beautypg.com

PLANET MGSW-28240F User Manual

Page 165

background image

User’s Manual of MGSW-28240F

The page includes the following fields:

Object

Description

The switch port number of the logical STP port.

Port

Controls whether RSTP is enabled on this switch port,

*

means to select all ports

of Managed Switch.

STP Enabled

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.

Path Cost

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.

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.

Admin 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.

Auto Edge

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 Role

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

165