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EDS-408A/405A Series User’s Manual Featured Functions
3-16
Trap Community
Setting Description Factory Default
character string
Use a community string match for
authentication; Maximum of 30 characters.
public
Private MIB information
Switch Object ID
Setting Description Factory Default
8691.7.1 EDS’s enterprise value Fixed
This value cannot be changed.
Using Communication Redundancy
Setting up Communication Redundancy on your network helps protect critical links against failure,
protects against network loops, and keeps network downtime at 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 be used on the network simultaneously. 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 Turbo Ring Concept
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.