Cannot upgrade firmware on CISCO SG200-50 switch (illegal format error)

[kirolosgamal1995@gmail.com]

Hi there,

I am trying to upgrade the firmware on a Cisco SG200-50 switch via HTTP/HTTPS

When I try and update the firmware to the latest version (1.4.11.5)

I am getting an "illegal format" error when I use HTTPS. The filename is sx200_fw-14115.ros and it was downloaded from the Cisco website at:

https://software.cisco.com/download/home/283771828/type/282463182/release/1.4.11.5

The switch firmware is at : 1.1.3.1

Can you let me know how to get the firmware to the latest version?

-Kirolos

[balaji.bandi]

You can not go directly to that final version you need to go with step upgrade.

1.3.7 and then 1.4X

[kirolosgamal1995@gmail.com]

I've already tried sx200_fw_1.3.7.18.ros and same problem happened .

[balaji.bandi]

Not sure if they have any version like trying 1.2X then 1.3 and 1.4

[kirolosgamal1995@gmail.com]

I have tried almost all versions

[balaji.bandi]

Not sure what went wrong  " "illegal format" " as per this error concern, the firmware not recognising.

i have seen people upgrading this forum as same issue, but upgrading to stepwise made them sucess.

worth reading this post :

https://community.cisco.com/t5/small-business-switches/cannot-upgrade-firmware-on-cisco-sg200-50-switch-illegal-format/td-p/3027553

https://serverfault.com/questions/622724/error-illegal-software-format-in-upgrade-fw-ros-file-of-cisco-sg200-26-small

[kirolosgamal1995@gmail.com]

ok 
many thanks