Rrpp Configuration; Rrpp Overview; Background; Basic Concepts In Rrpp - H3C S9500E Series Configuration Manual

RRPP configuration

RRPP overview

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.
RRPP features fast topology convergence.

Background

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 as it needs dedicated hardware. In contrast, Ethernet ring
technology is more mature and economical, so it is more and more widely used in MANs and
enterprise networks.
Both STP and RRPP can be used to eliminate Layer 2 loops. STP is mature; however, it takes
several seconds to converge. RRPP is an Ethernet ring-specific data link layer protocol, and
converges faster than STP. Additionally, the convergence time of RRPP is independent of the
number of nodes in the Ethernet ring, and therefore, RRPP can be applied to large-diameter
networks.

Basic concepts in RRPP

Figure 7 RRPP networking diagram
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