H3C Technologies H3C S10500 Series Switches - Manual (Page 65)

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Typical RRPP networking
Here are several typical networking applications.
Single ring
As shown in
Figure
14 , only a single ring exists in the network topology. You only need to define an RRPP
domain.
Figure 14 Schematic diagram for a single-ring network
Tangent rings
As shown in
Figure
15 , two or more rings are in the network topology and only one common node exists
between rings. You must define an RRPP domain for each ring.
Figure 15 Schematic diagram for a tangent-ring network