H3C Technologies H3C S7500E Series Switches - Manual (Page 81)

7-10
Figure 7-5 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 7-6 , 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.
Thus, single-ring load balancing is achieved.
Figure 7-6 Schematic diagram for a single-ring load balancing network
Domain 1 Ring 1
Device A Device B
Device D Device C
Domain 2
Intersecting-ring load balancing
In an intersecting-ring network, you can also achieve load balancing by configuring multiple
domains.
As shown in Figure 7-7 , 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