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Table 3-25 STP Global Setup Page item description
Item Description
Spanning Tree
State
Defines whether STP is enabled on the switch. The possible field
values are:
z Disable: Disables STP and RSTP on the switch.
z Classic: Enables STP on the switch.
z RSTP: Enables RSTP on the switch.
BPDU
Handling
Determines how BPDU packets are managed when STP is
disabled on the port or switch. BPDUs are used to transmit
spanning tree information. The possible field values are:
z Filtering: Filters BPDU packets when spanning tree is disabled
on an interface.
z Flooding: Floods BPDU packets when spanning tree is
disabled on an interface. This is the default value.
Global
Settings
Path Cost
Default Values
Specifies the method used to assign default path cost to STP
ports. The possible field values are:
z Short: Specifies 1 through 65535 ranges for port path cost. This
is the default value.
z Long: Specifies 1 through 200000000 ranges for port path cost.
The default path cost assigned to an interface varies according
to the selected method (Hello Time, Max Age, or Forward
Delay).
Priority
Specifies the bridge priority value. When switches or bridges are
running STP, each is assigned a priority. After exchanging
BPDUs, the switch with the lowest priority value becomes the Root
Bridge. The field range is 0-61440. The default value is 32768. The
port priority value is provided in increments of 4096.
Hello Time
Specifies the switch Hello Time. The Hello Time indicates the
amount of time in seconds a Root Bridge waits between
configuration messages. The default is 2 seconds.
Max Age
Specifies the switch Maximum Age Time. The Maximum Age Time
is the amount of time in seconds a bridge waits before sending
configuration messages. The default Maximum Age Time is 20
seconds.
Bridge
Settings
Forward Delay
Specifies the switch Forward Delay Time. The Forward Delay
Time is the amount of time in seconds a bridge remains in a
listening and learning state before forwarding packets. The default
is 15 seconds.
Bridge ID Identifies the Bridge priority and MAC address.
Root Bridge ID Identifies the Root Bridge priority and MAC address.
Root Port
Indicates the port number that offers the lowest cost path from this
bridge to the Root Bridge. This field is significant when the bridge
is not the Root Bridge. The default is zero.
Root Path Cost Indicates the cost of the path from this bridge to the Root Bridge.
Topology
Changes
Counts
Indicates the total amount of STP state changes that have
occurred.
Designated
Root
Last Topology
Change
Indicates the amount of time that has elapsed since the bridge was
initialized or reset, and the last topographic change that occurred.
The time is displayed in a day-hour-minute-second format, such as
2 days 5 hours 10 minutes and 4 seconds.
