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AUTO: Robbie Woodley is out of the office (returning Mon 07/21/2008)
by Robbie_Woodley＠uttyler.edu 17 Jul '08

17 Jul '08

I am out of the office from Tue 07/15/2008 until Mon 07/21/2008. If you need immediate assistance please contact Tim Crouch at ext 7476 or Chris Green at ext 7190. Note: This is an automated response to your message RE: Managed, cheap, DC power switches sent on 7/17/2008 8:58:08 AM. This is the only notification you will receive while this person is away.

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Announcement : publicly available LISP and shim6 implementations
by Olivier Bonaventure 16 Jul '08

16 Jul '08

Hello, During the last years, there have been many discussions about the scalability of the Internet architecture notably within the IRTF RRG. With IPv6, thanks to its huge addressing space, it is possible to design protocols and mechanisms that are more scalable and more powerful than with IPv4. A typical example is the multihoming problem. This problem occurs when a site is attached to several Internet Service providers. With IPv4, the classical solution is for the site to obtain one IPv4 prefix and advertise it by using BGP. This solution works and traffic engineering is possible, but unfortunately, it contributes to a significant growth of the BGP routing tables in the global Internet. With IPv6, the IETF decided to focus on a host-based technique. Basically, when a site is attached to n providers, each of its hosts will receive n different IPv6 addresses. This reduces the size of the BGP routing tables by avoiding to advertise the IPv6 prefixes used by the stub domains and provide many additional benefits in terms of path diversity or performance. Now that the shim6 standardization is being finalized by the IETF, it is time to validate this approach experimentally in the IPv6 Internet. Sebastien Barré has developed the first publicly available implementation of the shim6 IPv6 host-based multihoming on the Linux kernel. LinShim6 is available form http://inl.info.ucl.ac.be Other approaches to better scale the Internet architecture are being discussed, notably within the Routing Research Group of the Internet Research Task Force. Several of these approaches rely on separating the two roles of IP addresses: the locator role and the identifier role. In today's IPv4 Internet, IPv4 addresses are used both to indicate the location in the Internet topology of a host (the locator role) and to terminate the transport flows on end-hosts (the identifier role). This means that it is difficult to change the IP address of a host without disrupting transport flows. The techniques that separate identifiers from locators take a different approach. First, an identifier is attached to each end-host. This identifier is used to terminate the transport flows. Second, each identifier may be reachable through multiple locators and a mapping mechanism is used to map an identifier (or a set of identifiers) onto a set of locators. This improves the scalability of the routing system as only the locators need to be distributed by BGP provided, of course, that the mapping system remains scalable. Furthermore, separating identifiers and locators has several additional benefits in terms of path diversity and performance. Some approaches propose to attach locators to hosts while other prefer to attach locators only to routers. The latter approach is the solution chosen by the proponents of the Locator/Identifier Separation Protocol (LISP). LISP is a router-based solution to solve the scaling problems of the Internet architecture that is currently being developed by Cisco. There are still many open questions concerning notably the mapping between identifiers and locators. To allow researchers and network operators to experiment with LISP, the IP Networking Lab of UCLouvain releases OpenLISP. OpenLISP is the first publicly available implementation of LISP on the FreeBSD kernel. OpenLISP was designed and implemented by Luigi Iannone. You can find more details about OpenLISP from http://inl.info.ucl.ac.be Best regards, Olivier Bonaventure

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Data about IPv6 fragmentation
by Fernando Gont 16 Jul '08

16 Jul '08

Hello folks, Is anybody aware of any papers with real-world data about IPv6 fragmentation? I'd be interested in something along the lines of: Shannon, C., Moore, D., and Claffy, K.C. 2001. Characteristics of Fragmented IP Traffic on Internet Links. (but that focuses on IPv6 fragmentation, rather than v4 fragmentation). Thanks! Kind regards, -- Fernando Gont e-mail: fernando(a)gont.com.ar || fgont(a)acm.org PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1

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Enterprise VoIP Survey
by nanog＠ryburn.org 16 Jul '08

16 Jul '08

Hello Everyone, I am doing a research project on VoIP deployment feasibility for a graduate degree. I am looking for people who have been involved with Enterprise level VoIP deployments that would be willing to fill out a short 10-15 question survey. Ideally I would like people who were involved in both the technical and financial aspects of the project. The survey will ask about costs and budgets but you do not need to provide the company who deployed the solution so all answers will be kept anonymous. If you are interested in participating in the survey, please unicast me and I will send you a copy of the survey. Thanks in advance for you help, -Justin

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Transit providers in Sri Lanka
by Skeeve Stevens 16 Jul '08

16 Jul '08

Greetings all, We've been asked to look at building an ISP in Sri Lanka and I wanted to know if anyone had any of the following: - Transit providers in Colombo - Types of handoff's common in this location (Ethernet, ATM, etc) - Expected US$/mb of flat-rate traffic - Datacentres in Sri Lanka - secure and protected Thanking you in advance for your advice. -- Skeeve Stevens, Managing Director eintellego Pty Ltd - The ISP Specialists skeeve(a)eintellego.net / www.eintellego.net Phone: (+612) 8197 2760, Fax: (+612) 8572 9954 Cell +61 (0)414 753 383 / skype://skeeve -- NOC, NOC, who's there?

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[NANOG-announce] Reminder: Presentation materials for NANOG44/45 are welcomed
by Ren Provo 16 Jul '08

16 Jul '08

Hi folks, The tentative agenda for NANOG44 will be released shortly and registration will open for the October meeting. There are many time slots marked as 'speaker - pending' or 'tutorial - pending' due to abstracts lacking actual presentations. We believe there are many good ideas lurking within the abstracts and highly encourage those who consider their submission a work in progress to complete the presentation portion and submit it to NANOG-Support(a)nanog.org today. Thanks! -Ren Provo, NANOG PC _______________________________________________ NANOG-announce mailing list NANOG-announce(a)nanog.org http://mailman.nanog.org/mailman/listinfo/nanog-announce

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First Call for Papers InfoSys 2009 [ICNS, ICAS, INTENSIVE], Valencia (Spain), April 21-25, 2009
by Jaime Lloret Mauri 16 Jul '08

16 Jul '08

Please consider to contribute and encourage your team members and fellow scientists to contribute to the following federated events. Thanks for forwarding the information on this Call for Submissions to those potentially interested to submit. ===== Call for Submissions ======= InfoSys 2009, April 21-25, 2009 - Valencia/Spain see: http://www.iaria.org/conferences2009/InfoSys09.html InfoSys 2009 is a federated event focusing on advances topics concerning the networking, services, autonomic and autonomous systems, and intensive services and applications. InfoSys 2009 continues the tradition of well-established conferences, ICNS and ICAS, and adds new trends on intensive services and applications (INTENSIVE). Submission deadline: November 1st, 2008 >> ICNS 2009, The Fifth International Conference on Networking and Services http://www.iaria.org/conferences2009/ICNS09.html >> ICAS 2009, The Fifth International Conference on Autonomic and Autonomous Systems http://www.iaria.org/conferences2009/ICAS09.html >> INTENSIVE 2009, The First International Conference on Intensive Applications and Services http://www.iaria.org/conferences2009/INTENSIVE09.html Submissions must be electronically done using the Submit a Paper button on the entry page of each conference. For details on the each conference's topics, see the individual Call for Papers for each conference. Unpublished high quality contributions in terms of Regular papers and Forum posters are welcome. Workshop proposals and Panel proposals on challenging topics are encouraged. Extended versions of selected papers will be published in IARIA on-line Journals (http://www.iariajournals.org) and in Special issues of different journals mentioned on the entry page of each conference. Submissions will be peer-reviewed, published by IEEE Computer Society Press, posted in IEEE Digital Library, and indexed via all the IEEE indexing agreements. -------------------------------- IARIA Publicity Board --------------------------------

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Re: Analysing traces for performance bottlenecks
by rcheung＠rochester.rr.com 15 Jul '08

15 Jul '08

Wireshark can show the throughput on a bits/sec or pps, by IP, etc. This is under IO Graphs. You'll want to change the time display format of the main decode window to Seconds Since Beginning of Capture to sync up time with the graph. At least that way, you can just focus on the dips in throughput in the graphs. Rick ---- Kevin Oberman <oberman(a)es.net> wrote: > > Date: Tue, 15 Jul 2008 11:05:34 +0100 > > From: Sam Stickland <sam_mailinglists(a)spacething.org> > > > > Hi, > > > > Are there any packages (or Wireshark options that I've missed) that can > > follow a TCP stream and determine the limiting factor on throughput. E.g > > Latency, packet loss, out of sequence packets, window size, or even just > > the senders rate onto the wire. I know how to analyse a trace by hand > > for performance issues, but it's relatively time consuming. > > > > Googling for variations on "Analyse TCP stream limit throughput" didn't > > find anything. > > tcptrace is old and pretty basic, but it can provide a LOT if > information. Combined with xplot, the graphs often point to the exact > nature of a TCP problem, but you need a really good understanding of TCP > to figure anything out. > -- > R. Kevin Oberman, Network Engineer > Energy Sciences Network (ESnet) > Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) > E-mail: oberman(a)es.net Phone: +1 510 486-8634 > Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751

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Peer1 outage in Vancouver
by Duane Cook 14 Jul '08

14 Jul '08

There is a power outage in downtown Vancouver, and apparently Peer1's UPS and/or Generators have failed. UPDATE by cpugsley on Mon Jul 14, 2008 10:10 am Upon further review the power outage has affected the entire Financial District. Generator 7 - the main generator in the Harbour Centre building that powers PEER 1 and other business worked for approximately 20 minutes after the power went out. The 16th floor data center and the 21st floor West data center are currently at a 90% power loss. The 21st floor North is now at 100% power loss. We've also learned that the UPS power is affected as well. The Harbour Centre building is working around the clock to restart the generator as quickly as possible. We will continue to provide updates as they are received. Thank you for your continued patience. Charnell Pugsley Community Evangelist PEER 1 Web - http://www.peer1.com Blog - http://www.peer1.com/blog http://www.peer1.com/forums/viewtopic.php?f=37&t=50&p=82#p82 Duane Cook

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VLAN Management Tool
by Fisher, Shawn 14 Jul '08

14 Jul '08

Do you folks have any experience with a practical VLAN management tool that allows a user to centrally manage VLAN creation and configuration for a multi-vendor environment? (Juniper, Cisco, Extreme, etc) Something that supports auto-discovery, Q-in-Q, good high level visualization, etc. Thanks in advance for your response, Shawn

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