MSTP (Multiple Spanning Tree Protocol) uses the same port states as RSTP (Listening, Learning, Forwarding, and Blocking).
In the Extreme Networks MSTP implementation, the listening state is not truly implemented as FDB (forwarding database) learning cannot be done when the port is not in the forwarding state. Ports in the blocking state listen but do not accept ingress traffic, perform traffic forwarding, or learn MAC source address; however, the port receives and processes BPDUs.
For more information about all of the STP (Spanning Tree Protocol) port states, see STP States.
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