Operation Manual

Chapter 5
Advanced Configuration
41
8-Port 10/100/1000 Gigabit Switch with Webview
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 to 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
Spanning Tree > Global STP
The Global STP screen contains parameters for enabling
STP on the device.
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.
Path Cost Default Values Specifies the method used to
assign default path costs to STP ports. The possible field
values are:
Short • Specifies 1 through 65,535 range for port path
costs. This is the default value.
Long • Specifies 1 through 200,000,000 range for
port path costs.The default path costs assigned to an
interface varies according to the selected method.
NOTE: Lower numeric values indicate higher
priority.
Bridge Settings
Priority Specifies the bridge priority value. When switches
or bridges are running STP, each is assigned a priority.
After exchanging BPDUs, the device with the lowest
priority value becomes the Root Bridge. The default value
is 32768. The port priority value is provided in increments
of 4096. For example, 4096, 8192, 12288, etc. The range is
0 to 65535.
Hello Time Specifies 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 to 10 seconds.
Max Age Specifies 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 to 40 seconds.
Forward Delay Specifies 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 to 30 seconds.