Transition Networks
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–CHAS L2/L3 Switch User Guide
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4. Redundancy
Redundancy for minimized system downtime is one of the most important concerns for industrial
networking devices. Hence, Transition Networks has developed redundancy technologies
including Redundant-Ring and Open-Ring featuring faster recovery time than existing redundancy
technologies widely used in commercial applications, such as STP, RSTP, and MSTP.
Transition Networks
’ redundancy technologies not only support different networking topologies,
but also assure the reliability of the network.
4.1 Redundant Ring Technology
4.1.1 Introduction
The switch provides redundant ring technology with recovery time of less than 30 milliseconds (in
full-duplex Gigabit operation) or 10 milliseconds (in full-duplex Fast Ethernet operation) and up to
250 nodes. The ring 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. The redundant ring technology can protect
mission-critical applications from network interruptions or temporary malfunction with its fast
recovery technology.
