SG13 Caracas seminar

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Overview of WP3/13
WP3/13 Multi-protocol Networks and
Mechanisms May 14, 2001 WP3 Chaiman Yoichi
Maeda (NTT, Japan) Email maeda.yoichi_at_lab.nt
t.co.jp
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Questions in WP3/13
Question2/13 ATM layer and its Adaptation (AAL)
Rapporteur Mr. K. Ahmad (Nortel Networks)
Question 3/13 OAM and Network Management in
IP-Based and Other Networks Rapporteur Mr. H.
Ohta (NTT)
Question 11/13 Mechanisms to Allow IP-Based
Services Using MPLS to Operate in Public Networks
Rapporteurs Mr. M. Carugi (FT) Mr. S.
Shimizu (Hitachi)
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Q.2 Issues on ATM

• ATM layer has been mostly completed in past study
  periods and is in a stable condition in
  Recommendations I.150 and I.361
• I.150 B-ISDN ATM functional characteristics
• I.361 B-ISDN ATM layer specification

Key issues

• ATM layer capabilities to support multicast
  services and other point-to-multipoint,
  multipoint-to-point, multipoint-to-multipoint
  services.
• Potential additional pre-assigned ATM cell header
  values

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Q.2 Issues on AAL

• Much of the work on ATM Adaptation Layer (AAL)
  specifications has been completed in past study
  periods. Specifications have been prepared for
  AAL Types 1, 2, 3/4 and 5 together with a number
  of service specific convergence sublayers
  (SSCSs).
• I.363.x B-ISDN AAL specification AAL Types
• I.366.x Segmentation and Reassembly SSCS for
  AAL types

Key issues

• New or enhancements to existing Recs. for AAL
  types
• AAL type 1 for interworking between AAL type1 and
  AAL type2
• ATM layer transfer capabilities and QoS suitable
  for particular AAL protocols, etc.

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Q.3 Issues on OAM for IP-based NW

• OAM and protection switching issues of IP-based
  networks are to be considered to protect small
  numbers of premium services which rely on high
  reliability when multiplexed with a large number
  of unprotected services.

Key issues

• New draft Recommendations are expected to be
  consented in Caracas meeting
• Y.17oam.1 OAM functionality for MPLS networks
• Y.17ps Protection switching for MPLS networks

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Q.3 Issues on OAM enhancements

• The OAM aspects for ATM layer have been enhanced
  in the study period 1997-2000
• I.610 B-ISDN OAM principles and functions
• I.630 ATM protection switching

Key issues

• Enhancement of I.610 OAM studies of AALs and
  other evolving link layer management, and OAM
  functions for Point-to-Multipoint connections
• Enhancement of I.630 Protection aspects on 1n
  and mn protection configuration, semi-dedicated
  protection, ATM ring protection, performance of
  protection switching and protection against
  signal degrade

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Q.11 Multi-protocol mechanisms

• Recommendation Y.1310 selected MPLS as the
  preferred architecture for IP transport over ATM
• Y.1310 Transport of IP over ATM in Public
  Networks

Key issues

• mechanisms to support QoS-aware IP services in
  MPLS based networks.
• mechanisms for transport of IP diffserv (and
  intserv) over MPLS based networks
• mechanisms to support each identified additional
  IP-based service over MPLS networks
• e.g. Voice over MPLS Liaison from MPLS Forum
• requirements and mechanisms for IP-VPN service

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Q.11 Definition of IP-VPN
A network infrastructure delivering private
network services over a public infrastructure.
VPN
Public network (Internet, FR, ATM, etc.)
VPN has become a hot issue, one of the new
killer application of the IP based network, a
24B business.
(Source CIMI Corp.)
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Q.11 Issues on IP VPN

• A number of IP VPN proposals in the market
• would like to define common requirements
• Interoperability towards multi-vendor
  environments
• would like to define applicability scenarios for
  the various solutions
• integration of Service Provider added-value
  requirements

• Two draft versions of Recommendations on IP VPNs
  have been produced up to now
• Y.1311 Network based IP VPN Service - Generic
  framework and service requirements
• Y.1311.1 Network based IP VPN over MPLS
  Architecture (expect to be consented in
  Caracas)

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Q.11 Further study issues on VPN

• Ensure scalability over the next several years
• Flexibility to accomodate future requirements
• non-IP services over the same VPN
• e.g. ATM/FR/SDH/Ethernet over MPLS
• (L2 VPN)
• Layer 1 VPNs (optical VPN)
• Interoperability scope
• Segmentation of the service offer
• (Carrier/Service Provider VPNs vs Enterprise
  VPNs)
• Necessity of the synergy is identified to ensure
  mutual exchange, cooperation and progress between
  ITU-T (Y.1311.1) and IETF (PPVPN)

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Conclusion
WP3/13 will study multi-protocol networks and
mechanisms to deliver high-quality and reliable
networking.
Muchas gracias !