T-REC-G[1][1].Imp8032-201006-I!!MSW-E

International Telecommunication Union

ITU-T G.8032/Y.1344

Implementers’ Guide

TELECOMMUNICATION

STANDARDIZATION SECTOR

OF ITU

(11 June 2010)

SERIES G: TRANSMISSION SYSTEMS AND MEDIA,

DIGITAL SYSTEMS AND NETWORKS

Packet over Transport aspects – Ethernet over Transport

aspects

SERIES Y: GLOBAL INFORMATION

INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS

AND NEXT-GENERATION NETWORKS

Internet protocol aspects – Transport

Ethernet ring protection switching -

Implementers' Guide 2

Implementers’ Guide for Recommendation ITU-T G.8032/Y.1344 (2010-06) 2 Implementers’ Guide to Recommendation ITU-T G.8032/Y.1344

Ethernet ring protection switching - Implementers' Guide

Summary

This Implementers’ Guide identifies terms originally listed in Rec. G.8032/Y.1344, which can now

be removed from that Rec. and replaced with text pointing to the appropriate Terminology Rec. for

the definition. This Implementers’ Guide should remain in force until such time as Rec.

G.8032/Y.1344 is revised and reissued.

Introduction

Study Group 15 has agreed to the development of a single source Recommendation for definitions

currently found in Working Party 3 Ethernet Frames over Transport Recommendations. However,

not all affected Recommendations are currently in process for revision. To facilitate this transition,

this Implementers’ Guide identifies the terms which can be removed and replaced when the initial

source Recommendation is revised and reissued. This Implementers’ Guide should remain in force

until such time as Rec. G.8032/Y.1344 is revised and reissued. 3

Implementers’ Guide for Recommendation ITU-T G.8032/Y.1344 (2010-06) 3 Implementers’ Guide to Recommendation ITU-T G.8032/Y.1344

Ethernet ring protection switching - Implementers' Guide

Terms to be removed from Rec. G.8032/Y.1344

The following table identifies the target term, with appropriate replacement definition text for the

Recommendation identified in the title of this Implementers’ Guide.

Original Term Replacement text

3.1.7 This Recommendation uses the following

terms defined in ITU-T Rec. G.8010 and Y.1731:

a) maintenance entity (ME)

b) maintenance entity group (MEG)

c) maintenance entity group end point (MEP)

d) maintenance entity group level (MEL) 3.1.7 This Recommendation uses the following

terms defined in ITU-T Rec. G.8010 and Y.1731:

a) maintenance entity group end point (MEP)

b) maintenance entity group level (MEL) 4

Implementers’ Guide for Recommendation ITU-T G.8032/Y.1344 (2010-06) 4 Original Term Replacement text

3.2 This Recommendation defines the following

terms:

3.2.1. Ethernet Ring

An Ethernet Ring is a collection of Ethernet Ring

Nodes forming a closed physical loop whereby

each Ethernet Ring Node is connected to two

adjacent Ethernet Ring Nodes via a duplex

communications facility.

3.2.2. Ethernet Ring Node

An Ethernet Ring Node is a network element

which implements at least the following

functionality:

a) One Ethernet connection function (ETH_C)

with a dedicated Ethernet flow forwarding

function (ETH_FF) for forwarding R-APS control

traffic.

b) Two ring ports, including ETHDi/ETH

Adaptation function at the Ring maintenance

entity group level (MEL).

c) Ethernet Ring protection (ERP) control process

controlling the blocking and unblocking of traffic

over the ring ports.

3.2.3. ERP Instance

An ERP Instance is an entity that is responsible

for the protection of a subset of the VLANs that

transport traffic over the physical Ethernet Ring.

Each ERP Instance is independent of other ERP

Instances that may be configured on the physical

Ethernet Ring. 3.2 This Recommendation uses the following

terms defined in ITU-T Rec. G.8001/Y.1354:

a) maintenance entity (ME)

b) maintenance entity group (MEG)

c) Ethernet Ring

d) Ethernet Ring Node

e) ERP Instance

f) Interconnection Node

g) Major Ring

h) R-APS Virtual Channel

i) Ring MEL

j) Ring Protection Link (RPL)

k) RPL Neighbour Node

l) RPL Owner Node

m) Sub-Ring

n) Sub-Ring Link

o) Wait to Block timer

5

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3.2.4. Interconnection Node

An Interconnection Node is an Ethernet Ring

Node which is common to two or more Ethernet

Rings or to a Sub-Ring and an interconnected

network. At each Interconnection Node there may

be one or more Ethernet Rings that can be

accessed through a single ring port and not more

than one Ethernet Ring that is accessed by two

ring ports. The former set of Ethernet Rings is

comprised of Sub-Rings, whereas the latter

Ethernet Ring is considered a Major Ring, relative

to this Interconnection Node. If the

Interconnection Node is used to connect a (set of)