H3C Technologies H3C S12500 Series Switches - Manual (Page 74)

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Figure 16 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 17 , 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 from different VLANs to travel over different paths in the subring and primary ring, achieving
intersecting-ring load balancing.
Figure 17 Schematic diagram for an intersecting-ring load balancing network
Protocols and standards
RFC 3619, Extreme Networks' Ethernet Automatic Protection Switching (EAPS) Version 1 is related to
RRPP.
Device A Device B
Device C Device D
Domain 1 Ring 1 Domain 2
Device A Device B
Device C Device D
Device E
Ring 1
Ring 2 Domain 1 Domain 2