Re: Broadcast storm, loop, flood how to find from where the dissasters camming?

RSTP may have decided on a Root switch different from what it shold be.  Apparently, QFX should be Root.

Also, RSTP on Juniper is standard 802.1w [one instance] while Cisco is proprietary Rapid PVST+ [instance per VLAN]. Both are compabile. 

Thanks.