H3C S7500 Series Operation Manual page 938

Operation Mannual – RRPP
H3C S7500 Series Ethernet Switches
I. Domain
A domain consists of switches with the same domain ID and control VLAN. A domain
can consist of multiple Ethernet rings, only one of which is the primary ring and the
others are subrings. The ring roles are determined by user configuration.
As shown in
1 and ring 2. All the nodes on the Ethernet rings belong to the RRPP domain.
II. Ethernet ring
An Ethernet ring is a ring-shaped Ethernet topology, on which a RRPP domain is based.
An RRPP domain consists of a primary ring and one or more subrings. In configuration,
the level of the primary ring is level 0, and that of the subrings is level 1.
As shown in
set to level 0 and level 1 respectively, ring 1 is the primary ring and ring 2 is the subring.
Each ring is in one of the following two states:
Healthy state: The physical links of the ring network are connected.
Broken state: A certain physical link is disconnected on the ring network.
III. Control VLAN and data VLAN
A control VLAN is a special VLAN used to transfer RRPP packets. The port on
each switch for connecting the switch with the Ethernet ring belongs to the control
VLAN, and only the ports connected to the Ethernet ring can be added to the
control VLAN. It is not allowed to configure an IP address for the interface of the
control VLAN. You can configure the control VLAN of the primary ring. The control
VLAN of the subring is assigned by the system automatically. The ID of the subring
control VLAN is the ID of the primary ring control VLAN plus 1.
A data VLAN is used to transfer data packets. A data VLAN contains the ports
connecting the switch with the Ethernet ring network and other ports.
IV. Node
Every switch on an Ethernet ring network is a node. Node roles are as follows:
Master node: The node that initiates loop detection and prevents data loops is the
master node. Each ring has one and only one master node.
Transit node: All nodes other than the master node on a ring are transit nodes.
Edge node: A node located on the primary ring and a subring at the same time. An
edge node serves as a transit node on the primary ring and an edge node on a
subring. In an RRPP domain, there are two edge nodes on a subring. You must
specify one of them as an assistant edge node so far the configuration can tell the
difference between the edge node and assistant edge node.
The node roles are determined by user configuration. As shown in
is the master node on ring 1. Switch B, Switch C, and Switch D are transit nodes on ring
Figure 1-1, Domain 1 is an RRPP domain, which consists of Ethernet ring
Figure 1-1, RRPP domain 1 consists of ring 1 and ring 2. If their levels are
1-2
Chapter 1 RRPP Configuration
Figure 1-1, Switch A