I have never upgraded my RB450 (running 3.28 now) but have some issues that seem to be fixed with the newer releases.

I downloaded the routeros-mipsbe-5.7.npk file to my PC. Then I opened the FILES menu in Winbox. I dragged the npk file to the files, and confirmed that is was there from the terminal.

I rebooted and it is still running 3.28.

The I tried the same thing with The Dude, and told TD to update the router. Didnt work.

I tried the force update and that didnt work either.

Now what? Any ideas?

Is 3.28 before the 7->8 character license id key change? You may need to get an updated license...

What does this show:

software-id: "3J8U-1DQT"
old-software-id: "0760-LTT"
upgradable-to: v4.x
nlevel: 4
features:

Looking at the license print I am not sure, but one thing is the upgradable-to says v4 so does that mean I need something different?

That would be my guess. I think Normis would tell you to contact Mikrotik support.

See this thread where he suggests upgrading to 4.17 first and then to 5.7 http://forum.mikrotik.com/viewtopic.php?f=2&t=55152

(Dang how can a cut&paste get so scrambled? Fixed now...)

I did see that post already but the end of it the person was stuck at 100% CPU. I will send an email to support I guess and see if I need a new license.

That may be due to a specific DHCP bug in 5.7. Still worth a shot. Backup first so you can rollback and they try it.

1.Upgrade to 3.3 first
2.Do the licence update
3.Upgrade to 4.16 or 17
4.Upgrade to 5.xx
5.Upgrade firmware

just my 2c worth