Liaison statement
LS171 - Status of OMCI for MPLS and MPLS pseudowire configuration

State Posted
Posted Date 2010-05-05
From Group ITU-T-SG-15
From Contact Greg Jones
To Groups BROADBAND-FORUM, mpls, pwe3
To Contacts
Response Contact
Technical Contact
Purpose For information
Attachments LS171 - Status of OMCI for MPLS and MPLS pseudowire configuration - pdf body
LS171 - Status of OMCI for MPLS and MPLS pseudowire configuration - pdf attach1
LS171 - Status of OMCI for MPLS and MPLS pseudowire configuration - pdf attach2
Dear members of the IETF MPLS and PWE3 working group, and BBF, 

There is a trend that operators are deploying MPLS and PWE3 in access
networks, especially in an access network of G-PON (Gigabit-capable Passive
Optical Networks). 
ITU-T Q2/15 has developed a series of recommendations on Passive Optical
Networks (PON). G-PON systems are characterized, in general, by an Optical
Line Termination (OLT) system, and an Optical Network Unit (ONU), with a
passive Optical Distribution Network (ODN) interconnecting them. There is, in
general, a one-to-many relationship between the OLT and the ONUs respectively.

The ONU management and control interface (OMCI) is a management channel
between the OLT and the ONUs that supports Ethernet, equipment, subscriber
interface, and subscriber feature management. OMCI specifies the managed
entities of a protocol-independent management information base (MIB) module
that models the resources and services in an ONU. Through standardized OMCI
signalling, OLT builds up its management bonds with ONUs. OMCI is standardized
in G.984.4 and G.988.
G.984.4 Amendment 2, extends the functions that can be configured using OMCI
to include MPLS and MPLS pseudowire termination points at an ONU. This allows
seamless integration of MPLS and MPLS pseudowire services with a PON.
As OMCI is a management protocol, we believe this is not in conflict with the
IETF's development of the data plane and control plane for MPLS and MPLS
pseudowires. We do not intend any changes to the MPLS and pseudowire
architectures, and we intend our work to be in line with the IETF RFCs that
define MPLS and MPLS pseudowires. We see a benefit for the application of MPLS
and MPLS pseudowires in access networks by facilitating label provisioning via
a management system, 
The subject of generic OMCI for MPLS configuration is still open for further
study in Q2/15 and will be continued in G.988 era for the next generation of
PON.  We hope to cooperate with you in this standards development work.  
Q2/15 appreciates further communication from the MPLS and PWE3 working groups
in IETF if there are any comments or requests.  G.984.4 and G.984.4 Amendment
2 are attached for your information. Our next meeting is planned for May 31,