User Guide

Chapter 5
Advanced Configuration
44
WebView Switches
Spanning Tree > STP Status
The STP Status screen describes the STP status on the
device.
Spanning Tree > STP Status
Spanning Tree State Indicates if STP is enabled on the
device.
Spanning Tree Mode Indicates the STP mode by which
STP is enabled on the device.
Bridge ID Identifies the Bridge priority and MAC
address.
Designated Root Indicates the ID of the bridge with the
lowest path cost to the instance ID.
Root Port 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 The cost of the path from this bridge to
the root.
Root Maximum Age (sec) Indicates the device
Maximum Age Time. The Maximum Age Time indicates
the amount of time in seconds a bridge waits before
sending configuration messages. The default max age is
20 seconds. The range is 6–40 seconds.
Root Hello Time (sec) Indicates the device Hello Time.
The Hello Time indicates the amount of time in seconds
a root bridge waits between configuration messages. The
default is 2 seconds. The range is 1–10 seconds.
Root Forward delay (sec) Indicates the device forward
delay time. The Forward Delay Time indicates the amount
of time in seconds a bridge remains in a listening and
learning state before forwarding packets. The default is
15 seconds. The range is 4–30 seconds.
Topology Changes Counts Indicates the total amount of
STP state changes that have occurred.
Last Topology Change Indicates the amount of time
that has elapsed since the bridge was initialized or reset,
and the last topographic change occurred. The time is
displayed in a day hour minute second format, for example,
2 days 5 hours 10 minutes and 4 seconds.
Spanning Tree > Global STP
The Global STP screen contains parameters for enabling
STP on the device.
Spanning Tree > Global STP
Global Setting
Spanning Tree State Indicates if STP is enabled on the
device.
STP Operation Mode Indicates the STP mode by which
STP is enabled on the device. The possible field values
are:
Classic STP • Enables Classic STP on the device. This is
the default value.
Rapid STP • Enables Rapid STP on the device.
Multiple STP • Enables Multiple STP on the device.
BPDU Handling Determines how BPDU packets are
managed when STP is disabled on the port/device. BPDUs
are used to transmit spanning tree information. The
possible field values are:
Filtering • Filters BPDU packets when spanning tree is
disabled on an interface. This is the default value.
Flooding • Floods BPDU packets when spanning tree is
disabled on an interface.