Antaira Industrial Ethernet Switches
LMP-0501 Series User Manual V1.0
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As shown in
Figure 5.28
, the ERPS is blocked at one of the ring node ports. The blocked port is
chosen by an election mechanism that is decided by the MAC address. Due to the unique MAC
address; the ERPS will just choose the biggest MAC as the blocking node.
However, the user is still required to enable the RRPS protocol, and assign a dedicated port
number for each uplink port under “Ring Port 0 and 1”, but there is no requirement to setting the
role.
Figure 5.29
, below, shows the configurations as a reference.
After the configurations, press the “Apply” button on the bottom right corner to save the settings.
Note:
The port number within
“Ring Port 0” and “Ring Port 1” cannot be duplicated.
5.6 Spanning Tree
The Spanning Tree Protocol (STP), defined in the IEEE Standard 802.1d, can be created within a
mesh network of connected layer-2 switches.
The Rapid Spanning Tree Protocol (RSTP), defined in the IEEE 802.1w. RSTP is an enhanced
solution of STP. It shares most of its basic operation characteristics, and essentially creates a
cascading effect away from the root bridge where each designated bridge proposes to its
neighbors to determine if it can make a rapid transition.
Another extension of RSTP is the Multiple Spanning Tree protocol (MSTP), defined in the
Figure 5.29
– Non-Configured Architecture Setup
example
Caution
:
Before enabling any ERPS protocols on any of the Ring Nodes, please
DO NOT connect all the switches to form a loop (ring) network just yet.
There should be at least one ring port left unplugged until all nodes in
the topology are ready.
