User`s guide

8-port Gigabit Ethernet Switch User’s Guide
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• From learning to forwarding or to disabled
• From forwarding to disabled
• From disabled to blocking
Figure 5-6. 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.
Default Spanning-Tree Configuration
Feature Default Value
Enable state STP enabled for all ports
Port priority 128
Port cost 19
Bridge Priority 32,768
Table 5-9. Default STP Parameters