FW Update

Backup current FW

dir flash:
copy flash:/c3560-ipbasek9-mz.122-55.SE12.bin tftp://192.168.28.199/c3560-ipbasek9-mz.122-55.SE12.bin

Upload new firmware:

! check free space:
show flash
dir flash:
copy tftp://192.168.28.199/c3560-ipbasek9-mz.150-2.SE11.bin flash:/c3560-ipbasek9-mz.150-2.SE11.bin
 
conf t
no boot
boot system flash:c3560-ipbasek9-mz.150-2.SE11.bin
exit
wr mem
reload

The upgrade path allows you to jump between versions. Keep in mind that the v15 train has a quite significant microcode patch. This will be installed during first boot and will give the impression the switch has hung. Keep a console cable connected to monitor the output. It will take between 20-30 minutes.

Idea is to upload missing firmware file using console cable and XModem transer.

apt install minicom
minicom -D /dev/ttyUSB0

! switch terminal to faster spped
set BAUD 115200
 
copy xmodem:c3560-ipbasek9-mz.150-2.SE11.bin flash:c3560-ipbasek9-mz.150-2.SE11.bin
 
! CTRL+A+Z and choose send file from minicom menu
! when transfer finishes:
 
unset BAUD
 
boot flash:c3560-ipbasek9-mz.150-2.SE11.bin