Post At7azvbWSW0XkgDFjc by hikhvar@norden.social
 (DIR) More posts by hikhvar@norden.social
 (DIR) Post #At7XKtFrzMyUjLpCkK by benjojo@benjojo.co.uk
       2025-04-15T16:01:15Z
       
       1 likes, 2 repeats
       
       Hmm, Last night (Euro time) there was a huge flood of BGP updates into the internet, looking deeper it appears that CERNET3 went down and up for a moment.This would normally be a non issue, the BGP table sees a steady stream of updates per second of people mostly doing the same thing (your average full routing table has about 10 changes per second). Except CERNET3 is a bit weird. It has 4096 IPv6 /32's, and ASNs... CERNET3 calls this "slicing", and I've never really figured out what benifit this gives them to export 4096 prefixes, let alone 4096 ASNs.Anyway, whatever happened hit all of the "slices". Causing a huge flood of updates to flood around the internet.Not necessarily fatal (though this did cause a noticeable CPU spike, the only reason I noticed it), it does feel like poor behavior here to design a network where this impact is this visible from the outside!
       
 (DIR) Post #At7XKuJo2DiY1qfrWK by wolf480pl@mstdn.io
       2025-04-15T16:24:48Z
       
       0 likes, 0 repeats
       
       @benjojo this stuff?> The FITI backbone core nodes are located in 31 Chinese provincial-level regions [...] it supports 4,096 large-scale trial networks, achieving interconnection with domestic and international IPv4/IPv6 trial facilities, according to Xinhua.https://www.globaltimes.cn/page/202104/1221584.shtmlit sounds like some kind of testbed for testing how 4096 networks interact with each other... but then why'd they connect that to the internet?
       
 (DIR) Post #At7YLJfXsj00bfbM3c by wolf480pl@mstdn.io
       2025-04-15T16:36:07Z
       
       0 likes, 0 repeats
       
       @benjojo hmm starting on page 13, this seems to try to explain what CERNET's FITI is https://indico.cern.ch/event/1410638/contributions/6056869/attachments/2943647/5172414/Updates%20of%20CERNET%20and%20FITI-upload-version.pdfbut I couldn't make any sense of it
       
 (DIR) Post #At7azvbWSW0XkgDFjc by hikhvar@norden.social
       2025-04-15T17:05:49Z
       
       0 likes, 0 repeats
       
       @wolf480pl @benjojo looks like a very big testbed and research network like the DFN. With 4096 ASN you could handout one or more ASNs per research group and let them play with the real Internet.
       
 (DIR) Post #At7mYkO3FtU8aqiXTM by ignaloidas@not.acu.lt
       2025-04-15T19:15:21.600Z
       
       0 likes, 0 repeats
       
       @wolf480pl@mstdn.io @benjojo@benjojo.co.uk I can understand there being some value in having the ability to allow students to run "a real ASN" tbh, but 4k of giveout ASNs sounds like a bit too much