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Espresso: Google's peering edge architecture

Anurag Bhatia
Back in 2017 Google shared details about Espresso which is their SDN solution for scaling up their routing. Saw this fascinating presentation from Google at SIGCOMM 2017. This blog post covers it in detail besides the talk. Key design principles for their routing platform Hierarchical control plane consisting of both global as well as local control. Global takes care of overall traffic flow, inputs coming from performance metric etc while local take care of failure of BGP sessions, port/device failure etc.

Railtel-Google free railway station wifi using 49Gbps!

Anurag Bhatia
Railtel (the telecom arm of Indian railways) is running free wifi hotspots across the country in collaboration with Google. It’s there since last two years and started with the MoU between Railtel and Google (news here) back in 2015. Fast forward to 2018 - the free wifi project railway stations seems to be doing quite well with so many users using it. The project covers 361 stations and is expected to reach it’s target of 400 stations soon.

Amazon India peering check

Anurag Bhatia
And here goes first blog post of 2018. Last few months went busy with some major changes in personal life. :) I looked into Amazon’s India connectivity with various ASNs tonight. Here’s how it looks like. (Note: Jump to bottom most to skip traces and look at the summary data). Traceroutes Amazon India to Vodafone India traceroute to 118.185.107.1 (118.185.107.1), 30 hops max, 60 byte packets 1 ec2-52-66-0-128.ap-south-1.compute.amazonaws.com (52.66.0.128) 21.861 ms ec2-52-66-0-134.

DNS hack of Google, Facebook more sites in .bd

Anurag Bhatia
Yesterday Google’s Bangladeshi website google.com.bd was hacked and this happened via DNS. It was reported on the bdNOG mailing list at morning in a thread started by Mr Omar Ali. This clearly shows how authoritative DNS for “com.bd.” (which is same as bd. btw) was poisoned and was reflecting attackers authoritative DNS. Later Mr Farhad Ahmed posted a screenshot of google.com.bd showing hackers page: Later Mr Sumon Ahmed mentioned that it happened because web frontend of .

Should Google pay to Airtel for data interconnection charges?

Anurag Bhatia
Yesterday I had a discussion with a friend from Airtel after long time. For some strange reason discussion topic was changed to old statements from Bharti Airtel’s executives that companies like Google, Facebook, Yahoo etc should pay to ISPs like Airtel for “data interconnection”. The argument goes more for Google then any other company. Statements from Airtel can be found here and here. The argument? Companies like Airtel who have built a “physical infrastructure” feel that companies like Google should pay to them since they are putting so much of traffic on their networks.