- ripe-atlas - mailman.ripe.net

survey on performance measurement platforms and related standards
by Bajpai, Vaibhav 08 Apr '15

08 Apr '15

Dear RIPE Atlas WG, I would like to share something with you today. As you know, IETF LMAP [1] is making efforts to standardize large-scale measurements to allow divergent measurement platforms to converge towards interoperability. Early discussions within this group often lead to folks asking for feature sets and possibilities of each contemporary performance measurement platform. So we started digging literature work in this space and found that although there were surveys on topology-based measurement platforms (such CAIDA Ark et al.); literature work on performance measurement platforms (such as RIPE Atlas, SamKnows et al.) was missing. Therefore, we started writing such a survey in 2013 to plug this gap and also complement this with current state of IETF standardization efforts happening within the LMAP and IPPM working groups. This work got published and came online this week. I thought would share this with you: ----------------8<-----------------8<-----------------8<-----------------8< A Survey on Internet Performance Measurement Platforms and Related Standardization Efforts Vaibhav Bajpai, Jürgen Schönwälder IEEE Communications Surveys & Tutorials April, 2015 A number of Internet measurement platforms have emerged in the last few years. These platforms have deployed thousands of probes at strategic locations within access and backbone networks and behind residential gateways. In this paper we provide a taxonomy of these measurement platforms on the basis of their deployment use-case. We describe these platforms in detail by exploring their coverage, scale, lifetime, deployed metrics and measurement tools, architecture and overall research impact. We conclude the survey by describing current standardization efforts to make large-scale performance measurement platforms interoperable. DOI: http://dx.doi.org/10.1109/COMST.2015.2418435 Author Copy: http://vaibhavbajpai.com/documents/papers/proceedings/lsmp-comst-2015.pdf ----------------8<-----------------8<-----------------8<-----------------8< Thanks! [1] https://datatracker.ietf.org/wg/lmap Best, Vaibhav ===================================================== Vaibhav Bajpai Research I, Room 91 Computer Networks and Distributed Systems (CNDS) Lab School of Engineering and Sciences Jacobs University Bremen, Germany www.vaibhavbajpai.com =====================================================

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TNNet Oy Ltd (FI JYV)has joined RIPE Atlas anchors
by Eamonn Lane 02 Apr '15

02 Apr '15

Dear RIPE Atlas users, We're happy to announce that another RIPE Atlas anchor has joined the network and is now available as a target for probe hosts conducting their own user-defined measurements. The new anchor is called fi-yyv-as30798 and is hosted by TNNet Oy Ltd in Jyvaskyla, Finland. Anchoring measurements (ping, ping6, traceroute and traceroute6) are scheduled towards this anchor from all the other anchors as well as several hundred probes, providing a continual overview of regional reachability. Results of these measurements are available as raw data in JSON format, and visualised on the map and "seismograph" with many configurable features. You can access the anchoring measurements for all anchors at: https://atlas.ripe.net/anchors/list/ Learn more about RIPE Atlas anchors at: https://atlas.ripe.net/about/anchors/ Thank you for participating in RIPE Atlas! Kind regards, RIPE Atlas Team RIPE NCC atlas(a)ripe.net

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Finding out the number of simultaneous measurements
by Sebastian Castro 01 Apr '15

01 Apr '15

Hi: While running some measurements for a research work we are doing, I encountered this error "You can't have more than 100 simultaneous measurements". I'm not surprised, because I have some long term measurements running, but the bulk of them are one-off. Although I could throttle my measurements in little batches, I would prefer a way to programmatically query Atlas and find out how many measurements I'm running. The API allows you to get the list of public measurements, but running the query with an API key for my account doesn't change the output. Is there a way to do this with the API? Cheers, -- Sebastian Castro Technical Research Manager NZRS Ltd. desk: +64 4 495 2337 mobile: +64 21 400535

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Prototype of "Traceroute-consistency-check" completed
by Valentino Di Donato 31 Mar '15

31 Mar '15

Hello everybody, just to be fair I completed my prototype with the idea reported in my presentation. Everything is on github here: https://github.com/vdidonato/Traceroute-consistency-check This is just a snapshot: Best, Valentino -- Valentino Di Donato Department of Engineering <http://ingegneria.uniroma3.it> Roma Tre University <http://www.uniroma3.it/> Phone: +39.06.57333215 Fax: +39.06.57333612 www.dia.uniroma3.it/~didonato <http://www.dia.uniroma3.it/%7Edidonato> didonato(a)dia.uniroma3.it <mailto:didonato@dia.uniroma3.it>

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New on RIPE Labs: Amsterdam Power Outage as Seen by RIPE Atlas
by Vesna Manojlovic 31 Mar '15

31 Mar '15

Dear colleagues, As you might have heard, there was a power outage last week Friday in the north of The Netherlands, a country with a very high density of RIPE Atlas probes. This density provides us with some interesting data and visualisation. You can find more details on RIPE Labs: https://labs.ripe.net/Members/andreas_strikos/amsterdam-power-outage-as-see… Kind regards, Vesna

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probes on VMs
by Klaus Darilion 30 Mar '15

30 Mar '15

Hi! I just found an old thread about virtual probes: https://www.ripe.net/ripe/mail/archives/ripe-atlas/2013-June/000849.html I second the problems of virtual hosts and that the results may not as good as other probes result, but there is a big advantage for virtual probes - I can host them in the cloud. For example, I just wanted to debug routing issues from the Microsoft Cloud in Brazil to our server. Unfortunately there are no probes in this Cloud's AS. With a virtual probe it would be quite easy. I order an VM with Microsoft, and have my probe in the chosen datacenter. The probe could be tagged with "VM" to show that it is running on shared resources. Of course the VM will produce extra costs, but there may be sponsors, and the smallest VM is usually enough. For example , one possibility would be, that the sponsor donates the money, e.g. 10-20€ per month, and chooses the cloud location. RIPE will then rent the VMs and run the probes. With several sponsors we could get a nice cloud coverage, and we could deploy probes in networks where the provider does not want to hosts physical probes. regards Klaus

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NAT conntrack invalid ICMP(v4) type 11 code 0 packets dropped by edge router
by Gary Gapinski 30 Mar '15

30 Mar '15

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Create new measurement from old measurment
by Klaus Darilion 30 Mar '15

30 Mar '15

Hi! Is there a simple way in the webinterface to start a new measurement identical to an old one? (just duplicate them with new start-stop settings, in my case I want to duplicate one-off measurements) Thanks Klaus

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Short and immediate report from the RIPE Atlas hackathon
by Vesna Manojlovic 30 Mar '15

30 Mar '15

We had the first RIPE Atlas hackathon! Three days of intensive coding, cooperating, learning, connecting and having fun (& surviving massive power outage on Friday in Amsterdam) - - and the results have bee impressive! Ten final projects have been presented, and four have been chosen as worthy of the awards: 1. Disco: Combining the visalization of disconnection-events with localized Twitter feed & live weather data 2. Spatial Bucketing of RIPE Atlas Probes on Map Projections (aka Picketty — making the global probe selection more equal) 3. Traceroute stability check & BGP+traceroute (two projects sharing the 3rd place) We had 24 participants & 1 no-show, 6 jury members and 11 support staff (coincidentally: 42!) On behalf of the community, we are grateful to Comcast for sponsoring prizes and travel expenses, hackerspace Technologia Incognita for the inspiring location on Friday, and to RIPE NCC for the office facilities during the weekend, staff support, food & drinks & amazing data & tools & platform of RIPE Atlas. On behalf of the organizers (RIPE NCC & Comcast), we are grateful to everyone who took part & contributed, as well as to their family & employers, who let them get away for the weekend of combined work&fun. Longer and more detailed report will follow, once we all get some sleep & collect our notes from tweets, IRC, mailing list & pieces of papers. Cheers, Vesna

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What to do with RIPE Atlas probes that have only a ULA as IPv6 address?
by Philip Homburg 27 Mar '15

27 Mar '15

Dear community members, The RIPE Atlas team has a question what to do with probes that have only a Unique Local IPv6 Unicast Address (ULA) [RFC4193] as their IPv6 address. The question is whether to treat those probes as IPv6 capable or not. It is known that about 10% of the RIPE Atlas probes that have IPv6 addresses do not actually have IPv6 connectivity. This was documented by Stéphane Bortzmeyer in his RIPE Labs article "How Many RIPE Atlas Probes Believe They Have IPv6 (But Are Wrong)?" (https://labs.ripe.net/Members/stephane_bortzmeyer/how-many-atlas-probes-bel…) As a way of dealing with this problem, the RIPE Atlas system now tags probes that have broken IPv6. Any probe that has an IPv6 address (other than link local) but cannot reach the global internet is tagged as "IPv6 Doesn't Work" (see https://atlas.ripe.net/docs/probe-tags/) At the moment, around 2800 probes are connected and have an IPv6 address. Of those probes, around 350 (12.5%) are tagged that IPv6 doesn't work. Of those 350 probes, 114 have the surprising condition that the connect system call fails immediately with the error 'Network is unreachable.' Those 114 probes have two things in common, they have only a ULA address and the do not have a default route. It is the lack of default route that causes the connect system call to fail immediately. This feature (ULA and no default route) is specified in RFC-7084 (IPv6 CE Router Requirements) requirement ULA-5 ("An IPv6 CE router MUST NOT advertise itself as a default router with a Router Lifetime greater than zero whenever all of its configured and delegated prefixes are ULA prefixes.") The surprising thing is that for some probes this condition persists for many months. For the Atlas project, the question is how we should treat these probes. Currently they are regarded as having broken IPv6 connectivity. However, an alternative is to consider those probes as having no IPv6 at all. Broader questions are: are CPEs doing the right thing here. Should a CPE announce a ULA on the local LAN even if there hasn't been any IPv6 internet connectivity for a very long time? It is already complex enough for normal users to understand that there is always a link local IPv6 address even if there is no IPv6 connectivity. Now we have to add ULA to that group as well. So the question to the community, should RIPE Atlas treat ULAs in the same way as RFC-1918, addresses that should be ignored unless a valid global address can be found elsewhere. Or should we keep the current approach where ULAs are treated just like other global IPv6 addresses and consider the probe host's network setup to be broken? Philip

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