H3C S9500E Series Configuration Manual page 56

Single-ring load balancing
In a single-ring network, you can achieve load balancing by configuring multiple domains.
As shown in Figure 12, 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,
providing single-ring load balancing.
Figure 12 Schematic diagram for a single-ring load balancing network
Intersecting-ring load balancing
In an intersecting-ring network, you can also achieve load balancing by configuring multiple
domains.
As shown in Figure 13, Ring 1 is the primary ring and Ring 2 is the subring in both Domain 1
and Domain 2. Domain 1 and Domain 2 are configured with different protected VLANs. Device
A is configured as the master node of Ring 1 in Domain 1; Device D is configured as the master
node of Ring 1 in Domain 2.
Device E is configured as the master node of Ring 2 in both Domain 1 and Domain 2. However,
different ports on Device E are blocked in Domain 1 and Domain 2.
With the configurations, you can enable traffic of different VLANs to travel over different paths in
the subring and primary ring, achieving intersecting-ring load balancing.
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