Have you received a response from qrator? My guess is that they dropped a BGP collector session that was advertising garbage (modifying AS path to make non-connected ASNs appear connected).
>most ASNs left permanently on at 2017-03-11 21:00:00 were never connected https://radar.qrator.net/as11537/peerings#startDate=2017-03-06&endDate=2017-03-15&tab=left Yang On Tue, Dec 5, 2017 at 6:06 PM, Mike Hammett <[email protected]> wrote: > Does anyone use this site much? Has something happened to reduce their > visibility? > > I've noticed multiple networks that had massive drops in peerings on or > around March 11, 2017. AS5650 went from 66 to 12. AS53828 went from 436 to > 19. PCH's AS3856 looking glass still reports adjacencies to both of those > ASes. AS3856 went from 183 adjacencies to 113 that same day (and didn't > bounce back). It seems rather unlikely that PCH would lose that much, given > that their goal is to collect route table information. Even more odd that > those two ASNs would also lose a ton of peers the same day. > > Thoughts? > > > > > ----- > Mike Hammett > Intelligent Computing Solutions > > Midwest Internet Exchange > > The Brothers WISP >
