H3C S9500E Series Configuration Manual page 55

Intersecting rings
As shown in Figure 10, there are two or more rings in the network topology and two common
nodes between rings. In this case, you only need to define an RRPP domain, and configure one
ring as the primary ring and the other rings as subrings.
Figure 10 Schematic diagram for an intersecting-ring network
Master node
Transit node
Dual homed rings
As shown in Figure 11, there are two or more rings in the network topology and two similar
common nodes between rings. In this case, you only need to define an RRPP domain, and
configure one ring as the primary ring and the other rings as subrings.
Figure 11 Schematic diagram for a dual-homed-ring network
Domain 1
Device A
Device B
Ring 1
Device C
Device D
Assistant edge node
Edge node
Master node
Ring 2
Device E
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