D-Link DHS-3224V Switch User’s Guide
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Spanning Tree Protocol Configuration
The following figures and tables describe the configuration of the Spanning Tree Protocol (STP) on the switch.
Figure7- 34. STP Switch Settings Menu
Set the parameters listed below in the STP Switch Settings menu.
Spanning
Tree Protocol
Allows the STP to be globally Enabled or Disabled on the switch. Default =
Enabled.
Max Age
The maximum time (in seconds) a device can wait without receiving a
configuration message before attempting to reconfigure. All device ports (except
for designated ports) should receive configuration messages at regular intervals.
Any port that ages out STP information (provided in the last configuration
message) becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the device ports attached to the network.
The minimum value is the higher of 6 or [2 x (Hello Time +1)].
The maximum value is the lower of 40 or [2 x (Forward Delay –1)].
Default = 20Default = 20
Hello Time
The time interval (in seconds) at which the root device transmits a configuration
message. Default = 2
Forward
Delay
The maximum time (in seconds) the root device will wait before changing states
(i.e., from the listening to learning to forwarding). This delay is required because
every device must receive information about topology changes before it starts to
forward packets. In addition, each port needs time to listen for conflicting
information that would make it return to a blocking state; otherwise, temporary
data loops might result.
Maximum value is 30
Minimum value is the higher of 4 or [(Max. Age / 2) +1]
Default = 15
Bridge
Priority
Device priority used in selecting the root device, root port, and designated port.
The device with the highest priority becomes the STP root device. The lower the
numeric value, the higher the priority. If all devices have the same priority, the
device with the lowest MAC address will become the root device.
Range 0 to 65535. Default = 32,768
