Moxa Technologies EDS-508 Using Communication Redundancy, Private MIB information, Trap Settings

EDS-508 Series User’s ManualFeatured Functions

Trap Settings

Setting	Descriptions	Factory Default
Trap Server	Enter the IP address or name of the Trap	None
IP/Name	Server used by your network.
	Use a community string match for	public
Trap Community	authentication; Maximum of 30
	characters.

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.

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