes

System returned to ROM by power-on

System restarted at 09:12:07 CST Fri Aug 6 2010

System image file is "flash:c2800nm-spservicesk9-mz.123-11.T3.bin"

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Cisco 2811 (revision 53.51) with 251904K/10240K bytes of memory.
Processor board ID FHK0848F0N7
2 FastEthernet interfaces
18 Serial interfaces
2 Channelized T1/PRI ports
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62592K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
Since 12.3 is not supported anymore, I need to switch to a 12.4 image.  What I'm looking at is c2800nm-spservicesk9-mz.12.4-24.T3.  Is there anything fancy to upgrading a major revision like this, beyond normal caution of a standard upgrade, or will this completely change items so that my current config will need to be reworked?
I have this problem too.
0 votes
Correct Answer by Jerry Ye about 6 years 2 months ago

No you should be fine. Save your original config and image in TFTP as backup.



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Correct Answer
Jerry Ye Fri, 08/06/2010 - 08:27

No you should be fine. Save your original config and image in TFTP as backup.




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