User Manual

AirWorks AWK-3131A Web Console Configuration
RSTP Settings (for Master or Slave mode only)
AWK-3131A supports IEEE802.1D Spanning Tree Protocol and IEEE802.1w Rapid STP standards. In addition
to eliminating unexpected path looping, STP/RSTP can provide a backup path recovery if a wired/ wireless
path fails accidentally. The reliability and availability can increase because this fail-over function.
AWK-3131A’s STP/RSTP feature is disabled by default. To be completely effective, you must enable
RSTP/STP on every AWK-3131A connected to your network. If AWK-3131A plays a Slave role, which is
connected to a device (PLC, RTU, etc.) as opposed to network switch equipment, it is not necessary to
enable STP/RSTP. The reason is that it will cause unnecessary negotiation. AWK-3131As support STP/RSTP
in Master or Slave mode only.
The following figures indicate which Spanning Tree Protocol parameters can be configured. A more detailed
explanation of each parameter is given below the figure.
RSTP status
This field will appear only when selected to operate STP/RSTP. It indicates whether this AWK-3131A is the
Root of the Spanning Tree (the root is determined automatically) or not.
Bridge priority
Setting Description Factory Default
Numerical value You can increase the bridge priority by selecting a lower 32768
selected number. A higher bridge priority brings a greater chance of
by user being established as the root of the Spanning Tree topology.
Hello time
Setting Description Factory Default
Numerical value input The root of the Spanning Tree topology periodically sends out a 2 (seconds)
by user “hello” message to other devices on the network to check if the
(1 – 10 seconds) topology is healthy. Hello time indicates how often the root
sends hello messages.
Forwarding delay
Setting Description Factory Default
Numerical value input The amount of time this device waits before checking to see if it 15 (seconds)
by user should change to a different topology.
(4 – 30 seconds)
Max. age
Setting Description Factory Default
Numerical value input As a non-root role, if the device has not received a hello 20 (seconds)
by user message from the root longer than Max. age, it will reconfigure
(6 – 40 seconds) 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
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