RSTP-TEst Package for ROuterboard 500 ?

Is there any available ?

yes…

Install ‘routeros’ or ‘all’ packages, than enable rstp-test package,
‘system package enable rstp-bridge-test’, and reboot router.

Is there any info on using RTSP on Mikrotik?

Every time we enable RSTP it takes down our bridge and we loose all connectivity.

We have to remove the rstp-bridge-test package to get he system online again…

SMA

What do you mean with loose connectivity?
Can you ping/mac-ping the using after enabling the package?
Could you make the support output file at that moment when it doesn’t work correctly and send it to support@mikrotik.com

This happened to me also, running on some x86 computer systems.
The only way to get them back up was to mac telnet to them(because they are on top of towers there was no console access), and remove the rstp package. Regular winbox/telnet/ssh was all down only mac telnet would work, and was very slow.
I would really like to use the rstp!