- ripe-atlas - mailman.ripe.net

NSID option on the RIPE Atlas SOA measurements of the root servers
by Chris Amin 20 Jul '17

20 Jul '17

Dear colleagues, RIPE Atlas is currently running a series of DNS SOA built-in measurements* towards all of the root servers from all probes. During the recent DNS measurements hackathon** it became apparent that for some use cases it would be useful to have SOA queries from all probes with the NSID EDNS option set, in order to be able to match up responses with the particular responding instances in an anycasted (or load balanced) setup. We would like to ask for feedback on two alternative options for implementing this change. They are: 1) Enable the NSID option for the existing built-in measurements towards the nine root servers which support it. 2) Start a new set of built-in measurements towards the nine root servers which support NSID. The advantages of option (1) are that it will be possible to compare and contrast the two sets of results, and that historical data for the existing built-ins will remain consistent with the current results. A very simple analysis shows that there is no overall increase in query error rates through enabling NSID, but there are bound to be individual marginal cases where queries fail or produce different results with NSID set but succeed without it. The advantages of option (2) are that there will be no increase in result storage usage -- the current IPv4+IPv6 UDP SOA built-ins towards the nine supporting root servers adds up to about 80 results per second (~1.5% of the total results in the system). This could potentially be mitigated by reducing the frequency for these new measurements, but perhaps more important than the slightly increased load is the potential user confusion caused by generating and providing two very similar sets of measurements. Please let us know if you have any preference for which way we go on this, particularly if you have a (current or future) use case for this kind of data. Kind regards, Chris Amin RIPE NCC * https://atlas.ripe.net/docs/built-in/ ** https://labs.ripe.net/Members/becha/results-dns-measurements-hackathon

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Update on the anchoring measurements change
by Johan ter Beest 20 Jul '17

20 Jul '17

Dear all, As described in the labs article here: https://labs.ripe.net/Members/alun_davies/balancing-act we have split the anchoring measurements. We are currently in the process of adding more probes to the new 'probe' anchoring measurements. We expect this to be completed by the end of this week. Please let us know if you notice anything out of the ordinary. Kind regards, Johan ter Beest RIPE Atlas Team

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Link aggregation for anchors?
by Tore Anderson 20 Jul '17

20 Jul '17

Hi, I was wondering if it is possible to connect our anchor in a fault tolerant fashion using 802.3ad link aggregation? This would allow us to perform serialised maintenance on the upstream switches without ever offlining the anchor. Tore

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Trace and Ping measurements fail on Probe 15861
by ripe＠brite.cz 18 Jul '17

18 Jul '17

Hi team, recently I'm not able to run measurements on probe 15861 I am hosting at home. When I create a measurement with only this probe, it ends up in Failed status [measurements 9193416 9193417 9199824 for example]. When there is multiple probes in the measurement, probe 15861 ends up showing "No recent report available" [9193406 9192883]. Otherwise the probe has been online and does not show any anomalies. Any idea? Thank you Jiri

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New RIPE Atlas Measurement Options
by Alun Davies 17 Jul '17

17 Jul '17

Dear all, The RIPE Atlas team have added a number of new measurement options on RIPE Atlas. Here’s an overview of the changes: DNS measurements timeout: allows the user to specify a custom timeout in milliseconds after which probes will stop waiting for a response from the DNS server use_macros: allows the use of special macro strings in the "query_argument" field, to create unique or easily distinguishable queries. The allowed macros are: $p the (integer) ID of the probe carrying out the measurement $r a random 16-digit hexadecimal string $t a Unix timestamp of the time that the probe carries out the DNS query SSLcert measurements hostname: specifies a hostname to send as a Server Name Indication (SNI), which is necessary for web servers which host multiple TLS domains on the same IP address. Ping measurements include_probe_id: include the probe ID as an ASCII string within the payload of ping measurements. Note: this is included in addition to other payload data. The changes are all included in the RIPE Atlas API reference: https://atlas.ripe.net/docs/api/v2/reference/#!/measurements/Measurement_Li… <https://atlas.ripe.net/docs/api/v2/reference/#!/measurements/Measurement_Li…> If you have any questions whatsoever about the new measurement options, do let us know. As always, we welcome suggestions for new features from RIPE Atlas users. Best regards, Alun Davies RIPE NCC Communications Department

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Caching issues on the latest call
by Johan ter Beest 13 Jul '17

13 Jul '17

Dear all, Today we became aware of some caching issues on the latest API call (https://atlas.ripe.net/docs/api/v2/reference/#!/measurements/Latest_GET). In certain corner cases it was possible that an incomplete set of results for a logged-in user was cached for up to 24 hours. This did not apply to non logged-in users as the results are not cached in that case. A fix for this issue has been deployed and going forward the latest call will have a 1 minute cache regardless of whether the user is logged in or not. As caching is always tricky, we kindly ask that users will let us know if they experience anything out of the ordinary that might be related to this change. Kind regards, Johan ter Beest RIPE Atlas Team

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half dead v1 probe ?
by Matthieu Herrb 13 Jul '17

13 Jul '17

Hi, Here at Tetaneutral.net we're hosting a V1 Atlas probe since 2012 or so. A few weeks ago it started beeing marked as unconnected on the ripe atlas page : https://atlas.ripe.net/probes/523/ Since it's a v1 probe, I can only power cycle it to try to reconnect it, which I've done a number of times now, without success. It's still answering to ping requests, both on its v4 and v6 addresses and I can see some traceroute-like trafic going out of it. It's marked as "firewall problems suspected", but we don't do any firewalling on it. On IPv4 it's on a 1:1 NAT, all ports are open and forwarded in both directions, and on V6 it's routed without any filtering. Also we haven't changed anything on our infrastructure around the time it became disconnected. I'm starting to suspect a firmware upgrade problem as the one mentionned by Alun Davis in https://www.ripe.net/ripe/mail/archives/ripe-atlas/2017-June/003329.html Any suggestion before I send it back and ask for a new one ? Thanks in advance, -- Matthieu Herrb

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Probe does not request IPv4 address via DHCP
by Stanish Stanishev 11 Jul '17

11 Jul '17

Hello, My probe(ID 16372) has disconnected from the Atlas network and in the Status I see USB flash corrupted. I did the troubleshooting - power off the probe, remove the USB, power on the probe, waited 10 mins, plugged brand new 4G USB. Several times with no success, So I decided to do a traffic capture of the uplink port where the probe is connected to. According to the capture the probe does not send DHCP requests. It sends only IPv6 traffic - Multicast Listener reports and Neighbor solicitation. Hence not getting IP address. I did several restarts - no change. Anybody has seen this issue before ? Any hints how to deal with such issue ? Thanks Stanish Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum

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New on RIPE Labs: Anchoring Measurements - Bringing Back the Balance
by Mirjam Kuehne 06 Jul '17

06 Jul '17

Dear colleagues, Please read on RIPE Labs how we're striking a balance between probes and anchors in RIPE Atlas anchoring measurements: https://labs.ripe.net/Members/alun_davies/balancing-act Kind regards, Mirjam Kühne RIPE NCC

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[ripe-atlas-tools] Anyone had success with renderer aggregate_ping?
by Stephane Bortzmeyer 05 Jul '17

05 Jul '17

I cannot make the renderer aggregate_ping work: https://github.com/RIPE-NCC/ripe-atlas-tools/issues/186

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