jm + via:irldexter   2

RIPE Atlas Probes
Interesting! We discussed similar ideas in $prevjob, good to see one hitting production globally.
RIPE Atlas probes form the backbone of the RIPE Atlas infrastructure. Volunteers all over the world host these small hardware devices that actively measure Internet connectivity through ping, traceroute, DNS, SSL/TLS, NTP and HTTP measurements. This data is collected and aggregated by the RIPE NCC, which makes the data publicly available. Network operators, engineers, researchers and even home users have used this data for a wide range of purposes, from investigating network outages to DNS anycasting to testing IPv6 connectivity.

Anyone can apply to host a RIPE Atlas probe. If your application is successful (based on your location), we will ship you a probe free of charge. Hosts simply need to plug their probe into their home (or other) network.

Probes are USB-powered and are connected to an Ethernet port on the host’s router or switch. They then automatically and continuously perform active measurements about the Internet’s connectivity, and this data is sent to the RIPE NCC, where it is aggregated and made publicly available. We also use this data to create several Internet maps and data visualisations. [....]

The hardware of the first and second generation probes is a Lantronix XPort Pro module with custom powering and housing built around it. The third generation probe is a modified TP-Link wireless router (model TL-MR 3020) with a small USB thumb drive in it, but this probe does not support WiFi.

(via irldexter)
via:irldexter  ripe  ncc  probing  active-monitoring  networking  ping  traceroute  dns  testing  http  ipv6  anycast  hardware  devices  isps 
29 days ago by jm
'Jupiter rising: A decade of Clos topologies and centralized control in Google’s datacenter networks'
Love the 'decade of' dig at FB and Amazon -- 'we were doing it first' ;)

Great details on how Google have built out and improved their DC networking. Includes a hint that they now use DCTCP (datacenter-optimized TCP congestion control) on their internal hosts....
datacenter  google  presentation  networks  networking  via:irldexter  ops  sre  clos-networks  fabrics  switching  history  datacenters 
october 2016 by jm

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