HSR Standard Ed. 3 Introduces Mode X
Edition 3 of IEC 62439-3 has been approved on January 8th, 2016. IEC 62439-3 is the standard for High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP).
Flexibilis Redundant Switch (FRS) supports the new edition, including the HSR Mode X it introduces. In HSR Mode X, nodes discard the duplicates in opposite direction. This reduces the amount of network load caused by the multicasts to about half and frees resources for other uses.