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Chapter 10: Configuring Spanning Tree
Defining Multiple Spanning Tree
SGE2000/SGE2000P Gigabit Ethernet Switch Reference Guide
Chapter
10
• Interface State — Indicates whether the port is enabled or disabled in the specific instance.
2. Click the Interface Table button. The Interface Table Page opens:
Interface Table Page
The Interface Table Page contains the following fields:
• Instance ID — Defines the VLAN group to which the interface is assigned.
• Interface — Displays the interface for which the MSTP settings are displayed. The possible field
values are:
– Port — Specifies the port for which the MSTP settings are displayed.
– LAG — Specifies the LAG for which the MSTP settings are displayed.
• Role — Indicates the port role assigned by the STP algorithm in order to provide to STP paths. The
possible field values are:
– Root — Provides the lowest cost path to forward packets to root device.
– Designated — Indicates the port or LAG via which the designated device is attached to the
LAN.
– Alternate — Provides an alternate path to the root device from the root interface.
– Backup — Provides a backup path to the designated port path toward the Spanning Tree
leaves. Backup ports occur only when two ports are connected in a loop by a point-to-point
link. Backup ports also occur when a LAN has two or more connections connected to a
shared segment.
– Disabled — Indicates the port is not participating in the Spanning Tree.
• Mode — Indicates the current Spanning Tree mode. The Spanning Tree mode is selected in the
Global STP page. The possible field values are:
– Classic STP — Indicates that Classic STP is enabled on the device.
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