D-Link DES-3250TG User Manual page 59

The following fields can be set:
Note: The Hello Time cannot be longer than the Max. Age. Otherwise, a configuration error will occur.
D-Link DES-3250TG Standalone Layer 2 Switch
Parameter
Spanning Tree
Protocol <Disabled>
Bridge Max Age (6-40
Sec) <20 >
Bridge Hello Time (1-
10 Sec) < 2 >
Bridge Forward Delay
(4-30 sec) <15 >
Bridge Priority (0-
65535 Sec) <32768>
STP Version
TX Hold Count(1-10)
Forwarding BPDU
<Enabled>
Description
This field can be toggled between Enabled
and Disabled using the pull-down menu. This
will enable or disable the Spanning Tree
Protocol (STP), globally, for the switch.
The Bridge Maximum Age can be set from 6
to 40 seconds. At the end of the Max. Age, if
a BPDU has still not been received from the
Root Bridge, your switch will start sending
its own BPDU to all other switches for
permission to become the Root Bridge. If it
turns out that your switch has the lowest
Bridge Identifier, it will become the Root
Bridge.
The Bridge Hello Time can be set from 1 to
10 seconds. This is the interval between two
transmissions of BPDU packets sent by the
Root Bridge to tell all other switches that it is
indeed the Root Bridge.
The Bridge Forward Delay can be from 4 to
30 seconds. This is the time any port on the
switch spends in the listening state while
moving from the blocking state to the
forwarding state.
A Bridge Priority for the switch can be set
from 0 to 65535. This number is used in the
voting process between switches on the
network to determine which switch will be
the root switch. A low number indicates a
high priority, and a high probability that this
switch will be elected as the root switch.
Choose rstp or StpCompatibility. Both
versions use STP parameters in the same
way. RSTP is fully compatible with IEEE
802.1d STP and will function with legacy
equipment.
This is the maximum number of Hello
packets transmitted per interval. The count
can be specified from 1 to 10. The default
value is 3.
This allows you to control whether or not to
forward Bridge Protocol Data Units.
Disabling this setting can be useful if, for
example, the present switch has been
designated as the root bridge and you do not
want that status to change.
49