•
To create a protected ports group and add ports to the group, click
Add
and configure the settings
in the available fields.
•
To change the name or the port members for an existing group, select the group to update and click
Edit
.
•
To remove one or more protected ports groups, select each entry to delete and click
Remove
. You
must confirm the action before the entry is deleted.
Table 228: Protected Ports Configuration Fields
Field
Description
Group Name
This is the configured name of the protected ports group.
Protected Ports
The ports that are members of the protected ports group. When adding a port
to a protected ports group, the Available Interfaces field lists the ports that are
not already members of a protected ports group. To move an interface between
the Available Interfaces and Selected Interfaces fields, click the port (or
[Ctrl]
+
click to select multiple ports), and then click the appropriate arrow to move the
port(s) to the desired field.
Click
Refresh
to update the information on the screen with the most current data.
Configuring Spanning Tree Protocol
The
provides a tree topology for any arrangement of bridges. STP also
provides one path between end stations on a network, eliminating loops. Spanning tree versions
supported include Common STP, Multiple STP, and Rapid STP.
Classic STP provides a single path between end stations, avoiding and eliminating loops. For
information on configuring Common STP, see
MSTP (Multiple Spanning Tree Protocol)
supports multiple instances of Spanning Tree to efficiently
channel VLAN traffic over different interfaces. Each instance of the Spanning Tree behaves in the
manner specified in IEEE 802.1w, Rapid Spanning Tree (RSTP), with slight modifications in the working
but not the end effect (chief among the effects, is the rapid transitioning of the port to ‘Forwarding’).
The difference between the RSTP and the traditional STP (IEEE 802.1D) is the ability to configure and
recognize full duplex connectivity and ports which are connected to end stations, resulting in rapid
transitioning of the port to ‘Forwarding’ state and the suppression of Topology Change Notification.
These features are represented by the parameters ‘pointtopoint’ and ‘edgeport’. MSTP is compatible to
both RSTP and STP. It behaves appropriately to STP and RSTP bridges. A MSTP bridge can be
configured to behave entirely as a RSTP bridge or a STP bridge.
Note
For two bridges to be in the same region, the force version should be 802.1S and their
configuration name, digest key, and revision level should match. For more information about
regions and their effect on network topology, refer to the IEEE 802.1Q standard.
Switch Configuration/Status
The Spanning Tree Switch Configuration/Status page contains fields for enabling
on the switch.
Configuring Switching Information
ExtremeSwitching 200 Series: Administration Guide
224