Moxa Technologies EDS-726 Using Communication Redundancy, Private MIB information, Trap Community

EDS-726 Series User’s Manual			Featured Functions
Trap Community
	Setting	Description	Factory Default
	character string	Use a community string match for	public
		authentication (maximum of 30
		characters).
Private MIB information
Switch Object ID
	Setting	Description	Factory Default
	8691.7.1	EDS-726’s enterprise value	Fixed

NOTE: The Switch Object ID 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 EDS-726 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 EDS-726 supports two different protocols for 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. Use this information to evaluate the benefits of each, and then determine which features are 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

Gigabit Ethernet Redundant Ring Capability (< 300 ms)

Ethernet has become the default data communications medium for industrial automation applications. In fact, Ethernet is often used to integrate video, voice, and high-rate industrial application data transfers into one network. MOXA EDS-726, which comes equipped with a redundant Gigabit Ethernet protocol called Gigabit Turbo Ring, gives system maintainers a convenient means of setting up a versatile yet stable Gigabit Ethernet network. With Gigabit Turbo Ring, if any segment of the network gets disconnected, your automation system will be back to normal in under 300 ms.

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