D-Link DES-2110, User Manual

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the network, preventing the effective propagation of the new
information. Set by the Root Bridge, this value will aid 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 it turns out that your switch has the lowest Bridge
Identifier, it will become the Root Bridge. The user may choose a time
between 6 and 40 seconds. The default value is 20.
Bridge Hello Time: The user may set the time interval between
transmission of configuration messages by the root device, thus
stating that the Switch is still functioning. A time between 1 and 10
seconds may be chosen, with a default setting of 2 seconds.
Bridge Forward Delay: The maximum amount of time (in seconds)
that the root device will wait before changing states. The user may
choose a time between 4 and 30 seconds. The default is 15 seconds.
Port Path Cost: This defines a metric that indicates the relative cost
of forwarding packets to specified port list. The value between 1 and
65535 to determine the cost. The lower the number, the greater the
probability the port will be chosen to forward packets. The default
value is 10.
Port Path Priority: Select a value between 0 and 255 to specify the
priority for a specified port for forwarding packets. The lower the
value, the higher the priority. The default is 128.