ip vpn service
DESCRIPTION
IP VPN service. Dimitrios Kalogeras. 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. - PowerPoint PPT PresentationTRANSCRIPT
IP VPN service modelParis-November-2000
IP VPN service
Dimitrios Kalogeras
IP VPN service modelParis-November-2000
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 modelParis-November-2000
QoS Architecture• Formula for VPN QoS
VPN QoS = Access QoS + Backbone QoS
– Access QoS = Traffic Conditioning
– Backbone QoS ~ Traffic Engineering
IP VPN service modelParis-November-2000
Backbone QoS
NRN 1
Access Network
NRN 3EU
users
Univ.
ISP remote PoPsRegional ISPsLECs/CLECs
NRN 2Backbone QoS
IP VPN service modelParis-November-2000
Access QoSNRN 2
Access Network
NRN 3
ISP remote PoPsRegional ISPsLECs/CLECs
Access QoS
IP VPN service modelParis-November-2000
Over provisioning
• Need for QoS in the Core ?
• Need for Qos in the Access
IP VPN service modelParis-November-2000
Physical Media• POS, WDM(POS) Core• GigE, DPT access• QoS on the MAC Layer ?• Efficient Mapping on the IP layer VLANs
IP VPN service modelParis-November-2000
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 modelParis-November-2000
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 modelParis-November-2000
Application for QoS• End to End
– RSVP to diffserv (?)
• VIPLL (Cl. Filsfils)• Transantlantic BW management
IP VPN service modelParis-November-2000
Targets• Resilience
• Min Guaranteed Ocean BW per NRN
• Optimization of links’ utilization
• Simpler Design than ATM PVCs ?
IP VPN service modelParis-November-2000
ImplementationVIPLL reference ModelVIPLL reference Model
Europe
Cust1 Cust2
MinimumN1 Mb/s
Unlimited
Unlimited
Backbone
US Internet
TEN-us
R-pe1
R-c1
R-pe2
R-c2
TEN-EUISP AS
US
Assumption:Assumption:Managed Managed Router in USRouter in US
IP VPN service modelParis-November-2000
Building Blocks • CAR – Line Rate, Performance
penalty• BGP Communities • # of Queue (Precedence)• Semantics on queues (DSCP)
IP VPN service modelParis-November-2000
MPLS – VPN COS
VPN SP
VPN_A site 2
ICR 256k
ICR 256k
ICR 512k
ECR 128k
ECR 128k
ECR 512k
Hose Model (point-to-multipoint commodity) Draft-duffield-vpn-qos-framework.txt, AT&T
IP VPN service modelParis-November-2000
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 modelParis-November-2000