Overview Of Redundancy Protocols - Hirschmann RS20 User Manual

Introduction
1.2 Overview of
Redundancy Protocols
Redundancy Network topology
procedure
RSTP Random structure
Note: Up to 79 devices possible, depending on topology and configuration. If
the default values (factory settings) are 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 (factory
settings) for RSTP are used, up to 19 devices are possible
Table 2: Comparison of the redundancy procedures
Note: When you are using a redundancy function, you deactivate the flow
control on the participating ports. Default setting: flow control deactivated
globally and activated on all ports.
If the flow control and the redundancy function are active at the same time,
there is a risk of the redundancy failing.
Redundancy L2B
Release 6.0 07/2010
Switch-over time
typically < 1 s (STP < 30 s), up to < 30 s - depends
heavily on the number of devices
(see page 39).
typically 80 ms, up to < 500 ms or < 300 ms (selectable)
- the number of switches has a minimal effect on the
switch-over time
typically 80 ms, up to < 500 ms or < 200 ms (selectable)
- the number of switches has a minimal effect on the
switch over time
1.2 Overview of
Redundancy Protocols
(see page 39).
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