RSTP
Rapid Spanning Tree Protocol (IEEE 802.1w) supports connections to RSTP nodes
by monitoring the incoming protocol messages and dynamically adjusting the type of
protocol messages the RSTP node transmits If RSTP is using 802.1D BPDUs on a
port and receives an RSTP BPDU after the migration delay expires, RSTP restarts
the migration delay timer and begins using RSTP BPDUs on that port.