Hirschmann GREYHOUND GRS1020, Справочное руководство

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Redundancy
12.8 Subring
181
UM Config GRS
Release 8.0 09/2019
12.8 Subring
The Sub Ring function is an extension of the Media Redundancy Protocol (MRP). This function lets
you couple a subring to a main ring using various network structures.
The Subring protocol provides redundancy for devices by coupling both ends of an otherwise flat
network to a main ring.
Setting up subrings has the following advantages:

Through the coupling process, you include the new network segment in the redundancy
concept.

Subrings allow easy integration of new areas into existing networks.

Subrings allow you easy mapping of the organizational structure of an area in a network
topology.

In an MRP ring, the failover times of the subring in redundancy cases are typically < 100 ms.
12.8.1 Subring description
The subring concept lets you couple new network segments to suitable devices in an existing ring
(main ring). The devices with which you couple the subring to the main ring are Subring Managers
(SRM).
Figure 43: Example of a subring structure
blue ring = Main ring
orange ring = Subring
red line = Redundant link
SRM = Subring Manager
RM = Ring Manager
The Subring Manager capable devices support up to 2 instances and thus manages up to
2 subrings at the same time.
The Sub Ring function lets you integrate devices that support MRP as participants. The devices with
which you couple the subring to the main ring require the Sub Ring Manager function.
Each subring can consist of up to 200 participants, excluding the Subring Managers themselves
and the devices between the Subring Managers in the main ring.
RM
1.1
1.2
1.1 1.2
1.1
1.2
1.1 1.2
1.1 1.2
1.1 1.2
1.3
S RM 1
S RM 2
1.1
1.2
1.3
1.1
1.2