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MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 1 Status of Task 2 Traffic Generation and Measurement.

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Presentation on theme: "MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 1 Status of Task 2 Traffic Generation and Measurement."— Presentation transcript:

1 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 1 Status of Task 2 Traffic Generation and Measurement

2 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 2 MB – NG SuperJANET4 Development Network Gigabit Ethernet 2.5 Gbit POS Access 2.5 Gbit POS core MPLS Admin. Domains Dark Fiber (SSE) RAL/ UKERNA OSM-4GE- WAN-GBIC WorldCom SuperJANET4 Production Network Leeds SJ4 Dev C-PoP Reading SJ4 Dev C-PoP Warrington SJ4 Dev C-PoP London WorldCom UCL OSM-4GE- WAN-GBIC OSM- 1OC48- POS-SS UCL OSM-4GE- WAN-GBIC MCC OSM-4GE- WAN-GBIC OSM- 1OC48- POS-SS MAN OSM-4GE- WAN-GBIC

3 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 3 The Scope and Progress  Task: Define Traffic and measurement systems needed to characterise the network  Network Characteristics  Measurements and systems  Background Load traffic  Two Face2Face and several VC to progress the work  4 Documents in preparation:  Network Metrics and Methodologies Framework  Measurements and Methodology for MB-NG  Proposed MB-NG QoS tests  Specification of background generation  Consideration of tools

4 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 4 Network Metrics and Methodologies Framework  Has set down understanding of Metrics (Network Characteristics)  Latency – 1-way, roundtrip  Loss – rate, distribution  Throughput  Connectivity and availability  Very much in line with GGF – although terminology a bit different  Like GGF has taken note of IETF IPPM work  Topics raised include  Accuracy and systematics/bias of the measurements – time  Status: Only needs editorial tidyup

5 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 5 Measurements and Methodology for MB-NG  Many good discussions – now clear what MB-NG requires to observe Network Characteristics - Both UDP and TCP traffic considered:  Latency – 1-way, roundtrip  Loss – rate, distribution  Throughput  Connectivity and availability  Web100 essential  A set of these measurements will be used for the Policies defined.  Useful experience from the play-pen / DataGrid & DataTAG / ATLAS  Need to include Protocol behaviour and MIB information.  Status: Document stalled due to EU demo

6 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 6 Proposed MB-NG QoS tests  Sets down how the measurement and background traffic could be combined and applied to various QoS scenarios:  BE (as reference)  EF & BE  BE & LBE  EF, BE & LBE  Some proposals for the parameters (BW, scheduling) for QoS Policies  Useful experience gained from the play-pen  Extending Task2 towards Task 8  Status: In Draft

7 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 7 Defining Background Traffic  Gained experience with using Smartbits – seems flexible – some scripts in use  Regular traffic - constant size packet, regular spaced in time  Poisson traffic - constant size, exponential spacing to form transient queues  Variable packet sizes too  Tools include UDPmon, iperf, …  Investigating code to generate traffic from long-tailed distributions  Still discussing:  IETF traffic mix - different sizes and different probability of each size sent  Play back of real traffic patterns generated from packet headers pre-recorded from suitable points of the production network. This might include: Video Conference traffic -> play back - rude/crude tools General traffic captured at edge of a site, e.g. Manchester  Web-bursty traffic – web mirror – wget

8 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 8

9 MB - NG MB-NG Meeting UCL 1 Nov 02 R. Hughes-Jones Manchester 9 Measurements and Methodology for MB-NG


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