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EDS-508 Series User’s Manual Featured Functions
3-17
Trap Settings
Setting Descriptions Factory Default
Trap Server
IP/Name
Enter the IP address or name of the Trap
Server used by your network.
None
Trap Community
Use a community string match for
authentication; Maximum of 30
characters.
public
Private MIB information
The private SNMP Object ID of the EDS is the enterprise value: 8691.7.1. This number is cannot
be changed.
Using Communication Redundancy
Setting up Communication Redundancy on your network helps protect critical links against failure,
protects against network loops, and reduces network downtime to a minimum.
The Communication Redundancy function allows the user to set up redundant loops in the
network to provide a backup data transmission route in the event that a cable is inadvertently
disconnected or damaged. This is a particularly important feature for industrial applications, since
it could take several minutes to locate the disconnected or severed cable. For example, if MOXA
EtherDevice Switch is used as a key communications component of a production line, several
minutes of downtime could cause a big loss in production and revenue. MOXA Ethernet Device
Switch supports two different protocols to support this communication redundancy
function—Rapid Spanning Tree Protocol (IEEE-802.1W) and Turbo Ring.
Turbo Ring and STP/RSTP cannot both be used on the network at the same time. The table below
lists the key differences between each feature, so you can evaluate the benefits of each to
determine which feature is most suitable for your network.
Turbo Ring STP RSTP
Topology Ring Ring, Mesh Ring, Mesh
Recovery Time < 300 ms Up to 30 sec. Up to 5 sec
The Concept of Turbo Ring
Moxa developed the proprietary Turbo Ring protocol to optimize communication redundancy and
achieve a faster recovery time on the network.
Turbo Ring protocol identifies one switch as the “master” of the network, and then automatically
blocks packets from traveling through any of the network’s redundant loops. In the event that one
branch of this ring becomes disconnected from the rest of the network, the Turbo Ring protocol
automatically readjusts the ring (if possible) so that the part of the network that was disconnected
can reestablish contact with the rest of the network.