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

1

MB - NG

Status of Task 2 Traffic Generation and Measurement

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

2

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

3

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

4

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

5

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

6

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

7

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

8

MB - NG

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

9

MB - NG

Measurements and Methodology for MB-NG