Hirschmann RS20 User Manual page 33

Ring Redundancy
The displays in the "Information" frame mean
– "Redundancy existing": One of the lines affected by the function may
be interrupted, with the redundant line then taking over the function
of the interrupted line.
– "Configuration failure": The function is incorrectly configured or the
cable connections at the ring ports are improperly configured (e.g.,
not plugged into the ring ports).
Note: If you want to use link aggregation connections in the HIPER-Ring
(PowerMICE and MACH 4000), you enter the index of the desired link
aggregation entry for the module and the port.
UM RedundConfig L2P
Release 8.0 05/2013
3.1 Example of a HIPER-Ring
33