Overview Of Redundancy Procedure - Hirschmann RS20 Programming Manual

Introduction
1.1 Overview of
Redundancy Procedure
Redundancy Network topology
procedure
RSTP Random structure
Note: Up to 79 devices possible, depending on topology and configuration. If
the default values are being used, up to 39 devices are possible, depending on
the topology
HIPER-Ring Ring
MRP-Ring Ring
Note: In combination with RSTP in MRP compatibility mode, up to 39 devices
are possible, depending on the configuration. If the default values for RSTP are
being used, up to 19 devices are possible
Fast HIPER- Ring
Ring (RSR20,
RSR30 and
MACH 1000)
Sub-Ring Ring segment
(RSR20, coupled to basis ring
RSR30 and
MACH 1000)
Redundant Coupling of network
coupling segment/rings via a
main line and a
redundant line
Link Coupling of network
Aggregation segments via parallel
active lines with
dynamic load distri-
bution and line
redundancy
Table 1: Comparison of the redundancy procedures
Note: Informations concerning the switching time you can find on the
Hirschmann internet site (www.hirschmann-ac.com) at the end of the product
site.
10

1.1 Overview of Redundancy Procedure

Switching time
typically < 1 s (STP < 30 s), up to < 30 s - depends
heavily on the number of devices
(see page 81).
typically 80 ms, up to < 500 ms - practically indepen-
dently of the number of devices
typically 80 ms, up to < 500 ms - practically indepen-
dently of the number of devices
< 10 ms with 5 devices in ring.
With more than 5 devices, the switching time increases.
typically 80 ms, up to < 500 ms - practically indepen-
dently of the number of devices
typically 150 ms, up to < 500ms
(see page 81).
Redundanz L2P
Release 5.0 04/09