R3102-R3103-HP 6600/HSR6600 Routers High Availability Configuration Guide
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RRPP domain
The interconnected devices with the same domain ID and control VLANs constitute an RRPP domain.
An RRPP domain contains the following elements—primary ring, subring, control VLAN, master node,
transit node, primary port, secondary port, common port, edge port, and so on.
As shown in Figure 17, 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". RRPP rings include primary rings and
subrings. You can configure a ring as either the primary ring or a subring by specifying its ring level.
The primary ring is of level 0, and a subring is of level 1. An RRPP domain contains one or multiple
RRPP rings, one serving as the primary ring and the others serving as subrings. A ring can be in one
of the following states:
Health state—All physical links on the Ethernet ring are connected.
Disconnect state—Some physical links on the Ethernet ring are broken.
As shown in Figure 17, Domain 1 contains two RRPP rings: Ring 1 and Ring 2. The level of Ring 1 is
set to 0, and that of Ring 2 is set to 1. Ring 1 is configured as the primary ring, and Ring 2 is
configured as a subring.
Control VLAN and data VLAN
1. Control VLAN.
In an RRPP domain, a control VLAN is a VLAN dedicated to transferring Rapid Ring Protection
Protocol Data Units (RRPPDUs). On a device, the ports accessing an RRPP ring belong to the
control VLANs of the ring, and only such ports can join the control VLANs.
An RRPP domain is configured with two control VLANs: one primary control VLAN, which is the
control VLAN for the primary ring, and one secondary control VLAN, which is the control VLAN
for subrings. All subrings in the same RRPP domain share the same secondary control VLAN.
After you specify a VLAN as the primary control VLAN, the system automatically configures the
VLAN whose ID is the primary control VLAN ID plus one as the secondary control VLAN.
IP address configuration is prohibited on the control VLAN interfaces.
2. Data VLAN.
A data VLAN is a VLAN dedicated to transferring data packets. Both RRPP ports and non-RRPP
ports can be assigned to a data VLAN.
Node
Each device on an RRPP ring is a node. The role of a node is configurable. RRPP has the following
node roles:
Master node—Each ring has only one master node. The master node initiates the polling
mechanism and determines the operations to be performed after a change in topology.
Transit node—Transit nodes include all nodes except the master node on the primary ring and all
nodes on subrings except the master nodes and the nodes where the primary ring intersects with
the subrings. A transit node monitors the state of its directly-connected RRPP links and notifies the
master node of the link state changes, if any. Based on the link state changes, the master node
decides the operations to be performed.
Edge node—A node residing on both the primary ring and a subring at the same time. An edge
node is a special transit node that serves as a transit node on the primary ring and an edge
node on the subring.