qbone: building a testbed for ip differentiated services (update) ucaid member meeting 28 april 1999...
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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
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