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RSTP is completely interoperable with STP. Switches running RSTP and switches running STP can be on the same network and work together to detect and break loops in the network.
Interoperability is achieved by the ability of RSTP to detect the presence of bridges running STP and to operate in common-spanning-tree mode. When an RSTP bridge is connected to an STP bridge and receives STP bridge protocol data units (BPDUs), the RSTP bridge sends only STP BPDUs out the port that is connected to the STP bridge. If a bridge running STP receives RSTP BPDUs, the STP bridge drops the RSTP BPDUs.
You can also manually set the P580 or P882 to run common Spanning Tree.
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