Download Document

Terena Networking Conference 2000, Lisboa 22-25 May
QoS in IP over ATM Networks
The BTI field trials
Terena Networking Conference 2000
Lisboa, 22-25 May
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
ACTS BTI - Broadband Trial Integration
(May 98 – December 99)
Objective: to setup and evaluate a concept for implementing
Integrated Services in an ATM PON-based access network
Participants:
 DSC/Tellabs (Denmark)
 Ericsson/Telebit (Denmark)
 UNI-C (Denmark)
 U. Politécnica de Madrid (Spain)
 University of Edinburgh (Scotland)
 Univ. Mining and Metalurgy (Poland)
 TeleDenmark (Denmark)
 Telekomunikacja Polska (Poland)
 PT Inovação (Portugal)
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Summary
Introduction
QoS in IP over ATM multicast networks
RSVP/Integrated Services
ATM
BTI field trials
BTI network architecture
Evaluation of field trials
Conclusions
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
QoS in IP over ATM multicast
networks
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Resource Reservation Protocol (RSVP)
Orientation Receiver-based
State Soft state
QoS setup time Separate from route establishment
QoS changes Dynamic QoS
Directionality Unidirectional resource allocation
Multicast Receiver heterogeneity
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
RSVP multicast reservation mechanisms
sender
RESV1
PATH
receiver 1
RESV2
receiver 2
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Asynchronous Transfer Mode (ATM)
RSVP
Orientation Receiver-based
State Soft state
QoS setup time Separate from route
establishment
ATM
Sender-based
Hard state
Concurrent with route
establishment
QoS changes Dynamic QoS
Static QoS
Directionality Unidirectional resource
allocation
Bidirectional allocation
for unicast
Unidirectional allocation
for multicast
Multicast Receiver heterogeneity
Uniform QoS
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
ATM multicast
multicast
server
multicast
mesh
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Multicast Address Resolution Server - MARS
MARS server
ClusterControl VC
{mcast IP address,
atm1, atm2, atm3}
MARS
MARS
Request
Multi
{mcast IP address}
atm3
atm2
atm1
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
RSVP with ATM multicast
 Mapping service classes:
 RSVP Guaranteed Service -> ATM CBR / rtVBR
 RSVP Controlled Load Service -> ATM ABR / nrtVBR
 Best effort -> ATM UBR / ABR
 Mapping traffic descriptors:
IS model parameters
 r – average token bucket rate
 p – peak data rate
 b – token bucket depth
 M – maximum packet size
 m – minimum policed unit size
ATM model parameters
 PCR
 SCR
 MBS
 CDVT
 Relationship RSVP flows/ATM VCs
 Other issues (e.g. multicast heterogeneity, dynamic QoS)
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
RSVP with ATM multicast
MARS SERVER
ClusterControl VC
B1
PATH
DATA
A
Pt-mpt ClusterControl VC
Pt-pt VC with MARS server
BE pt-mpt VC
BE pt-pt VC
B2
QoS pt-mpt VC
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
BTI Field Trials
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
BTI field trial sites
 Aarhus, Denmark
 Krakow, Poland
 Aveiro, Portugal
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
ATM PON architecture
SDH
VDSL
ADM
OLM
NT
ONU
OLT
ATM25
ONU
ATM25
ONU
NT
VDSL
ATM25
 Up to 16 Optical Network Units (ONUs)
 Customer interface - 25 Mbit/s ATM
 Customers connected directly to ONU or through VDSL modem
 PVC connection only
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Main BTI enhancements
 Implementation of ATM signalling control in the ATM PON
 Implementation of IPv6 in routers, application clients and servers
 Integration of RSVP, IPv6 and ATM multicast following the
Integrated Services model
 Implementation of MARS server and client components
 Development of a Winsock2 compatible protocol stack running
on Windows NT supporting IPv6, RSVP and ATM
 Adaptation of IPv4-based user applications to IPv6 with QoS
control through RSVP
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
BTI architecture
Remote sites/
Internet
NT
ONU
OLT
VDSL
ATM25
ADM
ONU
OLM
ATM25
ASW
Server
ONU
NT
VDSL
ATM25
IPv6 Router
(inc. MARS server)
QoS Appl.
RSVP
IPv6
Ethernet
RSVP
IPv6
UNI4.0
Q.SAAL
AAL5
ATM
Ethernet
SDH
UNI4.0
Q.SAAL
AAL5
ATM
SDH PON
ATM
PON VDSL
ATM
VDSL ATM25
QoS Appl.
RSVP
UNI4.0
IPv6
AAL5
ATM
ATM25
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
BTI Field Trial – Global Overview
PT ATM PVC
+
DANTE MBS
+
Nordunet
Denmark
trial network
Telebit
TBC2000
router
Portugal
trial network
Telebit
TBC2000
router
2 Mbit/s
ATM link
Poland
trial network
Telebit
TBC2000
router
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Portugal-Denmark IPv6 interconnection
Portugal
Telecom
ATM backbone
Dante MBS (TEN-155)
ATM PVC
IPv4-based
Nordunet
ATM PVC
Portugal
trial network
Denmark
trial network
IPv4
ATM
IPv6-over-IPv4 tunneling
IPv6
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
User evaluation - basic scenario
ONU
ASW
Field Trial Site A
ONU
Router
IPv6/ATM
Field Trial Site B
Router
ONU
ASW
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
BTI field trials: overall evaluation

BTI networking features were successfully implemented (e.g. IPv6,
RSVP, ATM signalling, multicast);

IPv6 interconnection of field trials was achieved; IPv6-IPv4
cooperation via tunneling was demonstrated as an effective tool for
interconnection of IPv6 islands;

Real users collaborated using QoS-enabled applications over IPv6
in the field trials; usability testing was carried out;

BTI Integrated Services over ATM PON network concept was
demonstrated and validated by the field trials;

Complexity of RSVP/ATM integration may be a problem against
widespread deployment of the solution.
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
Topics for further study
 Scalability evaluation of the BTI network concept
 Interworking with diffserv-based backbone networks
BTI
domain 2
BTI
domain 1
Diffserv
domain
BTI
domain 3
‹#›
Terena Networking Conference 2000, Lisboa 22-25 May
References
 RFC 1821 – “Integration of Real-time Services in an IP-ATM
Network Architecture”
 RFC 2022 – “Support for Multicast over UNI 3.0/3.1 based ATM
Networks”
 RFC 2380 – “RSVP over ATM Implementation Requirements”
 RFC 2381 – “Interoperation of Controlled-Load Service and
Guaranteed Service with ATM”
 RFC 2382 – “A Framework for Integrated Services and RSVP
over ATM”
‹#›