Xerox KS-801 operation manual Port Number, Path Cost, Port Status, Priority

STP (Spanning Tree Protocol) Port Status

Port Number	The LAN port ID
Path Cost	The Spanning-Tree Protocol uses port path costs to
	determine which port to select as a forwarding port.
	You should assign lower numbers to ports attached
	to faster media (such as full duplex), and higher
	numbers to ports attached to slower media. The
	possible range is 1 to 65535. The recommended path
	cost is 1000 ¡Ò LAN speed in megabits per second.
Priority	The port (physical or logical) with the lowest priority
	value has the highest priority and forwards the
	spanning-tree frames. The possible priority range is 0
	through 255 (decimal). The default is 128. If all ports
	have the same priority value, the lowest port number
	forwards the spanning-tree frames.
Port Status	Ports which are enabled can be in one of the follow-
	ing states:
	Listening : Switches send messages to one another
	to establish the network topology and the optimal
	paths to the different segments of the network. Other
	data is not transmitted.
	Blocking : The switch enters the Blocking State if a
	path with higher priority is found to exist during the
	Listening State. Normal data is not transmitted.
	Learning : The switch enters the Learning State if no
	path with a higher priority is found during the
	Listening State. Learned entries are entered in the
	Unicast Destination Forwarding Table. Normal data
	is not transmitted.
	Forwarding : The switch enters the Forwarding State
	after having been in the Learning State for a pre-
	defined time period. Normal data is transmitted.

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