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Parameters
These parameters are displayed:
Basic Configuration of Global Settings
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Spanning Tree Status – Enables/disables STA on this switch. (Default: Enabled)
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Spanning Tree Type – Specifies the type of spanning tree used on this switch:
STP: Spanning Tree Protocol (IEEE 802.1D); i.e., when this option is selected,
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the switch will use RSTP set to STP forced compatibility mode).
RSTP: Rapid Spanning Tree (IEEE 802.1w); RSTP is the default.
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MSTP: Multiple Spanning Tree (IEEE 802.1s)
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Priority – Bridge priority is used in selecting the root device, root port, and
designated port. The device with the highest priority becomes the STA root
device. However, if all devices have the same priority, the device with the
lowest MAC address will then become the root device. (Note that lower
numeric values indicate higher priority.)
Default: 32768
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Range: 0-61440, in steps of 4096
Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864,
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40960, 45056, 49152, 53248, 57344, 61440
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BPDU Flooding – Configures the system to flood BPDUs to all other ports on
the switch or just to all other ports in the same VLAN when spanning tree is
disabled globally on the switch or disabled on a specific port.
To VLAN: Floods BPDUs to all other ports within the receiving port's native
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VLAN (i.e., as determined by port's PVID). This is the default.
To All: Floods BPDUs to all other ports on the switch.
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The setting has no effect if BPDU flooding is disabled on a port (see
"Configuring Interface Settings for
Advanced Configuration Settings
The following attributes are based on RSTP, but also apply to STP since the switch
uses a backwards-compatible subset of RSTP to implement STP, and also apply to
MSTP which is based on RSTP according to the standard:
◆
Path Cost Method – The path cost is used to determine the best path between
devices. The path cost method is used to determine the range of values that
can be assigned to each interface.
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Long: Specifies 32-bit based values that range from 1-200,000,000.
(This is the default.)
Short: Specifies 16-bit based values that range from 1-65535.
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Chapter 7
STA").
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| Spanning Tree Algorithm
Configuring Global Settings for STA
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