User's Manual

AirWorks AWK-5222 User’s Manual Web Console Configuration
3-31
RSTP Settings (for Redundant AP or AP mode only)
AWK-5222 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-5222’s STP/RSTP feature is disabled by default. To be completely effective, you must
enable RSTP/STP on every AWK-5222 connected to your network. If AWK-5222 plays a Client
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.
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-5222 is the Root of the Spanning Tree (the root is determined automatically) or not.
Bridge priority
Setting Description Factory Default
Numerical value
selected
by user
You can increase the bridge priority
by selecting a lower number. A
higher bridge priority brings a greater
chance of being established as the
root of the Spanning Tree topology.
32768
Hello time
Setting Description Factory Default
Numerical value input
by user
(1 – 10 seconds)
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. Hello time indicates how
often the root sends hello messages.
2 (seconds)