Transcript Active Measurement tool for the EuQoS project

Active Measurement tool for the
EuQoS project
René Serral-Gracià
(Universitat Politècnica de Catalunya)
Outline
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Introduction
NetMeter
Working examples
Summary and Future Work
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Introduction (I)
• Internet is fast expanding
– New concerns
– ...
– Network performance
• Increasing needs of
– Bandwidth
– More and better services
• Videoconference
• VoIP
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Introduction (II)
• Usually new services require
– Low latencies
– Small Delay variations
– Few packet losses
• Network administrators need to know
– The real network’s performance
– If the network is able to provide the
desired service
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Introduction (III)
• Assuring the QoS of the network
– Bandwidth
– One Way Delay (OWD)
– Inter Packet Delay Variation (IPDV)
– Packet Losses
• Goal
– Develop a solid testing methodology
• NetMeter
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Outline
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Introduction
NetMeter
Working examples
Summary and Future Work
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NetMeter
• Overview
• Measurement capabilities
• Data analysis and representation
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Overview
• Basic scenario
Traffic
Source
Network
under test
Traffic
Destination
Test flow/s
Synchronization
Control traffic
Control traffic
Test
Manager
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Measurement Capabilities (I)
• Controlled data flows
– UDP
• Periodic
• Poisson
• Link bandwidth capacity
– TCP
• Link bandwidth capacity
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Measurement Capabilities (II)
• Active testing
– Controlled traffic
– End to End measurements
• Passive testing
– Multiple capture points
– Partial delays
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Measurement Capabilities (III)
• NetMeter’s characteristics
– GPL (http://www.ccaba.upc.edu/netmeter)
– Ongoing work
– Controlled data flows
– Non intrusive
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Data analysis/representation
• Typical QoS parameters (Numeric)
– Maximum
– Minimum
– Average
• Graphical representations
– Instantaneous
– Distributions
– Custom representations
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Outline
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Introduction
NetMeter
Working examples
Summary and Future Work
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Working examples
• Inter-Domain QoS Analysis (EuQoS)
– Combination of active and passive
methods
• 802.11 Handover study
– QoS preservation during handover
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Inter-Domain QoS Analysis
• Typical Inter-Domain scenario (EuQoS)
Traffic
Source Capture
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Traffic
Destination
Access
Network
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“QoS” domain
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Core IP
network
“QoS” domain
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Access
Network
2
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“QoS” domain
Test Manager
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Inter-Domain QoS Analysis
• Site to Site results
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Wireless analysis (I)
Correspondent
Node
• Handover analysis
– Layer 2
GPS
NTP-Server
• IPv6/Mobile IPv6
– Layer 3
• User’s level perception
Access
Router
• Tests
– 16 tests
802.11b
802.11b
• MN  CN
• CN  MN
– Flows
Home
Agent
Test Flow
MIPv6 Data
Control + NTP
Movement
Mobile Node
• VoIP - 64Kbps. 34 pps, 252 bytes/pkt
• UDP - 1Mbps. 94 pps, 1300 bytes/pkt
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Wireless analysis (II)
• Handover latency
– Wireless LAN (802.11)
• New Access Point association
– IPv6
• Router Advertisement
• Route expiration
• DAD
– Mobile IPv6
• Home Agent notification
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Wireless analysis (III)
• Handover behavior
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Wireless analysis (IV)
• Numerical results CN  MN
OWD (ms)
Before After
1Mbps 46.88 29.88
IPDV (ms)
Before After
153.77 6.39
• Numerical results MN  CN
OWD (ms)
Before After
VoIP 49.68 48.94
IPDV (ms)
Before After
6.92
7.08
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Outline
•
•
•
•
Introduction
NetMeter
Working examples
Summary and Future Work
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Summary
• NetMeter
– Active measurement
– Passive measurement
• NetMeter’s applicability
– Inter-Domain QoS Analysis
– Wireless LAN/IPv6/Mobile IPv6
– General End to End environment
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Future Work
• NetMeter
– Support for other traffic generation tools
• EuQoS
– Site to Site tests with QoS
• Mobile IPv6
– Test improvements with other protocols
• Fast Handovers
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Active Measurement tool for the
EuQoS project
René Serral-Gracià
(Universitat Politècnica de Catalunya)