Edge-Core ECS4660-28F, Management Manual, Page: 277 / 2020

C
HAPTER
8
| Spanning Tree Algorithm
Configuring Global Settings for STA
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Be careful when switching between spanning tree modes. Changing
modes stops all spanning-tree instances for the previous mode and
restarts the system in the new mode, temporarily disrupting user
traffic.
P
ARAMETERS
These parameters are displayed:
Basic Configuration of Global Settings
◆
Spanning Tree Status – Enables/disables STA on this switch.
(Default: Enabled)
◆
Spanning Tree Type – Specifies the type of spanning tree used on
this switch:
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STP : Spanning Tree Protocol (IEEE 802.1D); i.e., when this option
is selected, the switch will use RSTP set to STP forced compatibility
mode).
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RSTP : Rapid Spanning Tree (IEEE 802.1w); RSTP is the default.
■
MSTP : Multiple Spanning Tree (IEEE 802.1s)
◆
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.)
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Default: 32768
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Range: 0-61440, in steps of 4096
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Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440
◆
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.
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To VLAN: Floods BPDUs to all other ports within the receiving port’s
native VLAN (i.e., as determined by port’s PVID). This is the default.
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To All: Floods BPDUs to all other ports on the switch.
The setting has no effect if BPDU flooding is disabled on a port (see
"Configuring Interface Settings for STA" ).
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: