Configure Ethernet interfaces
Digi TransPort User Guide 174
The RSTP port states are:
Role Description
Learning The port does not yet forward frames but it does learn source
addresses from frames received and adds them to the MAC
address table. The port processes BPDUs.
Forwarding The port receiving and sending data, normal operation. STP still
monitors incoming BPDUs that would indicate it should return
to the blocking state to prevent a loop.
Discarding A port that would cause a switching loop, no user data is sent or
received but it may go into forwarding mode if the other links in
use were to fail and the spanning tree algorithm determines the
port may transition to the forwarding state. BPDU data is still
received in blocking state.
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