mb - ng mb-ng meeting ucl 1 nov 02 r. hughes-jones manchester 1 status of task 2 traffic generation...
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MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
Status of Task 2 Traffic Generation and Measurement
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
MB – NG SuperJANET4 Development Network
Gigabit Ethernet2.5 Gbit POS Access2.5 Gbit POS coreMPLS Admin. Domains
Dark Fiber (SSE)
RAL/UKERNAOSM-4GE-WAN-GBIC
WorldCom
SuperJANET4ProductionNetwork
Leeds
SJ4 DevC-PoP
Reading12416
SJ4 DevC-PoP
Warrington12416
SJ4 DevC-PoPLondon12416
WorldComWorldCom UCLOSM-4GE-WAN-GBIC
OSM-1OC48-POS-SS
UCLOSM-4GE-WAN-GBIC
MCCOSM-4GE-WAN-GBIC
OSM-1OC48-POS-SS
MANOSM-4GE-WAN-GBIC
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG 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
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
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
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
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
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
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
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG 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
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
MB-NG Meeting UCL 1 Nov 02R. Hughes-Jones Manchester
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MB - NG
Measurements and Methodology for MB-NG