Interlogix NS3550-8T-2S User Manual - Manual (Page 130)

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4.7.4 CIST Port Configuration
This page allows the user to inspect the current STP CIST port configurations, and possibly change them as well. The CIST Port
Configuration screen in
Figure 4-7-6 appears.
Figure 4-7-6 : STP CIST Port Configuration Page Screenshot
The page includes the following fields:
Object Description

Port The switch port number of the logical STP port.

STP Enabled
Controls whether RSTP is enabled on this switch port, * means to select all ports
of Industrial Managed Switch.

Path Cost
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. All means all ports will have one
specific setting.

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
All
means all ports will have one specific setting.
 operEdge (state flag) Operational flag describing whether the port is connecting directly to edge
devices. (No Bridges attached). Transition to the forwarding state is faster for
edge ports (having operEdge true) than for other ports.The value of this flag is
based on AdminEdge and AutoEdge fields. This flag is displayed as Edge in
Monitor->Spanning Tree -> STP Detailed Bridge Status.
 Admin Edge Controls whether the operEdge flag should start as beeing set or cleared. (The
initial operEdge state when a port is initialized). All means all ports will have one
specific setting.
 Auto Edge Controls whether the bridge should enable automatic edge detection on the
bridge port. This allows operEdge to be derived from whether BPDU's are
received on the port or not.