HP 5130 EI Series Configuration Manual page 55

In an RRPP domain, a control VLAN is dedicated to transferring RRPPDUs. On a device, the ports
accessing an RRPP ring belong to the control VLANs of the ring, and only these ports can join the
control VLANs.
An RRPP domain is configured with the following control VLANs:
One primary control VLAN, which is the control VLAN for the primary ring.
One secondary control VLAN, which is the control VLAN for subrings.
After you specify a VLAN as the primary control VLAN, the system automatically configures the
secondary control VLAN. The VLAN ID is the primary control VLAN ID plus one. All subrings in the
same RRPP domain share the same secondary control VLAN. IP address configuration is prohibited
on the control VLAN interfaces.
2. Data VLAN
A data VLAN is 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 topology change.
Transit node—On the primary ring, transit nodes refer to all nodes except the master node. On the
•
subring, transit nodes refer to all nodes except the master node and the nodes where the primary
ring intersects with the subring. 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 determines the operations to be performed.
Edge node—A special node residing on both the primary ring and a subring at the same time. An
•
edge node acts as a master node or transit node on the primary ring and as an edge node on the
subring.
Assistant edge node—A special node residing on both the primary ring and a subring at the same
•
time. An assistant edge node acts as a master node or transit node on the primary ring and as an
assistant edge node on the subring. This node works in conjunction with the edge node to detect the
integrity of the primary ring and to perform loop guard.
As shown in
of Ring 1. Device B, Device C, and Device D are the transit nodes of Ring 1. Device E is the master node
of Ring 2, Device B is the edge node of Ring 2, and Device C is the assistant edge node of Ring 2.
Port
1. Primary port and secondary port
Each master node or transit node has two ports connected to an RRPP ring, a primary port and a
secondary port. You can determine the role of a port.
In terms of functionality, the primary port and the secondary port of a master node have the
following differences:
The primary port and the secondary port are designed to play the role of sending and receiving
Hello packets, respectively.
When an RRPP ring is in Health state, the secondary port logically denies data VLANs and
permits only the packets from the control VLANs.
Figure 12, Ring 1 is the primary ring and Ring 2 is a subring. Device A is the master node
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