User`s manual

Featured Functions
MOXA EtherDevice Server User’s Manual
6-27
Redundant Ring Configuration Items
Configuration Item Description
Root/Not Root
Indicates if this device is or is not the Root of the Spanning
Tree (the root is determined automatically).
Bridge priority
Increase this device’s bridge priority by inputting a lower
number. A device with a higher bridge priority has a greater
chance of being established as the root of the Spanning Tree
topology.
Hello time (sec.)
The root of the Spanning Tree topology periodically sends
out a “hello” message to other devices on the network to
check if the topology is healthy. The “hello time” is the
amount of time the root waits between sending hello
messages (see below for further explanation).
Max. Age (sec.)
If this device is not the root, and it has not received a hello
message from the root in an amount of time equal to “Max.
Age,” then this device will reconfigure itself as a root. Once
two or more devices on the network are recognized as a
root, the devices will renegotiate to set up a new Spanning
Tree topology (see below for further explanation).
Forwarding delay (sec.)
The amount of time this device waits before checking to see
if it should change to a different state (see below for further
explanation).
Enable STP
Enable or Disable the port as a node on the Spanning Tree
topology.
Port Priority
Increase this port’s priority as a node on the Spanning Tree
topology by inputting a lower number.
Port Cost
Input a higher cost to indicate that this port is less suitable
as a node for the Spanning Tree topology.
Status Indicates the current Spanning Tree status of this port.