1# SPDX-License-Identifier: GPL-2.0-only 2# 3# IEC 62439-3 High-availability Seamless Redundancy 4# 5 6config HSR 7 tristate "High-availability Seamless Redundancy (HSR)" 8 help 9 If you say Y here, then your Linux box will be able to act as a 10 DANH ("Doubly attached node implementing HSR"). For this to work, 11 your Linux box needs (at least) two physical Ethernet interfaces, 12 and it must be connected as a node in a ring network together with 13 other HSR capable nodes. 14 15 All Ethernet frames sent over the hsr device will be sent in both 16 directions on the ring (over both slave ports), giving a redundant, 17 instant fail-over network. Each HSR node in the ring acts like a 18 bridge for HSR frames, but filters frames that have been forwarded 19 earlier. 20 21 This code is a "best effort" to comply with the HSR standard as 22 described in IEC 62439-3:2010 (HSRv0) and IEC 62439-3:2012 (HSRv1), 23 but no compliancy tests have been made. Use iproute2 to select 24 the version you desire. 25 26 You need to perform any and all necessary tests yourself before 27 relying on this code in a safety critical system! 28 29 If unsure, say N. 30