ITU-T Study Group 15
Update for IEEE 802.1
Glenn Parsons
gparsons@nortelnetworks.com
Three Liaisons to IEEE 802.1
from ITU-T Study Group 15

Ethernet Activities in SG15


Optical Transport Networks & Technologies Standardization Workplan


To MEF, T1, IETF, TIA, OIF, IEEE 802, IEC, ATMF
Ethernet Services

May 2003
To MEF, OIF, IEEE 802.1, IEEE 802.3
To IEEE 802.1
Location of Relevant Information

Ethernet activities in SG15:
ITU-T LS15-23

Optical Transport Networks & Technologies Standardization Workplan
ITU-T LS15-49

January 2003
Ethernet Services in G.ethsrv:
ITU-T Q12/15 WD 70

January 2003
May 2003 (not yet sent)
ITU-T SG15 Liaisons and draft documents
ftp://sg15opticalt:otxchange@ftp.itu.int/tsg15opticaltransport/COMMUNICATIONS/index.html
May 2003
ITU-T Study Group 15
Ethernet Activities

Working Party 1 – Question 2
Network Access (Ethernet Access)
 G.985
100 Mb point-to-point Ethernet Access – Requirements &
Architecture
 G.ces
Circuit Emulation Services over Ethernet

SG 15 - Working Party 4 – Question 16
OTN Technology (Ethernet over Fibre)


G.capp
CWDM Applications (including Ethernet)
SG 15 - Working Party 5 - Questions 1 & 19
Projects and Promotion (Coordination)
 OTNT SWP Optical Transport Networks and Technologies – Standardization Work
Plan
 ANT SWP Access Network Transport – Standardization Work Plan
May 2003
ITU-T Study Group 15
Ethernet Activities (contd)

Working Party 3
OTN Structure (Ethernet over Transport)
 G.ethna
Ethernet Layer Network Architecture
 G.eota
Ethernet over Transport Architecture
 G.esm
Ethernet over Transport – Ethernet Service Multiplexing
 G.ethsrv
Ethernet over Transport – Ethernet Service Characteristics
 G.smc
Service Management Channel – private line
 G.etnni
Ethernet over Transport Network Node Interface
 G.euni
Ethernet User to Network Interface
 G.eeq
Ethernet over transport Equipment Functional Blocks
 G.eemf
Ethernet Equipment Management Function
 G.efrw
Ethernet Framework
May 2003
Q12
Q12
Q12
Q12
Q12
Q11
Q11
Q9
Q9
Q9
OTNT Standardization Workplan
http://www.itu.int/ITU-T/studygroups/com15/otn/index.html


Contains

list of standardization bodies relevant to optical standardization,

a list of known holes/overlaps/conflicts in current work,

lists of known Standards and Recommendations

a list of documents being actively worked
Under study

May 2003
Description of ‘Ethernet over Transport’
May 2003
Customer Services
(e.g., MEF)
Network Services
(G.ethsrv)
XYZ transport
(G.esm)
TDM transport
(G.eota)
Management
channel
(G.smc)
Ethernet Layer Architecture
(G.ethna)
ITU-T Q12/15 G.exxx draft Recs.
Q12/15 G.exxx draft Recs
Consent October 2003
MEF Services
G.ethsrv
G.eota
G.ethna
G.872
G.803
May 2003
Next steps for G.exxx series

G.ethna, G.ethsrv, G.eota






G.esm, G.smc



Contributions expected
Discussion at October SG15 meeting
G.etnni, G.euni, G.eeq


May 2003
Editors will clean up and post new versions by June 10th
Submit as ITU-T SG15 White contribution by August 1st.
Discuss open issues by correspondence
Contributions to next meeting to propose final text
Consent at October SG15 meeting
Contributions expected
Discussion at October SG15 meeting
Ethernet Network Architecture - G.ethna



May 2003
Describes the functional architecture of Ethernet public networks using
the modeling methodology described in ITU-T Rec. G.805 and G.809.
(G.803, G.872 equivalent for Ethernet)
It defines high-level atomic functions. These atomic functions have to
be further specified in the equipment specifications.
The bases for this first version of the recommendation are the Ethernet
specifications in IEEE 802.1D, 802.1Q and 802.3.
Ethernet MAC (ETH) layer network
ETH Trail
ETH_AP
ETH_AP
ETH
ETH_TFP
ETH
ETH FD
ETH FDF
AP - access point
FD - flow domain
FDF - flow domain flow
FP - flow point
LF - link flow
TFP - termination flow point
May 2003
ETH FD
ETH FD
ETH FDF
ETH_FP
ETH_FP
ETH_FP
ETH_FP
ETH Link
ETH Link
ETH LF
ETH LF
ETH FDF
ETH_TFP
Ethernet PHY (ETY) layer network
ETYn_AP
ETYn Trail
ETYn_AP
ETYn
ETYn
ETYn_TCP
ETYn_TCP
ETYn NC and ETYn LC
AP - access point
NC - network connection
LC - link connection
TCP - termination connection point
‘n’ in ETYn - represents interface types
May 2003
ETY/ETH Adaptation
ETCn/ETH
ETCn
ETYn/ETCn
ETH - Ethernet MAC
ETC - Ethernet coding
ETY - Ethernet PHY
‘n’ suffix - represents interface types
May 2003
Ethernet Services - G.ethsrv




May 2003
Defines a set of Ethernet service characteristics that are supported by
the common architecture model of G.ethna
Describes Ethernet services from the network point of view (as
opposed to the customer view of the MEF)
The services should describe the characteristics of the services, without
referring to a particular network technology.
This document contains:
 1. Ethernet services
 2. Network architecture topology description required to support
these services
Definitions
May 2003

Private service
 One or more ETH links within the transport network are allocated
to transport the ETH_CI of a single customer’s service instance.
 The ETH_CI in a private service either doesn’t compete for
bandwidth

Virtual private service
 One or more ETH links within the transport network are allocated
to transport the ETH_CI of multiple service instances
 The ETH_CI in a virtual private service competes for bandwidth
with ETH_CI from another service instance of the network
Definitions
May 2003

Line service
 One ETH link within the transport network is allocated to transport
the ETH_CI of one customer service instance, between at most two
flow points.
 No additional ETH links can be added to the service

LAN service
 One (or more) ETH link(s) within the transport network is
allocated to transport the ETH_CI of one customer, between at
least two flow points.
 Additional ETH links can be added/deleted to/from this service
Ethernet Services

Ethernet Private Line (EPL)




May 2003
Only this service will be fully described in the first version
Ethernet Virtual Private Line (EVPL)
Ethernet Private LAN (EPLan)
Ethernet Virtual Private LAN (EVPLan)
Ethernet Service Attributes






May 2003
Multiplexed Access
 Yes, No
Interface type
 10BASE, 100 BASE, 1000BASE, 10GBASE-R
MAC learning
 Yes, No
Traffic Profile
 CIR, PIR, PBS
Policing
 Drop, PAUSE
L2 Control Plane Processing
 Process, Discard, Tunnel
Summary of Ethernet Services
May 2003
Ethernet
Service
Service
Configuration
Multipl exed
Ac cess
Allowed
Charac teristi
c Information
MAC
address
learning
Bandwidth
sharing
Transport
EPL
Type 1
No
Frame
Not
needed
No
CO-CS
Type 2
No
Cha racter
Not
needed
No
CO-CS
EVPL
-
Yes
Frame
Not
needed
Yes
CO-PS or
CO-CS
EPLAN
-
No
Frame
Required
No
CL-PS,
may use
CO-CS
EVPLAN
-
Yes
Frame
Required
Yes
CL-PS,
may use
CO-CS or
CO-PS
EPL type 1
CI = (un)tagged MAC frame stream
CIR
PBS1
Customer
Equipment
802.3
PBS2
CO-CS
Customer
Network
NRoS
PhIR
PhIR
1
2
802.3x Carrier
Carrier Network Carrier 802.3x Customer
PAUSE Equipment
Equipment PAUSEEquipment
WAN
LAN
P1
P2
(NAP)802.3
SDH (NP)
Carrier OTN
Equipment
May 2003
802.3
EPL type 1 - G.805 model
ETY/ETH
ETY/ETH
UNI
May 2003
xx /ETH
xx /ETH
ETY/ETH
UNI
ETY/ETH
G.ethsrv ‘living list’









May 2003
EPLAN service characteristics
EVPL service characteristics
EVPLAN service characteristics
Multiplexed Access
Rate control (using PAUSE)
Service Provider Ethernet
MAC filtering
Ethernet OAM
Ethernet Service Management
Ethernet over Transport - G.eota




May 2003
Defines the assembly of G.ethna layer networks to satisfy the
requirements defined in G.ethsrv, using particular atomic functions.
Contains mainly functional models describing these implementations.
Particular attention given to describing architectures using multiple
transport technologies.
The first version of this recommendation specifies the EoT architecture
for point to point Ethernet Private Line services.
 G.eota.1 point to point PL, G.eota.2 Private LAN,G.eota.3
VPLAN…..
Protocol and equipment specifications will be in separate
Recomendations (e.g., G.eeq)
EPL type 1 - SDH architecture
ETH_CI
Ethernet
Physical
Interface
ETH_CI
ETYn/ETH
Sn-X-l/ETH
ETYn
Sn-X-L
GFP-F or LAPS
encapsulation
GFP-F or LAPS
encapsulation
Sn-X-l/ETH
ETYn/ETH
Sn-X-L
ETYn
ETYn_CI
ETY_CI
Sn-Xv/Sn-X-L
123
XMAX
VCX
LCAS
VCX
LCAS
Sn-Xv/Sn-X-L
123
XMAX
Sn
Sn
Sn
Sn
Sn
Sn
Sn
Sn
VC-n TCP
Group A
VC-n Sub Network
connectsXPROV VC-n TCPs in TCP Group A
with XPROV VC-n TCPs in TCP Group Z PROV
(X  XMAX )
VC-n TCP
Group Z
SDH
Network
Note - The XPROV VC-n Network Connections are between VC-n TCP A[i] and VC-n TCP Z[j], with 1 i  XMAX , 1  j  XMAX ; e.g. A[1]  Z[1], A[3]  Z[2]
May 2003
Ethernet
Physical
Interface
Ethernet Services Multiplexing - G.esm



May 2003
Describes a new layer network architecture supporting
Ethernet services multiplexing over transport networks.
Requirement driven by services of G.ethsrv
Two parts:
 functional and structural architecture of a Service
Multiplexing Layer Network (was ‘XYZ layer’)
 adaptation of Ethernet services, as defined by G.ethsrv,
to this Layer Network.
G.esm ‘living list’



May 2003
Do we need a new layer architecture at all?
Review the new requirements
Candidate technologies under study:
 MPLS
 Service Provider Ethernet (MAC-in-MAC)
 GFP service multiplexing (Switched GFP-F)
Service Management Channel- G.smc



May 2003
Defines a common architecture supporting management of
Client Private Line Services (e.g., private line DSn/En,
Ethernet and/or Storage).
Defines, from the service network view, management of
the data service from edge to edge of the transport
network, including the formats and protocols that are
needed to perform the management tasks.
Defines the management parameters and the formats and
protocols that are needed to perform the management
tasks.
SMC using POH
SLA
NNI
SP_B’s
CLE
NE
CPE
SP_A’s
NE
N/W A
SLA
SP_B’s
NMS
NE
SP_B’s
Edge
NE
N/W B
CPE
NMS
ETY/ETH
Enc/ETH
ETH/Enc
ETY/ETH
ETY
Enc
Enc
ETY
Sn-Xv/Enc
Enc/Sn-Xv
Sn-Xv
Sn-Xv
SMC [POH] inserted
here (can be either
GFP or LAPS)
Sn-Xv/Sn-X
Sn-X
Sn-Xv/Sn-X
Sn-X
SnSMC/Sn
SnSMC
Sn-X
Sn-X
.
2.
X
2
May 2003
X
1
1
Access SNC
..
SNC A
SNC B
Requests to IEEE 802.1

Invite comments and input to progress the Ethernet over Transport
work

Request comparison of SG15 work to IEEE 802.1 work

Invite comments on Standardization work plan

Request specific review of G.ethsrv Ethernet service ‘L2 control frame
processing’ attribute
May 2003