User`s manual

TN-5516/5518 Series Featured Functions
3-29
The Turbo Chain Concept
Moxa developed the proprietary Turbo Chain protocol to optimize communication redundancy and achieve a
fast network recovery time. Turbo Chain is an advanced software-technology that gives network administrators
the flexibility of being able to construct any type of redundant network topology. With the “chain” concept, the
user only needs to connect the Ethernet switches in a chain and then simply link the two ends of the chain to
an Ethernet network. An illustration is shown below.
The Turbo Chain protocol designates one switch as the head switch, one switch as the tail switch, and the
other switches as the member switches of the network. Packets are initially blocked from travelling through
the backup path that is on the tail switch.
Turbo Chain can be used on industrial networks that require complex topologies as well as communication
redundancy. If you have a large industrial network and were originally planning to use a multi-ring architecture,
then you can use Turbo Chain to provide a fast media-recovery time. Turbo Chain allows you to expand your
network when needed without changing the configuration of the existing network. Turbo Chain can also
co-work with existing RSTP networks. The following illustrations show Turbo Chain’s versatility with different
network topologies.
Turbo
Chain 4
Turbo
Chain 3
Turbo
Chain 1
Turbo
Chain 2
Blocking Port
LAN Network
Member Member Member
Head
Tail