Huawei S3700-52P-PWR-SI 02354132 User Manual
Product codes
02354132
3.3.1 RRPP Ring Network Composition
An RRPP domain consists of a group of S3700s with the same domain ID and control VLAN
ID. An RRPP domain consists of the following elements:
ID. An RRPP domain consists of the following elements:
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A physical RRPP ring maps a ring-shaped Ethernet topology. An RRPP domain is
composed of multiple rings connected with each other. One of them is the primary ring and
the others are subrings.
composed of multiple rings connected with each other. One of them is the primary ring and
the others are subrings.
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An RRPP domain can be configured with a main control VLAN and a sub control VLAN.
The main control VLAN transmits packets of the primary ring; the sub control VLAN
transmits packets of subrings.
The main control VLAN transmits packets of the primary ring; the sub control VLAN
transmits packets of subrings.
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A control VLAN transmits only RRPP packets; a data VLAN transmits only data packets.
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The master node initiates the polling and determines how to handle topology changes.
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The transit node monitors the status of its directly connected RRPP links. When the link
status changes, the transit node notifies the master node. The master node then decides how
to handle the change.
status changes, the transit node notifies the master node. The master node then decides how
to handle the change.
3.3.2 How Does RRPP Work
The master node on a ring has a primary interface and a secondary interface. The primary
interface on the master node periodically transmits hello messages. If the secondary interface
on the master node receives the hello messages, it indicates that the path is a closed ring, and
the master node blocks the secondary interface. This prevents loops on the network.
interface on the master node periodically transmits hello messages. If the secondary interface
on the master node receives the hello messages, it indicates that the path is a closed ring, and
the master node blocks the secondary interface. This prevents loops on the network.
If the secondary interface on the master node fails to receive a hello message in a certain period,
it indicates that the link on the ring is faulty, and the master node opens the secondary interface.
it indicates that the link on the ring is faulty, and the master node opens the secondary interface.
3.3.3 Various Topologies
Single RRPP Ring
There is only one Ethernet ring on a network and only one RRPP domain exists. In this case,
the network can respond to topology changes quickly. The fast convergence of the RRPP ring
is thus performed and Layer 2 and Layer 3 services can be quickly switched.
the network can respond to topology changes quickly. The fast convergence of the RRPP ring
is thus performed and Layer 2 and Layer 3 services can be quickly switched.
Tangent RRPP Rings
There are two or more Ethernet rings on a network and only one public node exits between each
pair of rings. The rings belong to different RRPP domains.
pair of rings. The rings belong to different RRPP domains.
This networking is suitable for large-scale networks that need to be managed in different
domains. When one ring is faulty or recovers, other domains are not affected. The convergence
process of the RRPP ring in the local domain is the same as the convergence process of a sing
RRPP ring.
domains. When one ring is faulty or recovers, other domains are not affected. The convergence
process of the RRPP ring in the local domain is the same as the convergence process of a sing
RRPP ring.
Intersecting RRPP Rings
There are two or more Ethernet rings on a network and two public nodes exit between each pair
of rings. The rings belong to the same RRPP domain. One ring is the primary ring, and the others
are the subrings.
of rings. The rings belong to the same RRPP domain. One ring is the primary ring, and the others
are the subrings.
The protocol packets on a subring are transmitted through the channel between the two interfaces
connecting the primary ring and the subring. The primary ring can be considered as a node on
connecting the primary ring and the subring. The primary ring can be considered as a node on
S3700HI Ethernet Switches
Product Description
Product Description
3 Link Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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