User’s Manual of WGSD-1022/WGSD-8000

■Supported Spanning Tree Protocol of WGSD Series Switch

Spanning Tree Protocol (STP) provides tree topography for any arrangement of bridges. STP also provides one path between end stations on a network, eliminating loops.

Loops occur when alternate routes exist between hosts. Loops in an extended network can cause bridges to forward traffic indefinitely, resulting in increased traffic and reducing network efficiency.

The device supports the following Spanning Tree versions:

•Classic STP, by which provides a single path between end stations, avoiding and eliminating loops.

•Rapid STP, which detects and uses network topologies that provide faster convergence of the spanning tree, without creating forwarding loops.

•Multiple STP, which provides full connectivity for packets allocated to any VLAN. Multiple STP is based on the RSTP. In addition, Multiple STP transmits packets assigned to different VLANs through different MST regions. MST regions act as a single bridge.

4.9.1 STP Status

The STP Status screen (see figure 4-45) describes the STP status on the device.

Figure 4-45STP Status screen

The page contains the following fields:

•Spanning Tree State

•Spanning Tree Mode

•Bridge ID

•Designated Root

•Root Port

By which indicates if STP is enabled on the device.

By which indicates the STP mode by which STP is enabled on the device

Where identifies the Bridge priority and MAC address.

This indicates the ID of the bridge with the lowest path cost to the instance ID.

Where indicates the port number that offers the lowest cost path from this bridge to the Root Bridge. It is significant when the Bridge is not the Root.

The default is zero.

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