Active Measurement tool for the EuQoS project René Serral-Gracià (Universitat Politècnica de Catalunya)

2 Outline Introduction NetMeter Working examples Summary and Future Work

3 Introduction (I) Internet is fast expanding –New concerns –... –Network performance Increasing needs of –Bandwidth –More and better services Videoconference VoIP

4 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

5 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

6 Outline Introduction NetMeter Working examples Summary and Future Work

7 NetMeter Overview Measurement capabilities Data analysis and representation

8 Overview Basic scenario Network under test Traffic Source Traffic Destination Test Manager Control traffic Test flow/s Synchronization

9 Measurement Capabilities (I) Controlled data flows –UDP Periodic Poisson Link bandwidth capacity –TCP Link bandwidth capacity

10 Measurement Capabilities (II) Active testing –Controlled traffic –End to End measurements Passive testing –Multiple capture points –Partial delays

11 Measurement Capabilities (III) NetMeter’s characteristics –GPL ( –Ongoing work –Controlled data flows –Non intrusive

12 Data analysis/representation Typical QoS parameters (Numeric) –Maximum –Minimum –Average Graphical representations –Instantaneous –Distributions –Custom representations

13 Outline Introduction NetMeter Working examples Summary and Future Work

14 Working examples Inter-Domain QoS Analysis (EuQoS) –Combination of active and passive methods Handover study –QoS preservation during handover

15 Inter-Domain QoS Analysis Typical Inter-Domain scenario (EuQoS) Access Network 1 Core IP network “QoS” domain Access Network 2 Test Manager Traffic Source Traffic Destination Capture 1234

16 Inter-Domain QoS Analysis Site to Site results

17 Wireless analysis (I) Handover analysis –Layer 2 IPv6/Mobile IPv6 –Layer 3 User’s level perception Tests –16 tests MN  CN CN  MN –Flows VoIP - 64Kbps. 34 pps, 252 bytes/pkt UDP - 1Mbps. 94 pps, 1300 bytes/pkt Home Agent Access Router GPS NTP-Server Mobile Node Correspondent Node b Test Flow MIPv6 Data Control + NTP Movement

18 Wireless analysis (II) Handover latency –Wireless LAN (802.11) New Access Point association –IPv6 Router Advertisement Route expiration DAD –Mobile IPv6 Home Agent notification

19 Wireless analysis (III) Handover behavior

20 Wireless analysis (IV) Numerical results CN  MN Numerical results MN  CN OWD (ms)IPDV (ms) BeforeAfterBeforeAfter 1Mbps OWD (ms)IPDV (ms) BeforeAfterBeforeAfter VoIP

21 Wireless analysis (V) Importance of the Medium Access algorithm

22 Outline Introduction NetMeter Working examples Summary and Future Work

23 Summary NetMeter –Active measurement –Passive measurement NetMeter’s applicability –Inter-Domain QoS Analysis –Wireless LAN/IPv6/Mobile IPv6 –General End to End environment

24 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

Active Measurement tool for the EuQoS project René Serral-Gracià (Universitat Politècnica de Catalunya)