HEP and IPv6 David Kelsey (STFC-RAL, UK) 3 Nov 2010 HEPiX, Cornell, Ithaca NY david.kelsey at stfc.ac.uk.

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HEP and IPv6 David Kelsey (STFC-RAL, UK) 3 Nov 2010 HEPiX, Cornell, Ithaca NY david.kelsey at stfc.ac.uk

Outline Some history US Federal directive Status of IPv4 address exhaustion The HEPiX Questionnaire Conclusions HEPiX and IPv6? – plans for the future 3 Nov 2010Kelsey, IPv6, HEPiX2

Some history HEP DECnet/OSI Phase V transition –European routing migration (early 90’s) –Phase IV was 16-bit addressing! CIDR (93) and NAT (94) saves IPv4 IPv6 - RFC2460 (Dec 1998) IPv6 address allocation starts July 1999 O/S and router support from ~2000 Many NRENs support IPv6 (~2003) HEPiX Spring 2008 (CERN) –Mattias Wadenstein (NDGF) talk on his IPv6 experience 3 Nov 2010Kelsey, IPv6, HEPiX3

History (2) HEPiX Fall 2008 (Taipei) –Fred Baker (CISCO) “IPv4/IPv6 Transition: Status and Recommendations” April 2010 – Andrew Daviel (TRIUMF) – to HEPiX list (8 April 2010) –What, if any, plans HEPiX institutions have for IPv6 migration? –Quote: “...monitoring, security and access control implications are somewhat scary.” 3 Nov 2010Kelsey, IPv6, HEPiX4

History (3) Lots of discussion followed by –Security, DHCP, monitoring, DNS,... We decided to have a session on IPv6 at the Spring 2010 (Lisbon) HEPiX –Then the volcano! 15 April 2010 – from Brian Carpenter (ex Head of CERN Networking) –Your IPv6 HEPiX session is mentioned on several IPv6 mail lists! Postponed session to this HEPiX meeting 3 Nov 2010Kelsey, IPv6, HEPiX5

History (4) I sent questionnaire at end of Sep 2010 –To HEPiX Board and later to full list 28 Sep 2010 –Memo from US Federal CIO –To all CIOs – Exec Departs & Agencies US DOE Labs clearly involved 3 Nov 2010Kelsey, IPv6, HEPiX6

US Federal transition to IPv6 committed to the operational deployment and use of IPv6 Enable successful deployment and expansion... such as Cloud Computing, Broadband, and SmartGrid... Reduce complexity and increase transparency of Internet services by eliminating the architectural need to rely on NAT... 3 Nov 2010Kelsey, IPv6, HEPiX7

Timelines – US Federal Upgrade public/external facing servers and services (e.g. web, , DNS, ISP services, etc) to operationally use native IPv6 by the end of FY 2012 Upgrade internal client applications that communicate with public Internet servers and supporting enterprise networks to operationally use native IPv6 by the end of FY 2014 Designate an IPv6 Transition Manager and submit their name, title, and contact information by October 30, Nov 2010Kelsey, IPv6, HEPiX8

IPv4 address exhaustion From Geoff Huston ( ) Projected IANA Unallocated Address Pool (global) Exhaustion: 09-Jun-2011 –Only 12/256 (/8) addresses are unallocated –< 5% Projected RIR Unallocated Address Pool (regional) Exhaustion: 22-Jan Nov 2010Kelsey, IPv6, HEPiX9

V4 address allocation last year 3 Nov 2010Kelsey, IPv6, HEPiX10

This is how we pictured the transition 15 years ago: What’s the problem? IPv6 Deployment IPv4 Pool Size Size of the Internet IPv6 Transition using Dual Stack Time Geoff Huston, Dave Wilson, HEAnet (Ireland) TNC2010

This is where we are now: Transition plan IPv6 Deployment IPv4 Pool Size Size of the Internet IPv6 Transition Today Time ? Geoff Huston,

HEPiX Questionnaire Many thanks to the 18 responders: Guillaume Cessieux (IN2P3), Andrew Daviel (TRIUMF), Phil DeMar (FNAL), Carlos Friacas (Portugal), Denise Heagerty (CERN), Jean-Michel Jouanigot (CERN), Andy Kowalski (JLAB), Pierrick Micou (IRFU), Francesco Prelz (INFN), Fazi Qi (IHEP, China), Sabah Salih (Manchester), Reinhard Strebler (KIT), Robin Tasker (RAL & DL), Steven Timm (FNAL), Rosette Vandenbroucke (Belgium), Mattias Wadenstein (Umea), Stephan Wiesand (DESY), Knut Woller (DESY) 3 Nov 2010Kelsey, IPv6, HEPiX13

Q1 Are you already supporting IPv6 now? If so are you using dual 4/6 stacks? Or perhaps someone is even using just IPV6 and NAT64? Yes:1 (IHEP, China) No:7 Testbed(s):5 NRENs: 6 Yes, 0 No Dual stacks everywhere, no NAT64 3 Nov 2010Kelsey, IPv6, HEPiX14

Q2 If you are not yet supporting IPv6 do you have plans? If so what are the timelines? 7 sites have plans for next 2 years –3 this year, 3 in 2011, 1 by 2012 –US directive will drive DOE labs 3 have no plans –waiting for new routers or for useful applications or for user pressure 3 Nov 2010Kelsey, IPv6, HEPiX15

Q3 Is anyone you know of working on the implications of v6 for applications? Have they done a survey of which applications are V6 compliant? Nobody doing anything on HEP applications –Concentrating on obvious apps ( browser, etc) gLite Grid middleware is 99% compliant (TNC2010) Some claim many apps are not V6 compliant –e.g. OpenAFS will not be compliant until (at least) Aug 2011 Condor busy working on V6 compliance List of some general application status: – 3 Nov 2010Kelsey, IPv6, HEPiX16

Q4 Do you currently have problems with lack of IPv4 addresses? Or foreseen in the near future? Very few problems reported (just 1 said Yes) –Manchester HEP has just 2 Class C nets Increasing amount of Virtualisation a concern Very large clusters may need V6 Increasing value of V4 addresses may lead to sale of unused addresses 3 Nov 2010Kelsey, IPv6, HEPiX17

Q5 Are there other issues you are aware of? Or interesting work going on in this area? No pressure, lack of effort/funding Concerns on monitoring, log-file analysis, security, network management tools, transition mechanisms Report that CMS needs at least 1-year to deploy new v6 code Planning must take several years Lower quality of vendor support Lack of maturity of software and tools Google and Facebook already publishing some content via IPv6 Push likely to come from China, India, Africa Also from growth of “sensor” networks and “social engineering space” 3 Nov 2010Kelsey, IPv6, HEPiX18

Conclusions IPv6: Infrastructure is the most advanced –NRENs have been “ready” for years Sites are not seeing any pressure (yet) –So, not much is happening –But the US directive will make a difference The big problem areas –Applications 3 rd party and homegrown (“we” have to work on these) Very much like Y2K (survey, plan, upgrade, replace) –Technical transition details Lack of maturity of tools, other concerns (e.g.security) 3 Nov 2010Kelsey, IPv6, HEPiX19

3 Nov 2010Kelsey, IPv6, HEPiX20 Questions? (then we will look at what to do next)

HEPiX and IPv6? IPv6-only systems will (soon?) arrive –Certainly will affect general Grids and Clouds e.g. FermiCloud decided to support IPv6,... –When will WLCG/HEP have to support IPv6-only systems? The range of applications in one community (e.g. HEP) is more constrained than trying to solve problems for everyone Different from the HEP DECnet/Phase V coordination –Then we spent most of our efforts on the routing, addressing and naming issues –Now I think we have to concentrate more on applications and tools –But we did learn that analysis and planning is essential and takes lots of time! 3 Nov 2010Kelsey, IPv6, HEPiX21

HEP Coordination In addition to applications –Work with Site and National networking experts –Security concerns –Monitoring –Network Management (end to end, not backbone) Positive benefits of learning together and sharing the work It will all take time –We are already late 3 Nov 2010Kelsey, IPv6, HEPiX22

My proposal Create a HEPiX IPv6 group Phase 1 should be to do a full (gap) analysis of the problem (during 2011) –Applications important to HEP Analyse IPv6 compliance –Security –System and network tools etc. Create and operate an HEP distributed testbed Propose a timetable for Phase 2 –Upgrades, implementation, deployment Must include an effort/resource requirements analysis 3 Nov 2010Kelsey, IPv6, HEPiX23