Interlogix NS3502-8P-2S User Manual - Manual (Page 153)

IFS NS3502-8P-2S User Manual
153
• STP Enabled Controls whether RSTP is enabled on this switch port.
• 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.
• 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
• 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.
• AdminEdge Controls whether the operEdge flag should start as being set or
cleared. (The initial operEdge state when a port is initialized).
• AutoEdge 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.
• Restricted Role If enabled, causes the port not to be selected as Root Port for the
CIST or any MSTI, even if it has the best spanning tree priority
vector. Such a port will be selected as an Alternate Port after the
Root Port has been selected. If set, it can cause lack of spanning
tree connectivity. It can be set by a network administrator to
prevent bridges external to a core region of the network
influence the spanning tree active topology, possibly because
those bridges are not under the full control of the administrator.
This feature is also known as Root Guard.
• Restricted TCN If enabled, causes the port not to propagate received topology
change notifications and topology changes to other ports. If set it
can cause temporary loss of connectivity after changes in a
spanning tree's active topology as a result of persistently
incorrect learned station location information. It is set by a
network administrator to prevent bridges external to a core
region of the network, causing address flushing in that region,
possibly because those bridges are not under the full control of