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  #
  # IEC 62439-3 High-availability Seamless Redundancy
  #
  
  config HSR
  	tristate "High-availability Seamless Redundancy (HSR)"
  	---help---
  	  If you say Y here, then your Linux box will be able to act as a
  	  DANH ("Doubly attached node implementing HSR"). For this to work,
  	  your Linux box needs (at least) two physical Ethernet interfaces,
  	  and it must be connected as a node in a ring network together with
  	  other HSR capable nodes.
  
  	  All Ethernet frames sent over the hsr device will be sent in both
  	  directions on the ring (over both slave ports), giving a redundant,
  	  instant fail-over network. Each HSR node in the ring acts like a
  	  bridge for HSR frames, but filters frames that have been forwarded
  	  earlier.
  
  	  This code is a "best effort" to comply with the HSR standard as
  	  described in IEC 62439-3:2010 (HSRv0), but no compliancy tests have
  	  been made.
  
  	  You need to perform any and all necessary tests yourself before
  	  relying on this code in a safety critical system!
  
  	  If unsure, say N.