Public Graphana of transfer between NKN (India's NREN) and GEANT (essentially EU NREN backbone) https://public-brian.geant.org/d/ZyVgYFgVk/nkn?orgId=5&from=now-30d&to=now.
Transfer on both side usually seems to be averaging around 600 Mbps (lower than I expected).
From https://web.archive.org/web/20211010081515/https://www.geant.org/News_and_Events/Pages/New-NKN-international-network-to-boost-EU-India-collaboration.aspx published in 2016, NKN seems to have 2x10 Gbps capacity towards GEANT.
Data transfer graph between NKN (India's NREN) and LEARN (Sri Lanka's NREN) https://kirigal.learn.ac.lk/traffic/details.php?desc=slt-b1-new&data_id=1788&data_id_v6=&sub_bw=1000&name=National%20Knowledge%20Network%20of%20India%20(1G)&swap_inout=
1Gbit/s link.
Data transfer graph between NKN (India's NREN) and CERN (birthplace of www and operators of Large Hadron Collider) https://monit-grafana-open.cern.ch/d/XoND3VQ4k/nkn?orgId=16&from=now-24h&to=now&timezone=browser&var-source=raw&var-bin=5m
Transfer rates are almost same as between GEANT-NKN as essentially they're the same link. NKN/TIFR participate in LHCONE (India has two tier 2 sites) which carries LHC data over these links for scientific research purposes.
Latest LHCONE map from https://indico.cern.ch/event/772031/contributions/3442737/attachments/1853717/3047028/Interpreting_the_LHCONE_Map_LHCONE_Umea_Sweden_June_2019.v4.pdf (page 2).
NKN India (tier 2 site at VECC-SINP campus in Kolkata) and TIFR India connections can be seen on bottom left corner.
Connectivity diagram from VECC-SINP tier 2 site in Kolkata. Source https://indico.cern.ch/event/1411901/contributions/6017912/attachments/2919948/5125000/KolkataTier2_ATCFatTIFR2024.pdf.
Good details in the presentation. Also shows what other institutions are participating from IN.
Data transfer graph between NKN (India's NREN) and NORDUnet (NREN for Nordic countries) https://stats.nordu.net/stat-q/r-all?q=all&name=NKN. Low data transfer between the two though.
Peering seems to be via Netherlight (https://www.surf.nl/en/services/network-connectivity/netherlight) in Amsterdam from https://nordu.net/nkn-india-and-nordunet-set-direct-peering/ (2017).
Publicly Available NKN Data Traffic Graphs https://blog.sahilister.in/2026/02/publicly-available-nkn-data-traffic-graphs/
sahilister