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TRENDnet User’s Guide
TL2-FG142
50
This page contains settings for physical and aggregated ports.
Items
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
effect this setting.
A port entering error-disabled state due to this setting is subject to the
bridge Port Error Recovery setting as well.
Point-to-
Point
Controls whether the port connects to a point-to-point LAN rather than
to 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.
Button
Click to save changes.
Click to undo any changes made locally and revert to previously saved values.
4.3.15.5 MSTI Ports
This page allows the user to inspect the current STP MSTI port configurations, and
possibly change them as well.
An MSTI port is a virtual port, which is instantiated separately for each active CIST
(physical) port for each MSTI instance configured on and applicable to the port. The
MSTI instance must be selected before displaying actual MSTI port configuration
options.
This page contains MSTI port settings for physical and aggregated ports.
Summary of Contents for TL2-FG142
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