Transcript Document

Designing the Multi Domain Service
Architecture for Network Connectivity
Services in the GÉANT3 project
Brian Bach Mortensen, NORDUnet
Terena Networking Conference
Vilnius
2010
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Outline
GÉANT Service area
Terminology and definitions
Service catalogue and portfolio
Service Architecture
Service Level Specification
Operational Level Agreement
Service descriptions and SLS
Static connectivity service
Dynamic connectivity service
Q&A
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GÉANT service area
Services provided jointly by independent organizations
Technological differences
Organizational differences
Targets and challenges
Joint service should hide internal differences
Support structure (service desk, monitoring) possible provided by
organizations
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Service Access Hierachy
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Domain terminology
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Path agnostic services
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Service Demarcation Point (SDP)
Define a point where the service
is delivered:
An ”Equipment identifier”
Unique URN
A ”Port” identifier
A ”Service ID” identifier
<E/P/I> tuple
The syntax of the SDP may vary
from service to service
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Service Portfolio and Catalogue
Define a common service catalogue of connectivity services that can be
offered to the NREN users
Currently two main connectivity services
are in progress (design phase):
Static connectivity service
Dynamic connectivity service
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Customers and service dependencies
Customer A
Requirements
Requirements
Customer B
Customer C
Requirements
Requirements
Requirements
Requirements
Service desc. IP
Service desc. wavelength
Service desc. BoD
IP SLS
Wavelength SLS
BoD SLS
Joined provider
infrastructure
I-SHARe
(tool)
perfSONAR
(tool)
Network
Interfaces
(resource)
Network
Protocols
(resource)
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Infrastructure and supporting
services
iShare
(tool)
OLA
OLA
Federated Provider
Internal groups
perfSonar
(tool)
Supporting
Service
Supporting
Service
Federated
Support
Federated
Team
Support
Team
Network
Interfaces
(resource)
Network
Protocols
(resource)
Supporting
Service
Supporting
Service
Support
Team
Support
Team
Joined
provider
infrastructure
OLA
OLA
Individual NRENs
or DANTE
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Service Descriptions (1)
Two service descriptions are delivered:
A General Service Description (GSD)
– Non technical description of the service
– Less than 300 words
– Can be used by NRENs to advertise the service towards end
users e.g:
– “The GN3 Multi-domain Wavelength-based Static Connectivity
–
–
Service (in the following referred to as “the service”) is an endto-end, point-to-point connectivity service for data transport.
Currently, the data transport capacity dedicated to a connection
can range from 1 Gbit/s up to 40 Gbit/s.”
A few more paragraphs to further explain what the service
offers
Simplicity is key!
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Service Descriptions (2)
A Service Functionality Description (SFD)
– Technically oriented description of the service
– Targetted at the NOC managers and operational staff at the
instituitions that needs the service
– Covers management of the service e.g:
– Fault management, service delivery management,
accounting management, performance management,
security management, etc. etc.
– Some dataplane specifics e.g. possible interfaces/protocols
at service demarcation points between the NREN and user
institution
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Service Level Specification
Specifies all the measureable service levels that the GN3 service
consortium endeavours to deliver :
Examples:
Availability of the service (with specifications of measurement
criterias when the service is compliant)
– Packet loss, delay, etc.
MTU sizes, maximum burst sizes
Service Delivery times
– Service initiation
– Service operation change
– Service removal
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Where are the networks?
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SLA/OLA dependencies
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LHC OPN based on multi-domain E2E
links
OLA
SLS
Figure is modification of work from R. Sabatino
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Static connectivity service
A static connectivity service offering SDH, Ethernet interfaces
1-40Gb/s
Deterministic delay behaviour
(Some) open issues
Lead times
– NRENs have very different lead times (technology dependent)
– Lowest lead time can not be used
– Highest may slow down even simple deliveries
– A combination depending on request and possible paths may
be the optimum solution
Path diversity?
– Both inside individual networks and the whole multidomain
path?
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Dynamic connectivity service (1)
A dynamic, end-to-end Ethernet connectivity service
Point-to-Point (between two SDPs within the joint domain)
Four tranport modes under consideration
– Transport of untagged Ethernet frames
– Transport of a specific VLAN (with or without VLAN rewrite)
– Transport of all tagged Ethernet frames
– Delivering untagged frames to specific VLAN
Bandwidth: 1Mbps-10Gbps (1Mbps steps), MTU: Standard, Jumbo
Path control (i.e, use/avoid domains/nodes) for diverse routing
Relatively short-living circuits with small lead time
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Dynamic connectivity service (2)
Participation requirements: Participating domains must implement the
required supporting services.
Supporting services (draft list)
– Inter-Domain Topology Distribution
– Inter-Domain Path Finding
– Intra-Domain Transport
– Monitoring
– Authorization and Authentication
– Service Desk
– Accounting & Billing
GN tools like AutoBAHN, cNIS, perfSONAR, eduGAIN can be used for
this purpose;
but a domain can use its own tools as well
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The Teams
Static service design lead by Dr. Andreas
Hanemann/Rebecca Corn
Carlos Friacas, Mark Yampolskiy, Andrea Kropacova, Gloria
Vuagnin, Maciej Łabędzki, Kurosh Bozorgebrahimi, Tangui
Coulouarn, Wolfgang Fritz
Dynamic service design lead by Andreas Polyrakis
Jerry Sobieski, Tomasz Szewczyk, Milosz Przywecki.,
Leonidas Poulopoulos, Bartosz Belter, Gustavo Neves, Jacek
Łukasik, Damian Parniewicz, Kostas Stamos, Joan Garcia
Espin, Jordi Jofre
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Q&A
Thank you
Additional questions may be send to [email protected]
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