Interlogix NS3500-28T-4S User Manual - Manual (Page 149)

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4.6.3 STP Port Setting
This page allows you to configure per port STP settings. The STP Port Setting screens in Figure 4-6-6 & Figure 4-6-7
appear.
Figure 4-6-6 STP Port Configuration Page Screenshot
The page includes the following fields:
Object Description

Port Select Select port number for this drop down list.

External Cost (0 =
Auto)
Controls the path cost incurred by the port. The Auto setting will set the path
cost as appropriate by the physical link speed, using the 802.1D recommended
values. Using the Specific setting, a user-defined value can be entered. The
path cost is used when establishing the active topology of the network. Lower
path cost ports are chosen as forwarding ports in favor of higher path cost
ports. Valid values are in the range 1 to 200000000.

Edge Port Controls whether the operEdge flag should start as beeing set or cleared. (The
initial operEdge state when a port is initialized).

BPDU Filter Control whether a port explicitly configured as Edge will transmit and receive
BPDUs.
 BPDU Guard Control whether a port explicitly configured as Edge will disable itself upon
reception of a BPDU. The port will enter the error-disabled state, and will be
removed from the active topology.

P2P MAC 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.
Transition to the forwarding state is faster for point-to-point LANs than for
shared media.