1140 CHAPTER 90: RRPP CONFIGURATION
RRPP domain
The interconnected devices with the same domain ID and control VLANs constitute
an RRPP domain. An RRPP domain contains multiple RRPP rings, in which one ring
serves as the primary ring and other rings serve as sub rings. You can set a ring as
either the primary ring or a sub ring.
As shown in Figure 343, Domain 1 is an RRPP domain, including two RRPP rings:
Ring 1 and Ring 2. All the nodes on the two RRPP rings belong to the RRPP
domain.
RRPP ring
A ring-shaped Ethernet topology is called an RRPP ring. An RRPP domain is built
up on an RRPP ring. An RRPP ring falls into primary ring and sub ring. Both levels
are set to 0 and 1 respectively when configuration.
As shown in Figure 343, Domain 1 contains two RRPP rings: Ring 1 and Ring 2.
Ring 1 level is set to 0, meaning the primary ring; Ring 2 level is set to 1, meaning
the sub ring.
For a ring, there are two cases:
■ Health state: All the physical links on the Ethernet ring are connected.
■ Disconnect state: Some physical link on the Ethernet ring fails.
Control VLAN and data VLAN
■ Control VLAN is a VLAN specially designed to transfer RRPP packets. The ports
accessing an RRPP ring on devices belong to the control VLAN of the ring and
only these ports can join this VLAN. IP address configuration is prohibited on
the ports of the control VLAN. You can configure a control VLAN for the
primary ring (namely the primary control VLAN). However, the control VLAN of
a sub ring (namely the secondary control VLAN) is assigned automatically by
the system and its VLAN ID is the control VLAN ID of the primary ring plus 1.
■ Data VLAN is a VLAN designed to transfer data packets, including the ports
accessing the Ethernet ring and other ports on devices.
Node
Every device on an RRPP ring is referred to as a node. Node mode includes:
■ Master node: Each ring has a master node primarily used to make loop
detection and loop guard.
■ Transit node: All the nodes excluding the master node on the primary ring; and
all the nodes on a sub ring except for the master node and the nodes where
the primary ring intersects with the sub ring.
■ Edge node: A node residing on the primary ring and a sub ring at the same
time. The node is a special transit node that serves as a transit node on the
primary ring and an edge node on the sub ring.
■ Assistant-edge node: A node residing on the primary ring and a sub ring at the
same time. The node is a special transit node that serves as a transit node on
the primary ring and an assistant-edge node on the sub ring. This node is used
in conjunction with the edge node to detect the integrity of the primary ring
and perform loop guard.
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