Hello guys;

Suddenly my 9400 reported "Command failure' (no further explanation). I found out that the commands from the 9400 didn't reach the RFC 9400 extender. There was no reason for it: no network/configuration/PEP-changes, only minor adjustments in some images.
Also the Extender Discovery Tool in PEP didn't find the extender altough the extender was fully functioning.
Solution: turn exender off and on, replace the axtender-firmware and the Pront- connection is established again! However, the Extender Discovery Tool still cannot find the extender...

What can I do to avoid this problem in the future?

Thanks, greetings, Rudy