Rrpp Configuration; Background; Basic Concepts In Rrpp - HP A5830 series Configuration Manual

RRPP configuration

The RRPP is a link layer protocol designed for Ethernet rings. RRPP can prevent broadcast storms caused
by data loops when an Ethernet ring is healthy, and rapidly restore the communication paths between
the nodes in the event that a link is disconnected on the ring.

Background

Metropolitan area networks MANs and enterprise networks usually use the ring structure to improve
reliability. However, services will be interrupted if any node in the ring network fails. A ring network
usually uses RPR or Ethernet rings. RPR is high in cost because it needs dedicated hardware. Contrarily,
the Ethernet ring technology is more mature and economical, so it is increasingly widely used in MANs
and enterprise networks.
RSTP, PVST, MSTP, and RRPP can eliminate Layer-2 loops. RSTP, PVST, and MSTP are mature. However,
they take several seconds to converge. RRPP is an Ethernet ring-specific data link layer protocol, and it
converges faster than RSTP, PVST, and MSTP. Also, the convergence time of RRPP is independent of the
number of nodes in the Ethernet ring. You can apply RRPP to large-diameter networks.

Basic concepts in RRPP

Figure 13 RRPP networking diagram
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
nodes on the two RRPP rings belong to the RRPP domain.
13, Domain 1 is an RRPP domain, including two RRPP rings: Ring 1 and Ring 2. All
Figure
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