Table of Contents
Advertisement
D-View 5.1 User's Guide
The object table reflects the changes you made to the configurable MIB objects. If you
want to close the Information dialog box to view other MIB objects from other options,
just double-click its Control-menu box.
Spanning Tree →Port Table
This command displays the contents of the device spanning tree port table. This table
provides information maintained by each port regarding its spanning state.
When you choose this command, the STP Port Table appears on the screen.
The following describes the various components on the above table:
The port table displays spanning information about each port on the bridge. This table
is divided into eleven columns as listed below. Except for the Index column, all
columns in this table can be resized by dragging their respective right borders with the
mouse left button. Each entry corresponds to one port on the bridge.
The following describes each column:
The Index column displays the corresponding index number of each entry.
The Port column corresponds to the Dot1dStpPort MIB object of the dot1dStp group.
This read-only object displays the physical number of the port for which this entry
pertains. This value is used in conjunction with the port priority to set the port ID.
The Priority column corresponds to the Dot1dStpPortPriority MIB object of the
dot1dSTp group. This read-write object displays the priority number of the port. This
value is used in conjunction with the physical port number to set the port ID that in
turn is used when determining the root port of a bridge. The root port is responsible for
forwarding packets from the bridge to the root bridge.
The State column corresponds to the Dot1dStpPortState MIB object of the dot1dStp
group. This read-only object indicates the current spanning state of the port. A port can
have the following states: disabled, blocking, listening, learning, forwarding, and
broken. A broken state means that the link on the port has been broken because the
port is malfunctioning. Blocking means that the port has been blocked because it is
neither a root port nor a designated port. In STP, only root and designated ports are
used.
The Status column corresponds to the Dot1dStpPortEnable MIB object of the dot1dStp
group. This read-write object enables or disables the port.
The Path Cost column corresponds to the Dot1dStpPortPathCost MIB object of the
dot1dStp group. This read-write object specifies the path cost for the network segment
attached to the port. By convention, a 10Mbps LAN has a path cost of 100, while
146
Advertisement
Table of Contents
