IFS NS3502-8P-2S User Manual
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Disabled
– the port only responds to network management messages and must return to the
blocking state first
A port transitions from one state to another as follows:
From initialization (switch boot) to blocking
From blocking to listening or to disabled
From listening to learning or to disabled
From learning to forwarding or to disabled
From forwarding to disabled
From disabled to blocking
Figure 4-7-1:
STP Port State Transitions
You can modify each port state by using management software. When you enable STP, every port on
every switch in the network goes through the blocking state and then transitions through the states of
listening and learning at power up. If properly configured, each port stabilizes to the forwarding or
blocking state. No packets (except BPDUs) are forwarded from, or received by, STP enabled ports until
the forwarding state is enabled for that port.
