User's Manual

Table Of Contents

Configuration Guide of XGS-5240-Series

62-1

Chapter 62 MRPP Configuration

62.1 Introduction to MRPP

MRPP (Multi-layer Ring Protection Protocol), is a link layer protocol applied on Eth

ernet loop protection. It can avoid broadcast storm caused by data loop on Ethernet rin

g, and restore communication among every node on ring network when the Ethernet rin

g 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.

62.1.1 Conception Introduction

Fig 3-1

MRPP Sketch Map

1. Control VLAN

Control VLAN is a virtual VLAN, only used to identify MRPP protocol packet transf

erred in the link. To avoid confusion with other configured VLAN, avoids configuring co

ntrol 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.

SWITCH C

SWITCH A SWITCH B

SWITCH D

SWITCH E

SWITCH F

SWITCH H

SWITCH G

Master Node

Ring 1 Ring 2

Master

Node