High Availability Theoretical Basics - Schneider Electric

High Availability with Collaborative Control System
The new release of TCSESM ConneXium switches allows better performance of
RSTP management with a detection time of 15 ms and a propagation time of 15 ms
for each switch. Considering a 6 switches configuration, the recovery time is about
105 ms.
HIPER-Ring (Version 1)
Version 1 of the HIPER-Ring networking strategy has been available for
approximately 10 years. It applies to a Self Healing Ring networking layout.
Such a ring structure may include up to 50 switches. It typically features a
reconfiguration delay of 150 milliseconds 2 and a maximum time of 500 ms. As a result,
in case of an issue occurring on a link cable or on one of the switches populating the
ring, the network will take about 150 ms to detect this event, and cause the
Redundancy Manager switch to close the loop.
Note: The Redundancy Manager switch is said to be active when it opens the
network.
HIPER-Ring Version 2 (MRP)
Note: If recovery time of 500 ms is acceptable, then no switch redundancy
configuration is needed only dip switches have to be set up.
2 When configuring a Connexium TCS ESM switch for HIPER-Ring V1, the user is asked to choose
between a maximum Standard Recovery Time, which is 500 ms, and a maximum Accelerated Recovery
Time, which is 300 ms.
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