- ripe-atlas - mailman.ripe.net

New on RIPE Labs: There Is Gold in This Stream - Sifting Through Used RIPE Atlas Traceroute Results
by Mirjam Kühne 20 May '16

20 May '16

Dear colleagues, Please find a new article on RIPE Labs demonstrating the value of the results collected by RIPE Atlas independent of the original purpose for collecting them. Using all traceroute results from a particular day as an example, we first show that near real-time analysis of the result stream is feasible. Then we show that this has great potential for studying the packet layer of the Internet in general and for providing tools to network operators in particular. All this suggests a large and diverse potential for further work. https://labs.ripe.net/Members/dfk/there-is-gold-in-this-stream?pk_campaign=… Kind regards, Mirjam Kuehne RIPE NCC Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum

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Replacing flash key
by Marat Khalili 20 May '16

20 May '16

My V3 probe (26656) disconnected yesterday, simple reboots didn't help. Suspecting problem with USB key I first tried to replace it with a new one. I took bog standard Transcend JetFlash 350 8Gb right out of the wrapping and inserted it into a started probe 10 minutes after boot. Did not format the flash key or alter it in any way, because someone previously said that it is not necessary. Unfortunately, probe did not come up, and the flash key seems unchanged after approximately 1 hour wait. What should I do to switch to a new flash key? Also, did someone tried connecting HDDs/SSDs, shouldn't they work better? (Probe did appear after I inserted previously used flash key into it, but I suspect problem will re-occur in the future, so I'd like to know a way to fix it more permanently.) -- With Best Regards, Marat Khalili

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evaluating ripe atlas
by Rafal.Jankowski＠thomsonreuters.com 19 May '16

19 May '16

Dear Ripe Atlas Users, I would like to evaluate ripe atlas features. Is there any quick and simple way to earn credits? From what I can see becoming sponsorship begins from 1000 EUR which is above my budget for evaluating the tool. Hosting probe is not something feasible for me at the moment. Is there any option to buy credits for something like 100 EUR? Also I wanted to see webinar recording https://www.youtube.com/watch?v=oJMFGuM0kMo linked on https://atlas.ripe.net/resources/training-and-materials/ but it seems to be unavailable. Regards, Rafał ________________________________ This e-mail is for the sole use of the intended recipient and contains information that may be privileged and/or confidential. If you are not an intended recipient, please notify the sender by return e-mail and delete this e-mail and any attachments. Certain required legal entity disclosures can be accessed on our website.<http://site.thomsonreuters.com/site/disclosures/>

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probe coverage map?
by Bajpai, Vaibhav 18 May '16

18 May '16

Hello, What happened to the probe coverage map that showed number of probes at different level of details depending on the zoomed-in state of the map? — I have an earlier screenshot [a] (2015) to explain what I mean. It was a very nice plot. [a] http://i.imgur.com/d0tI1qP.png I was looking for a probe coverage map to put in one of my slides. I ended up using [b], but I miss [a]. [b] https://www-static.ripe.net/static/rnd-ui/atlas/static/page/img/allprobes.p… Best, Vaibhav =================================== Vaibhav Bajpai www.vaibhavbajpai.com Room 91, Research I School of Engineering and Sciences Jacobs University Bremen, Germany ===================================

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New on RIPE Labs: Pinpointing Delay and Forwarding Anomalies using RIPE Atlas Built-in Measurements
by Mirjam Kuehne 18 May '16

18 May '16

Dear colleagues, Detecting network disruptions is a recurring problem. Clearly locating performance degradation is an important step in debugging and subsequently fixing connectivity issues. In this new RIPE Labs article the authors propose a set of complementary methods to detect network disruptions from traceroute measurements created by RIPE Atlas Built-In Measurements: https://labs.ripe.net/Members/romain_fontugne/pinpointing-delay-and-forward… Kind regards, Mirjam Kuehne RIPE NCC

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Adding additional probes to existing measurement or exchange them
by Annika Wickert 18 May '16

18 May '16

Hi everybody, I just stumbled across this problem, that I want to exchange probes on a actual running measurement because some of the probes I defined 2weeks ago went offline. And I want other probes to take over their job. Is that possible in any way? Cheers, Annika Wickert

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USB drive
by Michael Ionescu 13 May '16

13 May '16

Hi all, I have a probe that's been down for several days now. I did contact RIPE about it, but support has been superficial. I also didn't yet find the level of technical detail I need in the information on the website and in this list's archives. The 8GB drive, when reformatted on a windows box with FAT32 as per support instructions, surprisingly only comes out with a 1GB partition. Inspecting the drive under linux, I find multiple partitions, with only the first containing an a fat32 filesystem: Platte /dev/sdc: 7927 MByte, 7927234560 Byte 244 Köpfe, 62 Sektoren/Spur, 1023 Zylinder, zusammen 15482880 Sektoren Einheiten = Sektoren von 1 × 512 = 512 Bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Festplattenidentifikation: 0xc3072e18 Gerät boot. Anfang Ende Blöcke Id System /dev/sdc1 2048 2099199 1048576 b W95 FAT32 /dev/sdc2 2099200 4196351 1048576 83 Linux /dev/sdc3 4196352 6293503 1048576 83 Linux On first glance, the others contain ext2 filesystems # fsck -N /dev/sdc? fsck von util-linux 2.20.1 [/sbin/fsck.vfat (1) -- /dev/sdc1] fsck.vfat /dev/sdc1 [/sbin/fsck.ext2 (2) -- /dev/sdc2] fsck.ext2 /dev/sdc2 [/sbin/fsck.ext2 (3) -- /dev/sdc3] fsck.ext2 /dev/sdc3 but on further inspections do not contain a valid magic number in their superblocks, so they are effectively unformatted. I would therefore suspect that they are not being used by the probe. Now the question: What is the correct layout supposed to look like (primary/secondary, size, ID, FS-type)? I would like to get my probe back up and running. Bonus question: What can I expect to find in point of files/data on the drive, that would tell me whether the probe was working correctly until I cut power and removed the drive? Thanks, Michael

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[dagstuhl seminar]: global measurements: practice and experience
by Bajpai, Vaibhav 12 May '16

12 May '16

Dear RIPE Atlas / MAT WG -- sorry for cross-posting. A SIGCOMM CCR article summarising the Dagstuhl seminar on ‘Global Measurements: Practice and Experience’ just came online [a]. Thought to share it with you: [a] http://www.sigcomm.org/sites/default/files/ccr/papers/2016/April/0000000-00… Background: ===================== We recently helped organise a Dagstuhl seminar on Global Measurements: Practice and Experience [b] from January 04 – 07, 2016. This was a followup of the seminar on Global Measurement Framework [c] which focused on the development of global Internet measurement platforms and associated metrics. [b] http://www.dagstuhl.de/16012 [c] http://www.dagstuhl.de/13472 The second seminar aimed at discussing the practical experience gained with building global measurement platforms. It brought together people who are actively involved in the design and maintenance of global measurement systems, who do research on the data delivered by global measurement systems, and who use data derived from global measurement systems in order to manage networks or services or as input for regulatory decisions. ===================== Best, Vaibhav =================================== Vaibhav Bajpai www.vaibhavbajpai.com Room 91, Research I School of Engineering and Sciences Jacobs University Bremen, Germany ===================================

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Number of probes
by Marc Sanchez 11 May '16

11 May '16

I'm new in RIPE and I don't know it enough deeper. I need to check the state of several networks and I'm wondering how many probes should I need to measure a ping between two ASN. Could be enough using just one probe for each measurement? Sorry for the inconvenience. Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum

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probe congestion?
by Paul Vlaar 11 May '16

11 May '16

Hi all, while running a DNS UDM on a fixed set of (reused from a previous UDM) probes, I noticed the following. When I start 6 UDMs against the same set using the web UI, as a one-off measurement, starting "now", the RTTs for all of the measurements shoots up on all of the probes (500-1000+ ms). When I start the 6 tests individually, the RTTs are much lower, and close to what I'd expect them to be. It appears to me that when multiple UDMs are scheduled on the same probe, these should be run in serial, not parallel, in order to not run into congestion issues. Or am I simply expecting the wrong behaviour, and should I not schedule one-off measurements in parallel in the first place? ~paul

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SixXS issues
by Alison Wheeler 11 May '16

11 May '16

I received my second probe* yesterday (different ASNs) and it is connects via SixXS for IPv6 as the ISP isn't supplying native v6 (despite repeatedly asking when they will catch up on something around for twenty years!). It booted fine and the appear no issues with the IPv4 connectivity but the v6 is going up and down every few minutes (for around the same period.) Not finding anything relevant after searching the forum (nor on google) I'm trying to discover why this might be. My other machines are not experiencing any difficulty with v6 connectivity and the probe is connected to the same 16-port switch as everything else. Suggestions of what to investigate next very welcome! * https://atlas.ripe.net/probes/28800/ Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum

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New on RIPE Labs: Using RIPE Atlas to Debug Network Connectivity Problems
by Mirjam Kuehne 10 May '16

10 May '16

Dear colleagues, Please find this new article by Stéphane Bortzmeyer on RIPE Labs where he explains how he used RIPE Atlas probes, the official RIP Atlas API and custom scripts, to debug network issues: https://labs.ripe.net/Members/stephane_bortzmeyer/using-ripe-atlas-to-debug… Kind regards, Mirjam Kuehne RIPE NCC

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LatencyMON Widget Y axis in milliseconds
by Marat Khalili 10 May '16

10 May '16

I'm using LatencyMON <https://atlas.ripe.net/docs/tools-latencymon/> widget to monitor my network performance. It's very convenient. Unfortunately, it always loads with latency shown in %% (of what?), not in milliseconds, so I have to make one extra click in order to view actual milliseconds. Is there some hidden switch that would make milliseconds the default? Shouldn't it be initially default in the first place? -- With Best Regards, Marat Khalili

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ping measurements and high lts
by Clinton Work 10 May '16

10 May '16

When looking at the ping measurement json results I found some probes are reporting a very high lts (last time synchronized). Is it normal for very high lts values to be reported? These two anchors seem chronic: Probe 6161, max lts 65807 Probe 6132, max lts 23905 ================================= Clinton Work

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UDP Traceroute port?
by Laura M. Roberts 06 May '16

06 May '16

Hello, What port is used when a UDP traceroute is performed, please? Thank you, Laura

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Re: [atlas] DNS entry
by Anthony 02 May '16

02 May '16

Okay thank you for the answer. Should he therefore leave the "OFF"? Le 02/05/2016 17:01, Micha Bailey a écrit : > Essentially, this is a dynamic DNS service bound to the probe. If you > choose "simple" the hostname will be something like > p#####.probes.atlas.ripe.net <http://probes.atlas.ripe.net>, with the > probe number. If you choose "obfuscated", the hostname will be > something else. I don't know exactly what it looks like, but it's > something less identifying. > > On Monday, May 2, 2016, Anthony <contact.anthoo(a)gmail.com > <mailto:contact.anthoo@gmail.com>> wrote: > > Hello, > > In the edition of general probe of my information, I see that > there are marked "DNS" with several choices: OFF, SINPLE or > obfuscated. > > I would have wanted to know what it matched? And what he had to > choose. > > Thank you in advance. >

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DNS entry
by Anthony 02 May '16

02 May '16

Hello, In the edition of general probe of my information, I see that there are marked "DNS" with several choices: OFF, SINPLE or obfuscated. I would have wanted to know what it matched? And what he had to choose. Thank you in advance.

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An article/FAQ entry about probe troubleshooting
by Ondřej Caletka 02 May '16

02 May '16

Hi all, it seems that failing probes are getting more and more to be an issue, possibly due to USB flash drive failure. I think it would be nice if there was an article / FAQ entry with some official troubleshooting procedures, so we could just send a link to anybody complaining about non functional probe. Is there something like this on the roadmap? Perhaps we as the community could make something up: - how to check whether the port probe is connected to has proper IP and DNS parameters and is allowed to establish a SSH session to TCP port 443 in the Internet (beware of DPI firewalls that allow HTTPS but not SSH over 443) - how to check the LED status and the SOS list at the probe page (the current LED explanation in the FAQ is too techy and even power users like me still don't understand all presented states :) ) - how to diagnose USB flash drive failure, how to force reformatting the flash drive and how to replace it with a new one What do you think? Cheers, Ondřej Caletka CESNET

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Atlas probe down and probe replacement
by Vladimir-M. Obelic 01 May '16

01 May '16

After a power outage i'm not getting the probe up. It's not even trying DHCP. What is the procedure for a probe replacement? Thanks Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum

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New on RIPE Labs: How Elasticsearch and Kibana Help us Analyse RIPE Atlas Data Logs
by Mirjam Kuehne 29 Apr '16

29 Apr '16

Dear colleagues, RIPE Atlas backend applications run on more than 40 servers. Each day these machines can produce thousands of application logs of any kind of severity level. In order to be able to track down serious errors, warnings or even unusual behaviour, we decided some time ago to try Elasticsearch as a logging sink. In this article we will look at the design of such a system and describe how we can easily make sense from an ocean of logs: https://labs.ripe.net/Members/andreas_strikos/how-elasticsearch-and-kibana-… Kind regards, Mirjam Kuehne RIPE NCC

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Failure Rate on Atlas Probes
by Jonathan Brewer 23 Apr '16

23 Apr '16

Hi All, What's the known failure rate of Atlas probes, and the mean time before failure? At a guess 20% or more of the probes I've been working with have failed within their first year of deployment. Sometimes they come back with a power cycle, sometimes they don't. Regards, Jon

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Probe not received
by rgnr＠riseup.net 22 Apr '16

22 Apr '16

Hey, as the subject says. It's been 4 weeks now and nothing has arrived. Any clues what to do? regards Bernd

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Led WPS / RESET
by Anthony 22 Apr '16

22 Apr '16

Hello everyone, I had a power outage, so I had to reboot my box and my probe, but now the LED button "WPS / RESET" lights is this normal? Before it off extinct. thank you in advance

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New on RIPE Labs: Looking at IXPs in Berlin with RIPE Atlas
by Vesna Manojlovic 21 Apr '16

21 Apr '16

Dear colleagues, The IXP country jedi tool described in earlier RIPE Labs articles, can now also be used to analyse the situation in a specific city. This time we look at Berlin, Germany: https://labs.ripe.net/Members/mirjam/using-ripe-atlas-to-look-at-ixps-in-be… Regards, Vesna

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Probe status / self-help
by Robert Kisteleki 20 Apr '16

20 Apr '16

Dear All, Today we released a new feature intended to help the probe hosts detecting, understanding and fixing various issued related to probes. You should be able to see a new "Status" tab on your probe page. This is where we explain various conditions, such as USB problems, non-working IPv6 or DNS resolutions quirks. Please note that this bit is in early stages (officially labeled as beta). We believe it works in general, however for now it only explains various system tags that mark error conditions. It will have more features in the future. It is also intended to be a place where we can add features that explain, for example, "your probe behaves differently than the rest" or "path MTU issues detected" or such. We think this will be a useful feature to hosts. Let us know if you have specific suggestions for improvement. Regards, Robert Kisteleki RIPE NCC

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