Planet Technology WGSW-24040R, SGSW-24040R user manual Priority, Edge, Point2Point

		User’s Manual of WGSW-24040 / WGSW-24040R
		SGSW-24040 / SGSW-24040R
		path cost ports are chosen as forwarding ports in favor of higher path cost ports.
		Valid values are in the range 1 to 200000000.
•	Priority	Controls the port priority. This can be used to control priority of ports having
		identical port cost. (See above).
		Default: 128
		Range: 0-240, in steps of 16
•	Edge	Controls whether the port is known to connect directly to edge devices. (no
		Bridges attached). The Edge flag is cleared by receipt of any BPDUs on the port.
		Transitioning to the forwarding state is faster for edge ports than for other ports.
		(This applies to physical ports only. Aggregations are always Non-Edge).
•	Point2Point	Controls whether the port connects to a point-to-point LAN rather than a shared
		medium. This can be automatically determined, or forced either true or false.
		Transitions to the forwarding state is faster for point-to-point LANs than for
		shared media.
		(This applies to physical ports only. Aggregations are always forced Point2Point).

By default, the system automatically detects the speed and duplex mode used on each port, and configures the path cost according to the values shown below. Path cost “0” is used to indicate auto-configuration mode. When the short path cost method is selected and the default path cost recommended by the IEEE 8021w standard exceeds 65,535, the default is set to 65,535.

Port Type	IEEE 802.1D-1998	IEEE 802.1w-2001
Ethernet	50-600	200,000-20,000,000
Fast Ethernet	10-60	20,000-2,000,000
Gigabit Ethernet	3-10	2,000-200,000

Table 4-7-1Recommended STP Path Cost Range

Port Type	Link Type	IEEE 802.1D-1998	IEEE 802.1w-2001
Ethernet	Half Duplex	100	2,000,000
	Full Duplex	95	1,999,999
	Trunk	90	1,000,000
Fast Ethernet	Half Duplex	19	200,000
	Full Duplex	18	100,000
	Trunk	15	50,000
Gigabit Ethernet	Full Duplex	4	10,000
	Trunk	3	5,000
	Table 4-7-2Recommended STP Path Costs

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