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IP VPN service

IP VPN service

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IP VPN service

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  1. IP VPN service Dimitrios Kalogeras IP VPN service model

  2. Ideal Case of QoS VPN • Guarn’td .Min or Max Bandwidth • Highly Scalable, Very Granular • Edge to Edge control • Choice of parameters measured • Meaningful SLA’s • Cost effective VPN’s • Ease of Central management & Config • Accurate & meaningful billing info. • NRN or User controlled service IP VPN service model

  3. QoS Architecture • Formula for VPN QoS VPN QoS = Access QoS + Backbone QoS • Access QoS = Traffic Conditioning • Backbone QoS ~ Traffic Engineering IP VPN service model

  4. Backbone QoS NRN 2 Backbone QoS NRN 1 Univ. ISP remote PoPs Regional ISPs LECs/CLECs Access Network users NRN 3 EU IP VPN service model

  5. Access QoS Access QoS NRN 2 ISP remote PoPs Regional ISPs LECs/CLECs Access Network NRN 3 IP VPN service model

  6. Over provisioning • Need for QoS in the Core ? • Need for Qos in the Access IP VPN service model

  7. Physical Media • POS, WDM(POS)  Core • GigE, DPT  access • QoS on the MAC Layer ? • Efficient Mapping on the IP layer VLANs IP VPN service model

  8. QoS models • Pipe model • Between routers • Similar to ATM FR • Existing US Service • Necessary traffic matrix • Traffic Update model • Unidirectional • GB LSP IP VPN service model

  9. QoS models • Hose models • Share the backbone • Traffic limit on Input (ICR) and Output (OCR) • E-LSP or L-LSP • Draft-duffield-vpn-qos-framework.txt • http://www.acm.org/sigcomm/sigcomm99/papers/session3-2.pdf • draft-rosen-vpns-ospf-bgp-mpls-00.txt • http://www.globecom.net/ietf/draft/draft-duffield-vpn-qos-framework-00.html • draft-iyer-policy-ipvpn-info-model-00.txt IP VPN service model

  10. Application for QoS • End to End • RSVP to diffserv (?) • VIPLL (Cl. Filsfils) • Transantlantic BW management IP VPN service model

  11. Targets • Resilience • Min Guaranteed Ocean BW per NRN • Optimization of links’ utilization • Simpler Design than ATM PVCs ? IP VPN service model

  12. Implementation VIPLL reference Model Assumption: Managed Router in US US Europe ISP AS TEN-us TEN-EU US Internet Backbone R-pe1 R-pe2 Unlimited Minimum N1 Mb/s Unlimited R-c1 R-c2 Cust1 Cust2 IP VPN service model

  13. Building Blocks • CAR – Line Rate, Performance penalty • BGP Communities • # of Queue (Precedence) • Semantics on queues (DSCP) IP VPN service model

  14. ECR 512k ICR 512k ECR 128k ECR 128k ICR 256k ICR 256k MPLS – VPN COS VPN SP VPN_A site 2 Hose Model (point-to-multipoint commodity)Draft-duffield-vpn-qos-framework.txt, AT&T IP VPN service model

  15. Building Blocks • A new AS and address allocated to all NRNs • MPLS VPN with OSPF on the Customer Side (with Area 0) (?) • VPN over different AS propagated in NRNs • Carrier in Carrier with VPN IP VPN service model

  16. IP VPN service model