Hirschmann GREYHOUND GRS1020, Справочное руководство

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Redundancy
12.1 Network Topology vs. Redundancy Protocols
149
UM Config GRS
Release 8.0 09/2019
For operating in this network topology, the device provides you with the following redundancy
protocols:

Rapid Spanning Tree (RSTP)
Ring topology
In networks with a line topology, you can use redundancy procedures by connecting the ends of
the line. This creates a ring topology.
Figure 27: Ring topology: Line topology with connected ends
For operating in this network topology, the device provides you with the following redundancy
protocols:

Media Redundancy Protocol (MRP)

Rapid Spanning Tree (RSTP)
12.1.2 Redundancy Protocols
For operating in different network topologies, the device provides you with the following redundancy
protocols:
Note: If you are using a redundancy function, then you deactivate the flow control on the
participating device ports. If the flow control and the redundancy function are active at the same
time, it is possible that the redundancy function operates differently than intended.
Table 25: Overview of redundancy protocols
Redundancy
protocol
Network
topology
Comments
MRP Ring The switching time can be selected and is practically
independent of the number of devices.
An MRP-Ring consists of up to 50 devices that support the MRP
protocol according to IEC 62439.
When you only use Hirschmann devices, up to 100 devices are
possible in the MRP-Ring.
Subring Ring The Sub Ring function enables you to easily couple network
segments to existing redundancy rings.
RSTP Random
structure
The switching time depends on the network topology and the
number of devices.

typ. < 1 s with RSTP

typ. < 30 s with STP
Link
Aggregation
Random
structure
A Link Aggregation Group is the combining of 2 or more, full-
duplex point-to-point links operating at the same rate, on a single
switch to increase bandwidth.
Link Backup Random
structure
When the device detects an error on the primary link, the device
transfers traffic to the backup link. You typically use Link Backup
in service-provider or enterprise networks.