Because I’ll never remember how I did this!


As usual nothing is straight-forward ;)

TFTP Server

Luckily on MacOSX it’s built in :)

To enable it you will need to use the following command:

sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist

Note: the -F is because it is disabled by default.


Since you’re running a server make sure your firewall isn’t blocking you!


Note: I’ve found all the port (e.g. sg300–10 vs sg300–28p) and power (POE) variations to be the same firmware. For example, sg300–10 is the same as sg300–28p. YMMV

Warning: Firmware Format Changes!

If your firmware version is < (sh ver) then you need to upgrade to that first as there was a change in both the firmware and boot formats! If you don’t you will see the following error in the web console:

entry already exists in the Copy History table…

And the following in the CLI or logs:

%TFTP-A-TftpTxERROR: An error message was sent: 0

Then shell onto the switch and copy the firmware over:

Note: While I love the new web interface on these switches I still do this CLI.

switch# copy tftp://A.B.C.D/sx300_fw-1413.ros image

Finally, you will need to activate the new image and reboot the switch:

switch#sh bootv
Image  Filename   Version     Date                    Status
-----  ---------  ---------   ---------------------   -----------
1      image-1    12-Jan-2014  18:02:59   Active*
2      image-2     29-Mar-2015  16:24:16   Not active
switch#boot system image-2


You’re running a server and your firewall is probably disabled…FIXIT!

TFTP Server

To shutdown on MacOSX use the following:

sudo launchctl unload /System/Library/LaunchDaemons/tftp.plist


Close any ports opened in Prerequisites; above.


This blog post is just a combination of the following: