Planet Technology WGSW-48040 - Manual (Page 99)

User’s Manual of WGSW-24020/WGSW-48040
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ensure that the link between switch B and switch C is the blocked link.
■ 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 4-47) describes the STP status on the device.
Figure 4-47 STP Status screen
The page contains the following fields:
Spanning Tree State
By which indicates if STP is enabled on the device.
Spanning Tree Mode
By which indicates the STP mode by which STP is enabled on the device.
Bridge ID
Where identifies the Bridge priority and MAC address.
Designated Root
This indicates the ID of the bridge with the lowest path cost to the instance ID.
Root Port
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 0.
Root Path Cost
Where the cost of the path from this bridge to the root.