QBone:Building a Testbed for IP Differentiated

Services (Update)

UCAID Member Meeting28 April 1999

Washington D.C.

Phil Emer<phil@ncstate.net>

Summary

• Applications are drivers• Qbone has an initial set of membership for focus

– guidelines for expanding the membership while maintaining a hands-on focus

• Qbone network service– can’t do overlay (well not really)– edge-to-edge focus (campus service independent)

• Credit where it’s due– Ben Teitelbaum, Internet2, Fearless leader– Susan Hares, Merit, Bandwidth Broker (BB) – Matt Zekauskas, I2, Measurements– Rudiger Geib, DT, ALL

• Existing stalemate:

• QBone initiative seeks to turn the arrows around and create positive feedback:

Apps QoS

Enables

Motivate

Apps QoS

Inhibited

Prevented

Apps Networking Circularity

The Internet2 QBone Initiative

• Build interdomain testbed infrastructure – Experiment and improve understanding– Incrementally improve testbed

• Support intradomain & interdomain deployment

• Lead and follow IETF standards work– Some parts of DiffServ architecture cooked; others far from it

– Our experience will inform standards process

• Openness of R&E community gives us an edge• Users will tolerate the flakiness of an experimental infrastructure

• Engineers will share experience and measurement data

• QBone as “infrastructure that only a graduate student could love”

QBone Architecture (10km view)

• Subset of IETF DiffServ Architecture– Jacobson's VLL "Premium" Service

• Zero drops• Very low jitter

– SLA “musts”• EF PHB supported at every hop (so no overlays)• Policing of behavior aggregates (BA’s) to specified peak rate• Out-of-profile packets are dropped

– “Should”s• Shaping BA on egress• Conditioning by ingress/egress pairs

• Plus, Value-Adds– Integrated measurement infrastructure– Common operational practices– Pre-standards inter-BB signaling

......

Initial QBone Participants and Connectivity*

* Actual connectivity and participant group will vary as deployment progresses

OtherNGIXs

ESNet NREN

Abilene

UMass

UMN

vBNS

MAGPI NYSERNetTexas GP PSCNCNI

CA*Net2

APAN

SingAREN SURFNet

Merit

UMichUPennCMUTAMU Duke NCSU UNC

CTIT

IU

EVLiCAIRNWUUBC

ARDNOC

NTU

NUS

LBNL

AmesANL

KDD Labs

Korea

11 February, 1999

RISQ

CRC UNB

MREN /STAR TAP

Other DOE Labs

Other NASA Labs

A QBone Demo Testing Premium Service

RT Stereo Video Source

RT StereoVideo

VideoConferencin

g

ATM

DiffServ Router

DiffServ Router

DiffServ Router Etherne

t Switch

Policy Server

Nano-Manipulator

Client

LDAP Server

LDAP

COPS

DiffServ Router

VideoConferencin

g

Nano-Manipulator

Highway 1 Washington D.C

NC State Raleigh

MCNC, RTP

UNC, Chapel Hill

Controlled Contending Best

Effort Traffic

Marking Policing Shaping

Marking Policing Shaping

Policing Shaping Marking

Premium service contends with Best Effort traffic Limited resources require limited granting of Premium

service to high-performance applications

Ethernet Switch

DiffServ Router