Accton Technology ES4626 - Manual (Page 823)

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Chapter 21 MRPP Configuration
21.1 MRPP introduction
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.
21.1.1 Conception Introduction
SWITCH A
SWITCH B
SWITCH D
SWITCH C
SWITCH E
SWITCH F
SWITCH G
SWITCH H
Master
Node
Ring 1
Ring 2
Master Node
E1
E2
E2
E1
Fig 21-1MRPP 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.