Chapter 5 | Advanced Configuration |
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.
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