...

I can tell you which line to change in the source code if you want to try.

Yes please

In MibIISw.java, change line 275 from:

if (!nb.getSysname().startsWith(netboxSysname)) {

to:

if (!nb.getSysname().trim().toLower().startsWith(netboxSysname.trim().toLower())) {

Then recompile gDD and let me know if it helps.

-- Kristian