I read some information about Rapid Dual Homing from JetNet 5020G,the figure below is the introduction of Rapid Dual Homing.

enter image description here

Honestly,i don't understand why can the rapid dual homing have multiple redundancies from its introduction,after i study it, i have some thinking and some questions


A is other vendors ethernet switch,and B is the MSR ethernet switch,and both of them comprise a ring,so the main function of rapid dual homing is that let two different vendors switches be connected and work functionally without any problems.

Q1: If my thinking is right,why can the connection of two rings ,which are combined with different vendors switches,have multiple redundancies?

Q2:The introduction says " uplink can be auto-detected,and gathered into groups,each group path is sorted into primary,secondary and standby ",what does it have some relation with its figure?because i cannot understand this introduction from its figure.

Can anyone explain the introduction of Rapid Dual Homing to me ?thanks a lot

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    Commented Nov 19, 2022 at 23:22

1 Answer 1


Rapid Dual Homing is Korenix's marketing term for redundant meshing of Ethernet with 'rapid' failover (50 ms for ERPS). It encompasses multiple standard protocols:

  • ERPS V1 (Ethernet Ring Protection Switching V1)
  • ERPS V2 (Ethernet Ring Protection Switching V2)
  • RSTP (Rapid Spanning Tree Protocol)

See https://www.contradata.it/it/korenix-ethernet-switches-redundancy-at-all-levels

How it interacts with other vendors' devices depends in the configuration.

There's a lot of marketing bla, I think it's wise to look at the basic protocols to make a more educated choice. Generally, I'd recommend building a redundant tree for Ethernet instead of double rings or chains.

  • Can i ask that what is the meaning of " up link " in the introduction? Commented Oct 2, 2021 at 10:20
  • An uplink is a link towards the center of the network.
    – Zac67
    Commented Oct 2, 2021 at 10:47
  • so the center of the network may be a switch too? Commented Oct 2, 2021 at 13:09
  • @user16266657 Yes, most likely a switch (or a pair of).
    – Zac67
    Commented Oct 2, 2021 at 15:24
  • so can i say that the uplink is actually the switch sends the signal to another switch Commented Oct 2, 2021 at 23:14

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