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Chapter 51 MRPP Configuration
51.1 Introduction to MRPP
MRPP (Multi-layer Ring Protection Protocol), is a link layer protocol applied on Ethernet loop
protection. It can avoid broadcast storm caused by data loop on Ethernet ring, and restore
communication among every node on ring network when the Ethernet ring has a break link.
MRPP is the expansion of EAPS (Ethernet link automatic protection protocol).
MRPP protocol is similar to STP protocol on function, MRPP has below characters, compare
to STP protocol:
<1> MRPP specifically uses to Ethernet ring topology
<2> fast convergence, less than 1 s. ideally it can reach 100-50 ms.
51.1.1 Conception Introduction
MRPP Sketch Map
1. Control VLAN
Control VLAN is a virtual VLAN, only used to identify MRPP protocol packet transferred in the
link. To avoid confusion with other configured VLAN, avoids configuring control VLAN ID to be
the same with other configured VLAN ID. The different MRPP ring should configure the
different control VLAN ID.
2. Ethernet Ring (MRPP Ring)
Ring linked Ethernet network topology.
Each MRPP ring has two states.
Health state: The whole ring net work physical link is connected.
Break state: one or a few physical link break in ring network
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