Upgrade from master to 17.01

just upgraded to SNAPSHOT, r3189-12db207 and noticed, that there is a 17.01 Snapshot now.
Is it possible to sysupgrade to 17.01-SNAPSHOT and keep the config?

Yes, that is possible. Sysupgrading is possible to both directions between master and 17.01

There are not many critical differences between 17.01 and master, so far. (For some routers there are changes in LED definitions etc., but those are rather minor points.)

thx, it worked i'll give it a try.