Vivotek AW-GEV-104A Series, User Manual And Warranty Statement

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User Manual rev. 1.1. Aug. 2015
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Parameter description:

Port :
The switch port number of the logical STP port.

STP Enabled :
Controls whether STP 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 favour 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).

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 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 the administrator or the physical link state of the attached
LANs transits frequently.

BPDU Guard :
If enabled, causes the port to disable itself upon receiving valid BPDU's. Contrary
to the similar bridge setting, the port Edge status does not affect this setting. A
port entering error-disabled state due to this setting is subject to the bridge Port
Error Recovery setting as well.