Spanning Tree VLAN Configuration report

The Spanning Tree VLAN Config report details the STP settings and connectivities for the selected VLAN.

The report is in 3 sections:

Summary section:

Name	Description
Sample Date	date to which the device configuration data refers. Device STP data is collected daily by stpman.
VTP Pruning	VTP pruning status can either be: enabled - device only receives broadcast frames for VLANs to which it has ports assigned. disabled - device receives all broadcast frames and forwards them through all its trunk ports.
STP Summary	root switch is the switch acting as the center of the VLAN. Other switches use this as the center of the network when calculating a set of root and designated ports during the initial convergeence to create a loop-free network. Trunk port count uses 3 measures: Forwarding is the number of trunk ports in the STP state Forward, capable of sending and receiving user data. Blocking is the number of trunk ports in the STP state Backward, receiving only BPDUs. Diameter is the Layer 2 network diameter, i.e. the maximum number of switch hops between any two hosts in the Layer 2 network.
VTP Servers	list of VTP servers.
VTP Switches	lists the STP switches
VTP Anomalies	lists the VRP anomalies recorded for this date.

STP Connectivity settings:

Name	Description
From	device and port address connected to another device.
State	local device's port's STP state, i.e. Blocking, Forwarding, Designated Port, Root Port and Non-Designated Port.
Connected to	address of the host and port.
State	target device's port's STP state, i.e. Blocking, Forwarding, Designated Port, Root Port and Non-Designated Port.
Cost	cumulative root path cost. The lower the value, the closer the devices are.

STP VLAN configuration:

Name	Description
Switch	switch resolved name or IP address.
Root Switch > Port	switch acting as the center of the VLAN. Other switches use this as the center of the network when calculating a set of root and designated ports during the initial convergence to create a loop-free network. The second value is the device's designated root port. For the root switch, this is set to NULL as the root switch does not have a designated root port.
Root Cost	cumulative root path cost. The lower the value, the closer the devices are.
Change Count	number of Root Switch changes. This is a running total.
Max Age	length of time (in seconds) that the switch stores a BPDU before discarding it.
Forward Delay	time (in seconds) the switch spends in the Listening and Learning states.
Hello Time	time interval (in seconds) between the sending of Configuration BPDUs.
Hold Time	time interval (in seconds) between the sending of Configuration BPDUs.

To run a Spanning Tree VLAN Config report:

In the Main Menu, click Reports.
This will open the Reports page. Click Inventory Reports.
This will open the Inventory Reports page. Click Spanning Tree VLAN Configuration.
This will open the Spanning Tree VLAN Configuration Options page.
If you want to reuse previously saved report values, select it in the Use saved values dropdown field.
Specify the format of the report in the Report format field.
Specify the View containing the VLAN against which the report is to be run in the Please select a View dropdown field. From ENA v18.0 P06 upwards, you can drag Views into this field from the Drop Box.
Specify the VLAN against which the report is to be run in the Please select a device dropdown field.
Specify the start date and end date for the report in their respective dropdown fields.
ENA v17.0 P08 upwards: Specify the time zone to which you want the reporting period to apply. By default, this is set to None, which means that the time zone of the host/consolidation server is used.
Click Save to save your report values, Run to run immediately, or click Cancel.