H3C Technologies H3C S10500 Series Switches - Manual (Page 66)

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Intersecting rings
As shown in
Figure
16 , two or more rings are in the network topology and two common nodes exist
between rings. You only need to define an RRPP domain and configure one ring as the primary ring and
the other rings as subrings.
Figure 16 Schematic diagram for an intersecting-ring network
Dual homed rings
As shown in
Figure
17 , two or more rings are in the network topology and two similar common nodes
exist between rings. You only need to define an RRPP domain and configure one ring as the primary ring
and the other rings as subrings.
Figure 17 Schematic diagram for a dual-homed-ring network
Single-ring load balancing
In a single-ring network, you can achieve load balancing by configuring multiple domains.
As shown in
Figure
18 , Ring 1 is configured as the primary ring of both Domain 1 and Domain 2.
Domain 1 and Domain 2 are configured with different protected VLANs. In Domain 1, Device A is
configured as the master node of Ring 1. In Domain 2, Device B is configured as the master node of Ring
1. Such configurations enable the ring to block different links based on VLANs, and single-ring load
balancing is achieved.