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You are here: Home / SWITCH / Module 4 / Advanced STP – RSTP Port States

Advanced STP – RSTP Port States

Unlike the 802.1D standard, RSTP defines only three distinct port states for a port under STP control. Table 4-1 below lists these three states, compares them to the port states defined in the 802.1D standard, and provides a brief description of their behavior:

Table 4-1. Comparison between 802.1D and 802.1w Port States

802.1D State
802.1w State
Default Port Operational Status
Port in Active Topology?
Port Learning MAC Addresses?

Disabled
Discarding
Enabled
No
No

Blocking
Discarding
Enabled
No
No

Listening
Discarding
Enabled
Yes
No

Learning
Learning
Enabled
Yes
Yes

Forwarding
Forwarding . . .

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