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Upgrading Cisco SG switch gets "illegal format"

Cisco Router, Firewall, VPN, SDM, ASA and Switch

Upgrading Cisco SG switch gets "illegal format"

Postby blin » Fri Nov 14, 2014 5:29 pm

Q: When attempting to upgrade our Cisco SG300 switch firmware, In "upgrade firmware from http", I choose the .ros file and try update, but get this message: "illegal format".
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Re: Upgrading Cisco SG switch gets "illegal format"

Postby blin » Fri Nov 14, 2014 5:39 pm

immediate upgrade to the latest firmware was not possible. an intermediate upgrade to newer bootloader 1.3.5, followed by an upgrade to firmware version 1.3.7 needs be completed prior to upgrading to latest firmware v1.4.0.88.
How to Configure and Troubleshoot Cisco
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Tablet and Smartphone Setup Guide
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blin
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Re: Upgrading Cisco SG switch gets "illegal format"

Postby blin » Fri Nov 14, 2014 5:40 pm

upgrade the boot loader first before attempting the firmware
How to Configure and Troubleshoot Cisco
http://www.howtocisco.com

Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com
blin
Site Admin
 
Posts: 3605
Joined: Wed Dec 31, 1969 7:00 pm
Location: Chicago, USA

Re: Upgrading Cisco SG switch gets "illegal format"

Postby blin » Fri Nov 14, 2014 5:43 pm

You need to carry out an interim firmware upgrade to the previous version. Then upgrade to 1.4.X.X. The switch flash file system was changed in 1.3.7.18
How to Configure and Troubleshoot Cisco
http://www.howtocisco.com

Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com
blin
Site Admin
 
Posts: 3605
Joined: Wed Dec 31, 1969 7:00 pm
Location: Chicago, USA


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