EDS-508A/505A Series User’s Manual Featured Functions
3-47
Forwarding Delay
Setting Description Factory Default
Numerical value input by
user
The amount of time this device waits before
checking to see if it should change to a
different state.
15 (sec.)
Hello time (sec.)
Setting Description Factory Default
Numerical value input by
user
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.
2
Max. Age (sec.)
Setting Description Factory Default
Numerical value input by
user
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.
20
Enable STP per Port
Setting Description Factory Default
Enable/Disable Select to enable the port as a node on the
Spanning Tree topology.
Disabled
NOTE
We suggest not enabling the Spanning Tree Protocol once the port is connected to a device (PLC,
RTU, etc.) as opposed to network equipment. The reason is that it will cause unnecessary
negotiation.
Port Priority
Setting Description Factory Default
Numerical value selected
by user
Increase this port’s priority as a node on the
Spanning Tree topology by entering a lower
number.
128
Port Cost
Setting Description Factory Default
Numerical value input by
user
Input a higher cost to indicate that this port is
less suitable as a node for the Spanning Tree
topology.
200000
Port Status
Indicates the current Spanning Tree status of this port. “Forwarding” for normal transmission, or
“Blocking” to block transmission.
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