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Application of Intersecting RRPP Rings
Metro Ethernet typically uses two-layer rings:
One layer is the aggregation layer between aggregation devices PE-AGGs.
The other layer is the access layer between PE-AGGs and UPEs
Intersecting RRPP rings can be used in this scenario, as shown in Figure 18-22. The aggregation layer is the RRPP major ring and the access layer is the RRPP sub-ring.