ProSoft Technology RLX2-IHNF-WC - Manual (Page 95)

RLX2 Industrial Hotspot Series
ProSoft Technology, Inc. Page 95 of 212
June 15, 2015
Spanning Tree Settings
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.
All RLX2 models 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".