HPSR 2002 Kobe, Japan. Towards Next Generation Internet. Bijan Jabbari, PhD Professor, George Mason University

Transcription

1 HPSR 2002 Kobe, Japan Towards Next Generation Internet Bijan Jabbari, PhD Professor, George Mason University May 28, 2002

2 Overview! Scalability and Interoperability in Internet! Impediments in Deployment of Leading-Edge Technology 2

3 Observations: Prevailing Growth Rate Laws! Moore s Law! Processor technology (speed vs. chip size)! Metcalfe s Law! Utility of meshed networks O (N 2 )! Extended to networks with community of interest and to applications O ( ~m*2 n )! Internet traffic rule! Growth rate from 2x to 3x per annum 3

4 Challenges in Scaling Internet Mobility Applications Multimedia Access Core Control Management Resources Differentiated Services/QOS 4

5 Challenges: Internet Scalability! Internet scalability challenges industry and academia with complex multidimensional problems often not well understood! Hardware and software scalability! Protocol scalability! Scalability of large scale network architectures! Other constraints (physical dimensions, power consumption, heat dissipation)! Testing of complex Internet protocols Core Network Requirements " Integrated Traffic Engineering 5

6 UUNET s Network 6

7 Scaling for Services! How to distribute flows across network resources in order to avoid packet loss, minimize queuing delay, and maximize throughput (efficient resource allocation / utilization)?! How to simplify routing function?! Handling real-time online constraint resolution! Handling fast fault recovery and rerouting Traffic Engineering Problem " MPLS 7

8 Multiprotocol Label Switching - MPLS! Enhances IP routing using dynamic distribution of topology and constraintbased data! Separates routing from forwarding! Provides Traffic Engineering (TE)! Maps traffic trunks to VC-like paths! A short fixed Label attached to packets by the MPLS Ingress node! Labels are established through hop-by-hop or source routing! Packets belonging to the same Forwarding Equivalent Class (FEC) are assigned to the same label value! Allows proactive control of congestion or under-utilized links 8

9 The Next Generation Internet Technology IP MPLS MPλS GMPLS! MPLS Multi Protocol Label Switching! Generalized MPLS! Further integration and support of media 9

10 MPLS Deployment Issues! UUNET was the first to deploy the MPLS technology within part of its network based on Juniper s M40 router as Label Switching Routers (LSRs)! UUNET extend collaboration with GMU which started in early 1998! UUNET s Engineering management established a research laboratory at GMU! To foster cooperation across IP-based industry in the area of MPLS and other IP technologies as they evolve! UUNET provided a research grant and helped establish the lab 10

11 Challenges in Interoperability Testing LSR 1 LSR 2 LSR 3! Complexity A simple test configuration! Number of tests required for m implementations of n features! Testing is not commutative! Technical issues in interoperability testing! Reference points for interoperability testing! What features should be supported by vendors?! Handling contradictions, ambiguity, errors in the specification! Other challenges (confidentiality, NDA, etc.) 11

12 Advanced Internet Laboratory (AIL) at George Mason University! Established in 1999, a laboratory dedicated to basic and applied research related to IPbased technologies! An Industry-University partnership contributing to intellectual processes of the next generation IP networking through research relevant to industry

13 AIL Activities! Industry acceptance through initial mission! multi-vendor MPLS interoperability testing (a two year program)! Research problems related to Traffic Engineering! Restoration techniques! Wireless Packet-based label switching

14 Topology for First Round of Testing Early 2000 RSVP-TE / OSPF Participating Vendors OC12 OC12 OC12 OC12 POS POS POS POS OC12 OC12 OC12 OC12 POS OC 12 POS OC 12 POS OC 3 POS TSR GSR M 20 OC OC OC OC POS POS POS POS OC 12 POS OC 3 POS OC 3 POS POS POS POS OC OC OC OC POS POS POS POS OC3 OC3 OC3 OC3 POS POS POS POS OC12 OC12 OC12 OC12 POS POS POS POS OC 12 POS OC3 POS OC12 POS GSR M 20 TSR OC12 OC12 OC12 OC12 POS POS POS POS OC 12 POS OC 12 POS 14

15 Contributing to IETF Standards For RFC Approval Informational RFC WG Review and Revisions IESG Review Standards Track RFC WG Internet Drafts Networking Product Supplier Main Capability Set Experimental RFC Test Plans ISPs and Major Users Testing 15

16 Accomplishments! MPLS Signaling protocol Interoperability! RSVP-TE Interoperability! LDP Interoperability! TE Extensions to OSPF Interoperability! Signaling Hierarchical LSPs (With RSVP in the core and LDP at the edge of the VPN core)! Multi-vendor support across a multiplicity of interfaces for MPLS based applications! MPLS Based VPNs! BGP MPLS VPN (2547bis) Interoperability! Draft martini and Layer 2-based VPNs 16

17 Arigato 17