January 2013 - Test - lists.nanog.org

CGN fixed/hashed nat question
by Eric Oosting 23 Jan '13

23 Jan '13

Let me start out by saying I'm allergic to CGN, but I got to ask the question: Some of the CGN providers are coming out with "fixed" nat solutions for their IPv6 transition/IPv4 preservation technologies to reduce logging. This appears to provide for a static mapping of outside ports/IPs to a particular customer such that the service provider doesn't need to log literally every session through the box. At the last nanog, I seem to remember someone stepping up and discussing the problems associated with just taking ports 1025 through 1025+X and giving it to some customer and had brought up the idea of using a hash or salt to map what would appear to be random ports to a customer in such a way that you could reverse the port back to the customer later if need be. For the life of me, I can't find anything on the internets about this concept. I had it in my head it was a lightning talk or something, but reviewing the agenda doesn't ring any bells. Anyone know what I'm talking about and what it's called? -e

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Re: Security reporting response handling [was: Suggestions for the future on your web site]
by Scott Weeks 23 Jan '13

23 Jan '13

--- oscar.vives(a)gmail.com wrote: From: " ." <oscar.vives(a)gmail.com> weak. A more realistic reason is moral panic // he is making us look bad. Making stupid people look stupid should not be a crime. ------------------------------------------------- It's his wake up call ... oops, I mean his 'welcome' to the wonderful world of corporate/government/university politics. Welcome kid. This is what it's going to be like until you're too old to care... >;-) scott

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Re: IP Address Management IPAM software for small ISP
by Chris Conn 23 Jan '13

23 Jan '13

> looking for IPAM solutions for a small regional wireless ISP. > There are 4 Tier 2 personnel and 2 NOC technicians who would be using > the tool, and a small staff of engineers. > Nobody uses HaCI?

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Re: Suggestions for the future on your web site: (was cookies, and before that Re: Dreamhost hijacking my prefix...)
by Scott Weeks 23 Jan '13

23 Jan '13

--- jfmezei_nanog(a)vaxination.ca wrote: From: Jean-Francois Mezei <jfmezei_nanog(a)vaxination.ca> Either way, you still need to have either a cookie or a hidden form [...] ------------------------------------------------ But ONLY when needing to do a transaction. As I originally mentioned why force a cookie just to look around: no cookie, no lookie. :-( scott

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Tw telecom noc/routing contact needed
by Eric J Esslinger 22 Jan '13

22 Jan '13

I've been fighting with an issue with a Time Warner Telecom customer whose site is unreachable from our ip blocks, as well as a number of other ip blocks within my upstream's network according to the call I made to them. All I'm getting through listed arin contacts are apparantly unmonitored maildrops and customer contact numbers that won't put me through to a live person without a valid TW phone or circuit number. Based on the behavior I suspect a reverse routing issue back to our ip blocks but have been unable to get much help from the other end of the problem. I need to speak to someone, and if someone reading this list can has info but doesn't want to share it, if they can pass my contact info on I can be contacted via this email or the phone number in my signature. Thank you. __________________________ Eric Esslinger Information Services Manager - Fayetteville Public Utilities http://www.fpu-tn.com/ (931)433-1522 ext 165 This message may contain confidential and/or proprietary information and is intended for the person/entity to whom it was originally addressed. Any use by others is strictly prohibited.

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DNS resolver addresses for Sprint PCS/3G/4G
by Jay Ashworth 22 Jan '13

22 Jan '13

I've noticed, for quite some time, that there seems to be a specific category of slow that I see in using apps on my HTC Supersonic/Sprint EVO, on both their 3G and 4G networks, and I wonder if it isn't because the defined resolvers are 8.8.4.4 and 8.8.8.8, which aren't *on* Sprint's networks. Does anyone have, in their magic bag of tricks, IP addresses for resolvers that *are* native to that network, that they wouldn't mind whispering in my ear? I don't suppose Android's smart enough to swap that file around when the IP core notices the uplink has changed? (Yes, I know, that's properly a question for XDA-Devel...) Offlist is fine. Yes, I owe the list summaries on a couple earlier questions; I still have the details to write from. :-} Cheers, -- jra -- Jay R. Ashworth Baylink jra(a)baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274

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L2 redundant VPN
by Tomas Podermanski 22 Jan '13

22 Jan '13

Hi networking guys, I need some help :-). We try to find for our department reliable solution for L2 VPN. The task is to connect two remote data centers, each of them connected two 1Gbps lines (with link aggregation). Only IP connectivity between data centers is available (so there is no possibility to create circuit based on MPLS or something like that). The basic problem is that high reliability is required, so the solution have to be fully redundant. The initial idea was about two OpenVPN servers in each data center + two switches (HP E5800) joined into one logical switch via VRF. The link failure is based on LACP packets between both data centers. The solution works, however performance of OpenVPN is really creepy. The maximum we were able to get from this configuration was about 100Mbps. We expect at least 500Mbps (or more in the future). In our thoughts then we were thinking about l2tp on some cisco/HP(H3C) device, however there is little information about performance of that solution and I am not sure how the failure detection would work in redundant configuration. Have anybody some experience with similar solution or at least any idea ? Thanks a lot for thoughts Tomas

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Multicast over GRE between Linux server and Cisco Router
by Brian Christopher Raaen 22 Jan '13

22 Jan '13

I am trying to set up multicast between a Linux server and Router using GRE. The GRE tunnel is up fine and I can see traffic go across it, but the router is not indicating it is receiving the IGMP joins that the server is sending. I have identical setting with another server attached to fastethernet0/1 and it is joined to the group fine, but I am not able to get the server to link to the router via GRE interface. Note that I have another server behind another router where the two routers do GRE and PIM and that on is working fine. Is there some reason that IGMP joins would not work across the GRE link, but another router using PIM would? -- Brian Christopher Raaen Network Architect Zcorum

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Re: Equipment Shuffing Cart Recommendations (Mike Hale)
by Travis Foschini 21 Jan '13

21 Jan '13

I recently purchased a couple of these collapsible carts @ for the same purpose and they work very well... http://www.frys.com/product/6390451?site=sr:SEARCH:MAIN_RSLT_PG They're a tad difficult to close after use but I expect they'll relax and ease after additional use. Regards, Travis Foschini > On Jan 21, 2013, at 11:28, Michael Vallaly <nanog(a)nolatency.com> wrote: > > > > > Anyone have any good recommendations for an equipment cart to shuffle > IT/Telco equipment around between an office/colo ? > > > > Id like something able to carry ~6 1U Dell servers at once, and maybe make > it over an elevator gap without a running start. Collapsible would also be > nice, if I can throw it in the back of a car once in a while is a big plus. > > > > Thanks > > > > -Mike > > > > -- > > Michael Vallaly <mvallaly(a)nolatency.com>

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Call For Papers: EuroMPI 2013 Madrid, Spain
by Javier Garcia Blas 21 Jan '13

21 Jan '13

Dear Sir or Madam, (We apologize if you receive multiple copies of this message) ============================================================ Recent Advances in Message Passing Interface. 20th European MPI Users' Group Meeting (EuroMPI 2013) EuroMPI 2013 is being held in cooperation with SIGHPC Madrid, Spain, September 15-18, 2013 www.eurompi2013.org BACKGROUND AND TOPICS ------------------------------- EuroMPI is the preeminent meeting for users, developers and researchers to interact and discuss new developments and applications of message-passing parallel computing, in particular in and related to the Message Passing Interface (MPI). The annual meeting has a long, rich tradition, and the 20th European MPI Users' Group Meeting will again be a lively forum for discussion of everything related to usage and implementation of MPI and other parallel programming interfaces. Traditionally, the meeting has focused on the efficient implementation of aspects of MPI, typically on high-performance computing platforms, benchmarking and tools for MPI, short-comings and extensions of MPI, parallel I/O and fault tolerance, as well as parallel applications using MPI. The meeting is open towards other topics, in particular application experience and alternative interfaces for high-performance heterogeneous, hybrid, distributed memory systems. Topics of interest include, but are not limited to: - MPI implementation issues and improvements - Extensions to and shortcomings of MPI - Tools and environments for MPI - Hybrid and heterogeneous programming with MPI and other interfaces - Relation of MPI to alternative interfaces for hybrid/heterogeneous distributed memory systems - Interaction between message-passing software and hardware, in particular new high performance architectures - Fault tolerance in message-passing implementations and systems - Performance evaluation for MPI and MPI based applications- - Automatic performance tuning of MPI applications and implementations - Verification of message passing applications and protocols - Applications using message-passing, in particular in Computational Science and Scientific Computing - Non-standard message-passing applications - Parallel algorithms in the message-passing paradigm - Algorithms using the message-passing paradigm The meeting will feature contributed talks on the selected, peer-reviewed papers, invited expert talks covering upcoming and future issues, a vendor session where selected vendors will present their new developments in hybrid and heterogeneous cluster and high-performance architectures, a poster session, and a tutorial day. The scientific part of the conference is organized in cooperation with ACM SIGHPC. Conference proceedings will be published in the ACM Digital Library, which includes short and long papers, workshop papers, and posters. Selected high quality papers will be published in an international journals. There will also be a reward for the overall best paper from the academic conference. WORKSHOPS ------------------------------- IMUDI SPECIAL SESSION ON IMPROVING MPI USER AND DEVELOPER INTERACTION The IMUDI special session, to be held as a full-day meeting at the EuroMPI 2013 conference in Madrid, Spain, focuses on bringing together the MPI end-user and MPI implementor communities through discussions on MPI usage experiences, techniques, and optimizations. This meeting will focus on evaluating the MPI standard from the perspective of the MPI end-user (application and library developers) and address concerns and insights of MPI implementors and vendors. Unlike workshops associated with other conferences, the IMUDI session is still considered to be a part of the Euro MPI conference. Submissions will be reviewed separately to facilitate bringing together research publications falling into these "special focus" areas. More info at: http://press.mcs.anl.gov/imudi/ ENERGY-EFFICIENT HIGH PERFORMANCE COMPUTING & COMMUNICATION WORKSHOP (E2HPC2) 2013 The first Energy-Efficient High Performance Computing & Communication workshop will be co-located with EuroMPI 2013 in Madrid. Energy-awareness is now a main topic for HPC systems. The goal of this workshop is to discuss latest researches on the impact and possibles leverages of communications for such systems. E2HPC2 solicits original and non-published or under-review articles on the field of energy-aware communication in HPC environment. This workshop is co-located with EuroMPI as MPI is the main communication interface in those environments. More info at: http://www.irit.fr/~Georges.Da-Costa/e2hpc2.html PBIO 2013: INTERNATIONAL WORKSHOP ON PARALLELISM IN BIOINFORMATICS In Bioinformatics, we can find a variety of problems which are affected by huge processing times and memory consumption, due to the large size of biological data sets and the inherent complexity of biological problems. In fact, Bioinformatics is one of the most exciting research areas in which Parallelism finds application. Successful examples are mpiBLAST or ClustalW-MPI, among many others. In conclusion, Bioinformatics allows and encourages the application of many different parallelism-based technologies. The focus of this workshop is on MPI-based approaches, but we welcome any technique based on: multicore and cluster computing, supercomputing, grid computing, cloud computing, hardware accelerators as GPUs, FPGAs, or Cell processors, etc. More info at: http://arco.unex.es/mavega/pbio2013/ SUBMISSION INFORMATION ------------------------------- Contributors are invited to submit a full paper as a PDF document not exceeding 6 pages in English. The title page should contain an abstract of at most 100 words and five specific, topical keywords. The paper must be formatted according to double-column ACM ICPS proceedings style. The usage of LaTeX for preparation of the contribution as well as the submission in camera ready format is strongly recommended. Style files can be found at http://www.acm.org/publications/icps-instructions/. New work that is not yet mature for a full paper, short observations, and similar brief announcements are invited for the poster session. Contributions to the poster session should be submitted in the form of a two page abstract. All contributions will be fully peer reviewed by the program committee. Papers shall be submitted electronically via Easychair, see http://www.easychair.org/conferences/?conf=eurompi2013. AWARDS ------------------------------- There will be awards for the best paper and best student paper. These awards will be chosen by the program committee. The best paper award will be given to the paper judged to have the highest overall quality. SCHEDULE, IMPORTANT DATES ------------------------------- - Submission of full papers and poster: March 29th, 2013 - Author notification: May 11th, 2013 - Camera Ready papers due: June 15th, 2013 - Tutorial(s): September 15th, 2012 - Conference: September 16th-18th, 2013 COMMITTEE ------------------------------- GENERAL CHAIR Jack Dongarra, University of Tennessee, Knoxville, USA ORGANIZERS, PC CHAIRS Javier Garcia Blas, Carlos III University (fjblas(a)inf.uc3m.es) Jesus Carretero, Carlos III University (jesus.carretero(a)uc3m.es) PROGRAM COMMITTEE Pavan Balaji, Argonne National Laboratory Siegfried Benkner, University of Vienna George Bosilca, Innovative Computing Laboratory - University of Tennessee Gil Bloch, Mellanox Technologies Ron Brightwell, Sandia National Laboratories Darius Buntinas, Argonne National Laboratory Franck Cappello, INRIA and University of Illinois at Urbana-Champaign Yiannis Cotronis, National and Kapodistrian University of Athens Chi-Yin Chow, Department of Computer Science, City University of Hong Kong Anthony Danalis, University of Tennessee Luiz Derose, Cray Christian Engelmann, Oak Ridge National Laboratory Edgar Gabriel, University of Houston Brice Goglin, INRIA Ganesh Gopalakrishnan, University of Utah David Goodell, Argonne National Laboratory Richard Graham, Oak Ridge National Laboratory William Gropp, University of Illinois at Urbana-Champaign Rainer Keller, HFT Stuttgart, University of Applied Science Julian Kunkel, Universitat Hamburg Thomas Herault, University of Tennessee Bronis De Supinski, Lawrence Livermore National Laboratory Thomas Ludwig, German Climate Computing Center and University of Hamburg David E. Singh, University Carlos III of Madrid Torsten Hoefler, ETH Zurich Atsushi Hori, RIKEN AICS Florin Isaila, University Carlos III of Madrid Akihiro Inokuchi, Osaka University Yutaka Ishikawa, Graduate School of Information Science and Technology / Information Technology Center, The University of Tokyo Emmanuel Jeannot, INRIA Dries Kimpe, Argonne National Laboratory Jesper Larsson Traf, Vienna University of Technology Alexey Lastovetsky, UCD School of Computer Science & Informatics Laurent Lefevre, INRIA Dong Li, Oak Rdige National Lab Ewing Lusk, Argonne National Laboratory Teng Ma, NetApp Inc Guillaume Mercier, ENSEIRB/INRIA Bernd Mohr, Juelich Supercomputing Center Raffaele Montella, Department of Applied Science - University of Naples Parthenope Julian David Morillo Pozo, Barcelona Supercomputing Center Matthias Mueller, ZIH, TU Dresden Jose Nelson Amaral, University of Alberta Jaechun No, Sejong University Maria S. Perez, Technical University of Madrid Rolf Rabenseifner, HLRS, University of Stuttgart Rolf Riesen, IBM Gudula Runge, Chemnitz University of Technology Mitsuhisa Sato, University of Tsukuba Christian Siebert, RWTH Aachen University Anna Sikora, DACSO - UAB Shinji Sumimoto, Fujitsu Laboratories Frederic Suter, IN2P3 Computing Center Jeff Squyres, Cisco Alexander Supalov, Intel GmbH Domenico Talia, Universita della Calabria Vinod Tipparaju, AMD Rajeev Thakur, Argonne National Laboratory Carsten Trinitis, University of Bedfordshire Yuichi Tsujita, Kinki University Denis Trystram, Grenoble university Keith Underwood, Intel Mateo Valero, Barcelona Supercomputing Center Alan Wagner, University of British Columbia Roland Wismulle, University of Siegen Roman Wyrzykowski, Czestochowa University of Technology Xin Yuan, Florida State University CONFERENCE FEES ------------------------------- The conference will hopefully be well supported by sponsors, which will help directly towards keeping the fees low. As far as possible, special student fees will be offered.

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