Radio Configuration / Diagnostic Utility
RLXIB-IHW-66
♦
802.11a, b, g
User Manual
Industrial Hotspot
ProSoft Technology, Inc.
Page 49 of 109
May 18, 2009
4.2.4 Spanning
Tree
Settings
This configuration page opens when you click the Spanning Tree button on the
Radio Configuration form.
Field Description
Enable Spanning Tree
Spanning Tree is enabled when this box is checked. Without spanning
tree, redundant connections might exist if multiple radio links are
created in parallel with each other. Redundant connections are
blocked only if spanning tree is enabled. Additionally, spanning tree is
used to flush the Ethernet switch table when the network topology
changes as described in the section on Automatic Parent Selection.
Firmware versions 2.5xx and above for RLX-IH, and all versions of
RLXIB radios also support Rapid Spanning Tree (RSTP), and will
default to this mode when enabled.
The recommended setting for spanning tree is "Enabled".
Ethernet Edge Port
Because RSTP is an active protocol, it depends on communication
between RSTP devices. If no RSTP device is connected to the radio’s
Ethernet port, the handshake cannot take place. In this case RSTP
reverts to STP. This means that the Ethernet port will be forced to
adhere to the timer based transition protocol of STP.
Therefore on network transitions and power up, communications will
not be allowed over the Ethernet port for 30 to 45 seconds. This
setting is an indication that no redundant connections exist out this
port and communication can immediately be allowed. If for some
reason a BPDU is received on this port, the RSTP protocol will
negotiate properly and handle any possible redundant paths.
The recommended setting for Ethernet Edge Port is "Enabled".
Bridge Times
The values in this list configure the timing intervals to use.
Priority
This setting determines who should be the root of the RSTP. The
RSTP device with the lowest priority becomes the root. The accepted
standard value for this is 32768. If wired switches exist in the network
that support RSTP, they should always be allowed to be the root.
Set this value to 32769 to prevent the radio from being the root over a
wired switch. Use this setting when a radio is configured to be a
Master.
Set this value to 32770 when the radio is configured to be a Repeater.
In this way, if only IHs exist in the network, the Master radio will
become the root.