Agreed. This is a problem, and it has happened before. This is not the first time. I asked Job Snijders (a maintainer of IRRExplorer) about it, and here's what he had to say. I don't think he should set an arbitrary threshold for excluding large prefixes from IRRExplorer. I think the prefix probably shouldn't be being advertised. But is there a technical distinction between this /3 and other advertisements aside from the size that could flag it for ignoring? ---------- Forwarded message --------- From: Job Snijders <job@instituut.net> Date: Fri, Oct 4, 2019 at 9:43 PM Subject: Re: IRR Eplorer weirdness 2000::/3 route? To: Billy Crook <BCrook@unrealservers.net> On Fri, Oct 04, 2019 at 12:25:27PM -0500, Billy Crook wrote:
I'm seeing that all of 2000::/3 is being advertised by 24785.
That can't be right, right? Maybe they're you're default upstream? I didn't see this route in sprint's v6 looking glass, so I'm assuming it's a local anomaly to your system.
Yeah, from time to time people (usually by accident) leak very large blocks to route collectors. Often these blocks exist internal in networks as a replacement for default routes and are not meant to leak to the wider world, but you know how things go. Here you can see the source of that data: http://lg.ring.nlnog.net/prefix_detail/lg01/ipv6?q=2000::/3 I could make irrexplorer ignore such large announcements, but where to draw the line? On Wed, Nov 13, 2019 at 1:00 PM Douglas Fischer <fischerdouglas@gmail.com> wrote:
I have been recommending to many friends to check in daily at http://irrexplorer.nlnog.net/ to make sure everything is healthy with their prefixes ...
Today a colleague reported a problem with an AS58299 ad appearing in "their prefixes". I went look and was showing up on our ASNs too.
It took me a while (dããã) to understand what was going on ... Why was irrexplorer showing that prefix in our query?
Could anyone reach somebody from OpenFactory/NetShelter/level66network about this?
http://lg.ring.nlnog.net/prefix_bgpmap/lg01/ipv6?q=2000::/3
2000::/3 [LEVEL66NETWORK1 11:35:27 from 2a09:11c0::1] * (100/-) [AS58299i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 209844 49697 58299 BGP.next_hop: 2a09:11c0::1 BGP.local_pref: 100 BGP.community: (49697,1000) (49697,1007) (49697,2302) BGP.ext_community: (RPKI Origin Validation State: not-found) BGP.large_community: (209844, 100, 13)
-- Douglas Fernando Fischer Engº de Controle e Automação