DGS-3100 Series Gigabit Stackable Managed Switch User Manual
Field Description
either globally or on a single interface. The possible values are:
Enabled – Allows the forwarding of STP BPDU packets from other network
devices..
Disabled – BPDU forwarding is disabled on the device. (This is the default value)
Bridge Priority (0 – 65535)
Specifies the selected spanning tree instance device priority. The field range is 0-65535.
The default value is 32768.
Bridge Max Age (6- 40)
Set to ensure old information is not circulated endlessly through redundant paths in the
network, preventing the effective propagation of the new information. Set by the Root
Bridge, this value aids in determining that the switch has spanning tree configuration
values consistent with other devices on the bridged LAN. If the value ages out and a
BPDU has still not been received from the Root Bridge, the switch will start sending its
own BPDU to all other switches for permission to become the Root Bridge. If your
switch has the lowest Bridge Identifier, it will become the Root Bridge. The user can
choose between 6 and 40 seconds. The default value is 20.
Bridge Hello Time (1 – 10)
The interval between two transmissions of BPDU packets sent by the Root Bridge to
indicate to all other switches that it is indeed the Root Bridge. The default value is 2.
Bridge Forward Delay
(4 – 30)
Defines the time any port on the switch is in the listening state while moving from the
blocking state to learning state and then to the forwarding state. The default value is 15.
Max Hops (1 – 20)
Specifies the total number of hops that occur before the BPDU is discarded. Once the
BPDU is discarded, the port information is aged out. The possible field range is 1-20.
The field default is 20 hops.
LBD Recovery Time (30 –
86400)
Defines the amount of time that passes after ports that were shut down through LBD
are moved to active The possible field range is 30 - 86400 seconds. The default is 60
seconds (2 minutes).
2. Select Enable/Disable in the STP Status field.
3. Define the STP Version, Forwarding BPDU, Bridge Priority, Bridge Max Age, Bridge Hello Time, Bridge
Forward Delay, Max Hops fields and LBD Recovery Time.
4. Click
. The Spanning Tree Global Parameters are defined, and the device is updated.
NOTE: The Global STP status default was ‘Enable’ in previous software versions and was
change
d to ‘Disable’. Please note that if STP enabled is the required state, you should enable
STP via the WEB GUI or the CLI.
NOTE: In case of STP loopback the port will be shutdown, the port will be a
ctivated after the
loopback is removed.
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