PERT workshop TERENA NETWORKING CONFERENCE 2010 30 May

PERT workshop TERENA NETWORKING CONFERENCE 2010 30 May 2010 Bartek Gajda gajda@man. poznan. pl Poznan Supercomputing and Networking Center (PSNC) PIONIER (Polish NREN) connect • communicate • collaborate

PERT workshop Agenda Introduction to PERT and edu. PERT for newcommers Review of the current status Technical presentations and discussion from PERT teams 15. 30 Coffee break Technical presentations and discussion part 2 17. 30 End connect • communicate • collaborate 2

PERT workshop Agenda Introduction to PERT and edu. PERT for newcommers Review of current status Technical presentations and discussion from PERT teams 15. 30 Coffee break Technical presentations and discussion part 2 17. 30 End connect • communicate • collaborate 3

What is PERT ? PERT – The Performance Enhancement and Response Team • a virtual organization • made of networking experts • who help end-users diagnose and solve network performance issues. connect • communicate • collaborate 4

What is PERT ? (2) • End-user will contact the PERT either directly or through their standard IT support channels when their applications are not working normally PERT IT NOC connect • communicate • collaborate 5

What is PERT ? (3) • Typical areas of concern for users are: low throughput, slow response time for interactive applications and degradation (noise) • To diagnose such problems a PERT must consider the properties of the complete end-to-end path • One of the main functions of the PERT is to ask intelligent questions of those who have systems on that path, including end-users, system administrators, and network operators. connect • communicate • collaborate 6

Network Performance Problems Historically: Local (LANs) networks were faster than long distance circuits (the “wide-area”) have been the bottleneck in a network Today the difference in data rate between LANs and WANs is much reduced, The capacity of WAN - long distance circuits has significantly increased End-to-end performance bottle-necks may now occur at any point in a system – end-system (application, OS, hardware), LAN or WAN It is becoming more and more difficult for a non-expert end-user to diagnose their network performance issues connect • communicate • collaborate 7

Network Performance Problems The TCP performance problems had a wide variety of resolutions *: • 39% of the causes were solved by applying different network routing. • 27 % were related to TCP tuning on the end host. • 14 % were unidentified. • 11% were related to hardware issues. • 9% were solved by other solutions like resolving DNS performance problems. * Milestones MS 2. 3. 7 and 2. 3. 8: Specification of the Backbone and Campus PERT Support Monitoring Infrastructure connect • communicate • collaborate 8

Origins of the PERT Conception of the PERT … Jan 01 Internet 2 Meeting Performance Enhancement and Response Team To provide a support structure to investigate and resolve problems in the performance of applications over computer networks Comparable to CERT structure Realization of the PERT … Dec 2002 TERENA meeting GARR, TERENA, DANTE, SWITCH, CESnet, HEAnet and UKERNA committed to a practical trial of a basic PERT connect • communicate • collaborate 9

The GEANT PERT 2002 -2004 Informal, unregulated access to PERT; anybody can request PERT’s help PERT communicated via e-mail list Primary purpose of investigation was to improve PERT’s knowledge and experience Problems were addressed on a best efforts basis No dedicated Monitoring tools Round. Up tracking system (off-the-shelf) used connect • communicate • collaborate 10

The GEANT PERT 2002 -2004 The first practical implementation was done by a group of European National Research and Education Networks (NRENs) and DANTE Successful pilot service in the GÉANT project Centralized GN 2 PERT concept evolved into federated edu. PERT connect • communicate • collaborate 11

What is edu. PERT? Centralized GN 2 PERT concept evolved into federated edu. PERT Combines the independent PERTs: National (NREN) Local (Universities) Project PERTs Support of central services: Registration - registers new PERTs Accreditation - provides application forms to PERTs seeking accreditation and awards and/or revokes accreditation according to agreed policy Workshop, meetings Knowledge Base Reporting - compiles and submits monthly reports on edu. PERT activity Training connect • communicate • collaborate 12

The benefits of joining edu. PERT Access to the knowledge of experienced and/or qualified network engineers Access to advice about TCP/IP protocols, network topology, network status and history, adjacent networks (peers and customers) and read access to all network elements. Registered PERTs can access private contact details for all other registered and accredited PERTs, and can quickly and easily contact those engineers best placed to help investigate network performance issues. Accredited PERTs can request specific technical information from other accredited PERTs and they have greater privileges when running multi-domain network performance tests. edu. PERT is a simple, unconstrained structure that maximises resources and creativity, with no restrictions on how member PERTs interact with its users, or what tools and procedures must be used Training connect • communicate • collaborate 13

PERT workshop Agenda Introduction to PERT and edu. PERT for newcommers Review of current status Technical presentations and discussion from PERT teams 15. 30 Coffee break Technical presentations and discussion part 2 17. 30 End connect • communicate • collaborate 14

The GEANT PERT 2009 - now List of participating PERTs ARNES (Academic and research network of Slovenia) CSC (Finnish IT center for science administered by the Ministry of Education) SWITCH* (Swiss Education Network) * accredited PERT RESTENA (Réseau Téléinformatique de l'Education Nationale et de la Recherche) PIONIER (Polish Optical Internet) FCCN (Fundação para a Computação Científica Nacional) GÉANT 2 PERT (GÉANT 2, the high bandwidth, pan-European research network) DFN (German Research and Education Network) connect • communicate • collaborate 15

edu. PERT website - edupert. geant. net connect • communicate • collaborate 16

edu. PERT website structure - edupert. geant. net STRUCTURE About What is a PERT What is edu. PERT The benefits of joining edu. PERT Services GÉANT Services edu. PERT Knowledge Base Links to The PERT Knowledge base hosted by SWITCH Participating PERTs List of PERTs Participating PERTs details (more details available only after login for registered participants ) connect • communicate • collaborate 17

edu. PERT Knowledge Base Performance basics: How to report a performance problem, userperceived performance (responsiveness, throughput, reliability), Why latency is important, the "Wizard Gap“ Network performance metrics: OWD, RTT (bandwidth*delay product and "Long Fat Networks" (LFNs)), delay varation (Jitter), loss, reordering, MTU/Path MTU Network protocols Application protocols PERT Tools NREN tools and statistics: GÉANT, SWITCH (CH), PSNC (PL), HEAnet (IE), ISTF (BG), FCCN (PT), IUCC (IL), HUNGARnet (HU), RENATER (FR) Performance Case Studies PERT Case Histories (old) … connect • communicate • collaborate 18

edu. PERT within GN 3 – latest update Website moved to new doman edupert. geant. net Discussion list reactivated Open for subscribing Publicly available archive http: //mail. geant. net/mailman/listinfo/pert-discuss Documents for the community Milestones MS 2. 3. 7 and 2. 3. 8: Specification of the Backbone and Campus PERT Support Monitoring Infrastructure connect • communicate • collaborate 19

edu. PERT Cases - statistics Apr -09 May -09 Jun 09 Jul 09 Aug- Sep- Oct 09 09 09 Nov- Dec- Jan 09 09 10 Feb 10 Mar 10 New 2 5 2 1 4 7 8 8 0 7 7 4 Open 6 14 13 6 14 15 15 16 14 9 14 8 Closed 2 3 3 0 3 6 7 7 2 6 8 2 Total (open+ closed) 8 17 16 16 17 21 22 23 16 15 22 10 connect • communicate • collaborate 20

edu. PERT – plans for the future Additional 10 existing PERTs become registered part of edu. PERT: AMRES BRNET CESNET FUNET GARR GRNET LITNET HUNGERNET RENATER SANET edu. PERT website restructured, extended with new materials (brochure) and linked to GN 3 portal Collaboration with existing and potential national and organisational PERTs established (e. g. Internet 2, LHCOPN, DEISA, Red. Clara) connect • communicate • collaborate 21

TERENA NREN Compendium 2008 http: //www. terena. org/activities/compendium/2008 -> Network Connectivity and services PERT team is present within following NRENs (but not registered in edu. PERT): AMRES Serbia Akademska mreža Srbije BASNET Belarus Byelorussian Academy of Sciences Network BREN Bulgarian Research and Education Network CERIST Algerian Research Network CESNET Czech Republic Funet Finland GARR Italy GRENA Georgia GRNET S. A. Greece LITNET Lithuania Academic and Research Network in Lithuania NIIF/HUNGARNET Hungary Hungarian Research and Education Network RBNet/RUNNet Russian Backbone Network RENATER France National Telecommunication network for Technology Education and Research SANET Slovakia Slovak Academic Network Georgian Research and Educational Networking Association connect • communicate • collaborate 22

TERENA NREN Compendium 2008 http: //www. terena. org/activities/compendium/2008 -> Network Connectivity and services PERT team is absent within following NRENs, but plan to deploy: AARNet Australia's Academic and Research Network Within 3 years ACOnet Austrian Academic Computer Network Within 3 years BELNET Belgium Within 3 years CARNet Croatia Within 1 year CYNET Cyprus Within 3 years DFN Germany Deutsche Forschungsnetz Within 1 year IUCC Israel Inter University Computation Center Within 3 years MARNet Within 1 year MARWAN Morocco Within 1 year MREN Montenegro Within 3 years NI-C Denmark Within 1 year NREN Nepal Research and Education Network Within 1 year Red. IRIS Spain Red. IRIS Network Management Centre Within 1 year RENAM Moldova Research and Educational Network of Moldova Within 3 years RHnet Iceland The Icelandic University Research Network Within 3 years Ro. Edu. Net Romanian National Research and Education Network Within 1 year ULAKBIM Turkey Within 3 years UNI-C Denmark Within 1 year UNINETT Norway Uo. M/Ricerka. Net Malta Within 3 years connect • communicate • collaborate Within 3 years 23

PERT workshop Agenda Introduction to PERT and edu. PERT for newcommers Review of current status Technical presentations and discussion from PERT teams 15. 30 Coffee break Technical presentations and discussion part 2 17. 30 End connect • communicate • collaborate 24

PERT workshop Technical presentations connect • communicate • collaborate 25