C&C Research Laboratories Eurescom AIMS -1- 10.03..98 NEC Europe Ltd. Multimedia communications with IPSOFACTO A.Acharya,F.Griffoul,M.Ott,H.J.Stüttgen(NEC),H.Sanne ck(GMD) [email protected]- Tel. +49 6221 905 110 NEC Europe Ltd. C&C Research Laboratories Heidelberg - Germany
17
Embed
C&C Research Laboratories Eurescom AIMS -0- 10.03..98 NEC Europe Ltd. Multimedia communications with IPSOFACTO A.Acharya,F.Griffoul,M.Ott,H.J.Stüttgen(NEC),H.Sanneck(GMD)
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
C&C Research Laboratories Eurescom AIMS -1- 10.03..98
NEC Europe Ltd.
Multimedia communications with IPSOFACTO
A.Acharya,F.Griffoul,M.Ott,H.J.Stüttgen(NEC),H.Sanneck(GMD)[email protected] - Tel. +49 6221 905 110NEC Europe Ltd. C&C Research Laboratories
Heidelberg - Germany
C&C Research Laboratories Eurescom AIMS -2- 10.03..98
NEC Europe Ltd.
Content
• NEC‘s IPSOFACTO architecture
• Multimedia support with IPSOFACTO– RSVP over IPSOFACTO
• ACTS IthACI project
C&C Research Laboratories Eurescom AIMS -3- 10.03..98
NEC Europe Ltd.
Why IP switching ?IP
+ Internet connectivity• defacto standard.• multiple applications.
• are sent on a default control VC– they are never switched, always routed by the controller.
• processed for per-flow forwarding state– add/modify/delete corresponding switched paths.
– Allows for per-flow QoS extensions.
Soft-state control at the IP level
C&C Research Laboratories Eurescom AIMS -9- 10.03..98
NEC Europe Ltd.
IPSOFACTO: Advantages and Issues
+ can run in parallel with standard ATM
+ zero overhead switched path set-up
+ use of protocol semantics: IP level state
- potential high VC consumption
- loop avoidance problem
aggregation, possibly with explicit routing and VC-merge
C&C Research Laboratories Eurescom AIMS -10- 10.03..98
NEC Europe Ltd.
RSVP over IPSOFACTO
• RSVP periodical messages:– sender-initiated PATH– RESV on reverse path
• IPSOFACTO:– PATH,RESV sent on default control VC– RESV used to move switched VC to
appropriate traffic class.
C&C Research Laboratories Eurescom AIMS -11- 10.03..98
NEC Europe Ltd.
RSVP: Switch Controller Architecture
ATM driver
mrouted rsvpdCACd
IPSOd
IP
IPSOFACTO
IGMPGSMP
To the switch
Routed VCs Port control VCs
C&C Research Laboratories Eurescom AIMS -12- 10.03..98
NEC Europe Ltd.
RSVP over IPSOFACTO: Review
• good news– easy IP multicast mapping
– RESV merge and QoS renegotiations possible
• bad news– no QoS support from GSMPv1
– only a subset of reservation styles• no mpt-2-pt VC in current ATM hardware
– limited receiver heterogeneity• VC space exhaustion
C&C Research Laboratories Eurescom AIMS -13- 10.03..98
NEC Europe Ltd.
IP-Switching Proposal (IthACI)• a third and last ACTS call was due 9/26/97
– one focus on Internet/ATM Integration• the following partners submitted a research
proposal for IthACI: Internet and the ATM: Experiments Enhancements for Convergence and Integration– TC vendors: Alcatel-Bell(Belgium), Cisco(UK),
NEC E (Germany)– System Integrator: Algo Systems (Greece)– Research: GMD FOKUS(Germany), IMEC (Belgium),
University of Surrey(UK), ICS FORTH (Greece)Result:
– IthACI was rated #1 of all IP-Switching proposals
C&C Research Laboratories Eurescom AIMS -14- 10.03..98
NEC Europe Ltd.
IthACI Objectives• gain field trial experience in using different IP-
switching technologies as access nodes, interconnected via ATM PVCs
• develop functional enhancements not yet adressed by various IP-Switching technologies:
– support for multimedia communication, namely quality of service and multicast functions
– integration of WAN resource management/planning
• impact developing MPLS standard in the IETF
C&C Research Laboratories Eurescom AIMS -15- 10.03..98
NEC Europe Ltd.
IthACI Islands
W orks tation IB MCom patible
IB MCom patible
Hub
W orks tation IB MCom patible
IB MCom patible
Hub
W orks tation IB MCom patible
IB MCom patible
Hub
Alc.Bell Islnd NEC Island
Cisco Island
C&C Research Laboratories Eurescom AIMS -16- 10.03..98
NEC Europe Ltd.
The „Green“ IthACI Island
LANIPSOSW
ATM WAN
PVCsIPSOSWIPSO
SW
IPSOSW
IPSOSW
IPSOSW
IPSOSW
NEC&GMD BerlinNEC
Heidelberg
IMEC (Gent)
C&C Research Laboratories Eurescom AIMS -17- 10.03..98
NEC Europe Ltd.
SummaryIPSOFACTO• is NEC‘s architecture to combine ATM and IP• it is flow based and open to per flow QoS extensions• IPSOFACTO avoids using an explicit flow-setup or tag
distribution protocol
IthACI• a new ACTS project targeted at field trials with different
IP-Switching variants for a PAN European Internet over an ATM backbone (IPSO, Tag-Sw,...)
• project results are intended to impact MPLS WG• IthACI consortium is interested in participation of other