D-Link DES-3250TG manual Cost, Priority, Migration No, Edge No, P2P No

D-Link DES-3250TG Standalone Layer 2 Switch

connection to the network for the group. Redundant links will be blocked, just as redundant links are blocked on the switch level.

The STP on the switch level blocks redundant links between switches (and similar network devices). The port level STP will block redundant links within the STP Group.

The following fields can be set:

Parameter	Description
From and To	Consecutive groups of ports may be
	configured starting with the selected port.
State<Disabled>	Toggle to enable STP on the selected ports.
Cost	A Port Cost can be set from 1 to 200000000.
	The lower the number, the greater the
	probability the port will be chosen to forward
	packets.
	Default port cost:
	100Mbps port = 200000
	Gigabit ports = 20000
Priority	A Port Priority can be from 0 to 240. The
	lower the number, the greater the probability
	the port will be chosen as the Root Port.
Migration <No>	Select Yes or No. Choosing Yes will enable
	the port to migrate from 802.1d STP status to
	802.1w RSTP status. RSTP can coexist with
	standard STP, however the benefits of RSTP
	are not realized on a port where an 802.1d
	network connects to an 802.1w enabled
	network. Migration should be enabled (Yes)
	on ports connected to network stations or
	segments that will be upgraded to 802.1w
	RSTP on all or some portion of the segment.
Edge <No>	Select Yes or No. Choosing Yes designates
	the port as an edge port. Edge ports cannot
	create loops, however an edge port can lose
	edge port status if a topology change creates
	a potential for a loop. An edge port normally
	should not receive BPDU packets. If a BPDU
	packet is received it automatically loses edge
	port status. No indicates the port does not
	have edge port status.
P2P <No>	Select Yes or No. Choosing Yes indicates a
	point-to-point (p2p) shared link. These are
	similar to edge ports, however they are
	restricted in that a p2p port must operate in
	full duplex. Like edge ports, p2p ports
	transition to a forwarding state rapidly thus
	benefiting from RSTP.

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