Digisol DG-FS4528P, Management Manual

Page: 297 / 973

C
HAPTER
11 | 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 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:
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).
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.)
Default: 32768
Range: 0-61440, in steps of 4096
Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440
Spanning Tree 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 VLAN (i.e., as determined by port’s PVID). This is the default.
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" ).
When the Switch Becomes Root
Hello Time – Interval (in seconds) at which the root device transmits a
configuration message.
Default: 2
Minimum: 1
Maximum: The lower of 10 or [(Max. Message Age / 2) -1]