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Applications of MPLS in GÉANT

Applications of MPLS in GÉANT. MPLS WORLD CONGRESS 2002 Paris 7th February 2002. Agnes Pouele, Network Engineer DANTE. 1. Agenda. Overview of GÉANT GÉANT Services GÉANT and Traffic Engineering GÉANT TE and OSPF Metric Replacement of TEN-155 MBS Service The TEN-155 MBS Service

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Applications of MPLS in GÉANT

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  1. Applications of MPLS in GÉANT MPLS WORLD CONGRESS 2002 Paris 7th February 2002 Agnes Pouele, Network Engineer DANTE 1

  2. Agenda • Overview of GÉANT • GÉANT Services • GÉANT and Traffic Engineering • GÉANT TE and OSPF Metric • Replacement of TEN-155 MBS Service • The TEN-155 MBS Service • GÉANT Premium IP Service • Alternative solutions with MPLS • Enforcement of the Premium IP Service with MPLS TE • The Virtual Lab Service • Conclusion 2

  3. DANTE DANTE plans, builds and manages advanced network services for the European R&E community. GÉANT GÉANT is a 10 Gbps Pan-European Network, it supports the development activities of the European National Research & Education Networks (NRENs) GÉANT has been launched in December 2001 and is the successor of TEN-155*. Overview of GÉANT 3

  4. GÉANT Standard IP Service IP traffic from NREN to NREN (About 30 countries) IP traffic from NREN to Research Peerings (Abilene, Canarie, ESnet, NII ..) Multicast Service Multicast is enabled for all the customers and Research Peerings Replacement of the Managed Bandwidth Service Premium IP Service (End to End Service for upper bounded Delay, upper bounded IPDV, negligible loss). Layers 2 VPN Upcoming of New Services Security and Dos attack detection IPv6 (Pan-European IPv6 test pilot network) GÉANT Services 4

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  6. GÉANT Services • GÉANT Standard IP Service • IP traffic from NREN to NREN (About 30 countries) • IP traffic from NREN to Research Peerings (Abilene, Canarie, ESnet, NII ..) • MulticastService • Multicast is enabled for all the customers and Research Peerings • Replacement of the Managed Bandwidth Service • Premium IP Service (End to End Service for upper bounded Delay, upper bounded IPDV, negligible loss). • Layers 2 VPN • Upcoming • Security and Dos attack detection • IPv6 (Pan-European IPv6 test pilot network) 6

  7. GÉANT is currently an over-provisioned backbone. It doesn’t need MPLS-TE for splitting the traffic load among the trunks at its beginning. We are using OSPF metrics to influence the path taken by the IP traffic from each entrance to each exit point. The use of OSPF metrics is quite simple but has some limitations in terms of scalability and TE GÉANT and Traffic Engineering 7

  8. Eenet Litnet Janet Nordunet NY4-1 Latnet IUCC Posnan STM64 circuits 9 se pl uk STM16 circuits 40 Heanet 630 STM4 circuits 40 ie Surfnet STM1 circuits 35 7 nl 640 Belnet 5 40 10 DFN be Restena 640 NY4-2 Cesnet 40 lu Infonet Renater 640 10 de 10 cz fr 159 40 40 Rediris 20 Sanet es 7 sk FCCN 7 35 20 Hungarnet 7 hu RoEduNet it ch 40 INFN 170 10 Arnes at si Switch&Cern 160 160 gr Carnet Aconet Grnet Cynet Unicom-b 8 GÉANT TE: OSPF Metric

  9. TEN-155 was an IP network built on ATM STM1 trunks upgraded in year 2000 at 622 Mbps. The TEN-155 Managed Bandwidth service provided International test-bed with QoS. The platforms were built with ATM VPs or PVCs with different classes of service (UBR, CBR). The test-beds were extended in each NREN backbone with the extension of the virtual connections Replacement of TEN-155 MBS Service 9

  10. MBS service from TEN-155 TEN-155 backbone NL NREN Janet UK AS786 AS8933 Regional Network DE A DFN AS680 FR MBS service ATM connection across NRENs and TEN-155 Regional Network B 10

  11. The Premium IP service is an end-to-end service (University to University) crossing multiple administrative domains The model is based on a combination of edge-to-edge services offered by each domain. This service which is currently being piloted in GÉANT has the aim to provide international Virtual leased line based on Diffserv. It is defined on the basis of the Diffserv Expedited Forwarding Per Hop behavior which is required to offer Bandwidth, low loss, upper bounded delay and jitter GÉANTPremium IP Service 11

  12.  streams < 10 % of the BW access Premium IP:Virtual Leased Line service SE NREN Janet UK AS786 AS20965 Rate limitation is applied on the NREN access Regional Network DE GÉANT backbone A DFN AS680 FR • Premium IP packets are tagged with DSCP code =46 • Rate Limitation is applied per aggregate on the NREN’s access, based on the total demanded bandwidth towards the destination. • Admission Control is made manually based on the Sum of bandwidth already booked on the destination access. Regional Network B 12

  13. MPLS TE can enforce this service by providing the best TE path across the network. Lowest Delay independently of OSPF metric Low loss with the use of Backup LSPs The LSPs can carry the aggregate Premium IP traffic and can be provisioned on demand We don’t necessarily need to establish a full mesh. It depends on the number of participants The bandwidth of the LSPs reflects the total amount of booking of Premium IP from one NREN to another one. Alternative solution with MPLS GÉANT Premium IP service and MPLS TE 13

  14.  streams < 10 % of the BW access Alternative solution with MPLS GÉANT Premium IP and MPLS TE SE NREN Janet UK AS786 LSP UK-SE Rate limitation is applied on the NREN access LSP DE-UK Regional Network LSP FR-UK DE AS20965 A DFN AS680 FR GÉANT backbone Regional Network B 14

  15. Forwarding of Premium IP “only” into the LSPs. “CoS and destination” Based Forwarding Admission Control On the core Automatically done by RSVP-TE. This Admission Control will permit to control the booking of Premium IP per link in the core and avoid overload in the case of re-routing. On the Access Still Manual but can be automated by monitoring the  of tunnel BW landing on each exit point Alternative solution with MPLS GÉANT Premium IP and MPLS TE 15

  16. Definition The customers of MBS were using this service for the guaranteed BW and for the ability to have a Layer 3 network independent of the production traffic on TEN-155. The models discussed previously can’t provide isolation. Thus a second service is under study for the provisioning of VPNs. This service is called the Virtual Lab Service. Alternative Solution with MPLS The Virtual Lab Service 16

  17. The Virtual Lab Service allows the construction of international test-beds. The service itself will be limited, in the beginning, to the core backbone. This service is based on point-to-point connections of layer 2 encapsulated into MPLS. Proprietary Encapsulation Draft-Kompella-ppvpn-l2vpn-01.txt The Virtual Lab ServiceOverview 17

  18. On the core side the virtual connection will be carried out by MPLS TE On the access side two types of access are defined Shared access IP traffic and Virtual lab traffic are on the same physical link separated at layer 2 by virtual channel POS STM16 FR-DLCI ATM PVCs Dedicated access Any layer 2 The Virtual Lab ServiceOverview 18

  19. The Virtual Lab ServiceExample of Virtual platform In the core GÉANT backbone Encapsulation Layer2 <-> MPLS MPLS traffic IPV4 traffic LSPs NREN A NREN C Dedicated access STMxx to STM16 POS DLCI Virtual Lab access DLCI Production traffic access GÉANT’s router Shared media access (up to STM16 POS) NREN B NREN’s access router Dedicated access (up to STM16 POS) NREN’s test router 19

  20. Different options for the Virtual lab With QoS Queuing of MPLS packets with Experimental CoS bits marked Use of WRR in the core (For now not needed) Use of Rate limitation on the access With Backup LSPs To protect sensitive application (low loss) Monitoring via SNMP per virtual lab. Monitoring of each trunk (LSP) per VL BW usage .. The Virtual Lab ServiceDifferent Options 20

  21. The Virtual Lab Service: Inter-domain extension GÉANT backbone PE1 MPLS VPN layer 2 GRE Tunnels&LSP or UTI MPLS VPN layer 2 PE2 PE4 PE/CE NREN A NREN C Interworking area PE Interworking area Regional Network Regional Network PE3 • Delivery to the regional • network of a DLCIs ATM access NREN B LSPs ATM Backbone ATM PVCs DLCI Production traffic access Regional Network • Delivery to the regional • network of ATM PVCs GÉANT’s PE DLCI Virtual Lab access NREN’s PE Shared media access (up to STM16 POS) 21

  22. Definition of the service Still under discussion Limitations Interoperability Number of Virtual platform which can be supported ? Extension to NREN’s core backbone Obvious for the NREN’s which are still in ATM To be investigated for pure IP backbone The Virtual Lab Servicenext step 22

  23. Conclusion • GÉANT and MPLS-TE for IP production traffic • Altought GÉANT looks over provisioned in the medium term we expect an exponential growth in the usage of BW. • Replacement of the MBS service • MPLS Layer-2 VPNs & Traffic Engineering associated with Diffserv are keys to the deployment of the advanced services needed by the Research Community. 23

  24. Thanks • Questions ? 24

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