3Com 4210G Series, Configuration Manual, Page: 738 / 1133

3-9
Figure 3-6
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 3-7 , 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 Domain 2. With the
configurations, you can enable traffic of different VLANs to travel over different paths in the subring and
primary ring, thus achieving intersecting-ring load balancing.
Figure 3-7
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.
RRPP Configuration Task List
You can create RRPP domains based on service planning, specify control VLANs and data VLANs for
each RRPP domain, and then determine the ring roles and node roles based on the traffic paths in
each RRPP domain.