User`s manual

EDS-828 Series Featured Functions
3-20
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 th
is 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.