Planet GS-5220 Series User Manual page 227

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.
2. STP Parameters
STP Operation Levels
The Switch allows for two levels of operation: the switch level and the port level. The switch level forms a
spanning tree consisting of links between one or more switches. The port level constructs a spanning tree
consisting of groups of one or more ports. The STP operates in much the same way for both levels.
On the switch level, STP calculates the Bridge Identifier for each switch and then sets the
Root Bridge and the Designated Bridges.
On the port level, STP sets the Root Port and the Designated Ports.
User's Manual of GS-5220 LCD Series
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