Moxa EDS-82810G [33/113] Eds 828 series featured functions

EDS-828 Series Featured Functions

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When configuring a redundant ring, all switches on the same ring must be configured to use the same

redundancy protocol. You cannot mix the “Turbo Ring,” “Turbo Ring V2,” and STP/RSTP protocols on the same

ring. The following table 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 V2 Turbo Ring Turbo Chain STP RSTP

Topology Ring Ring Chain Ring, Mesh Ring, Mesh

Recovery

Time

< 20 ms < 300 ms < 20 ms Up to 30 seconds Up to 5 seconds

NOTE

Most of Moxa’s managed switches now support two proprietary Turbo Ring protocols:

1. “Turbo Ring” refers to the original version of Moxa’s proprietary redundant ring protocol, which has a

recovery time of under 300 ms.

2. “Turbo Ring V2” refers to the new generation Turbo Ring, which has a recovery time of under 20 ms.

In this manual, we use the terminology “Turbo Ring” ring and “Turbo Ring V2” ring to differentiate between

rings configured for one or the other of these protocols.

Gigabit Ethernet Redundant Ring Capability (< 50 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. The EDS-828, 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 less than 300 ms (Turbo Ring) or 50 ms (Turbo Ring V2).

The Turbo Ring Concept

The Turbo Ring and Turbo Ring V2 protocols identify one switch as the master of the network, and then

automatically block packets from traveling through any of the network’s redundant loops. In the event that one

branch of the ring gets disconnected from the rest of the network, the protocol automatically readjusts the ring

so that the part of the network that was disconnected can reestablish contact with the rest of the network.

Initial Setup of a “Turbo Ring” or “Turbo Ring V2” ring.

For each switch in the ring select any two ports as the

redundant ports.

Connect redundant ports on neighboring switches to

form the redundant ring.

The user does not need to configure any of the switches as the master to use Turbo Ring or Turbo Ring V2. If

none of the switches in the ring is configured as the master, then the protocol will automatically assign master

status to one of the switches. In fact, the master is only used to identify which segment in the redundant ring

acts as the backup path. In the following subsections, we explain how the redundant path is selected for rings

configured for Turbo Ring, and Turbo Ring V2.