Re: What's going on with AS147028?

uly 16, 2022 3:50 PM To: nanog@nanog.org Cc: n...@he.net Subject: Re: What's going on with AS147028? I think one of the reason is LL-IX strips their own ASN (59947) from the path and feed it to the route server. I see it as junk routes, and lots of people forgot(or intentionally not) to add 59

Re: What's going on with AS147028?

I think one of the reason is LL-IX strips their own ASN (59947) from the path and feed it to the route server. I see it as junk routes, and lots of people forgot(or intentionally not) to add 59947 back. I scanned all LLIX members this morning(h

Re: What's going on with AS147028?

I run bgp.tools (with it's own route collectors, that people should totally feed :) https://bgp.tools/kb/setup-sessions ) but I feel like I can add some insight here to what I think is happening with AS147028. I've had multiple issues with networks feeding me that also are on LL-IX (https://www.pe

Re: What's going on with AS147028?

No reason to feed fake routes to route collectors. Some BGP players (ASN Operator) like that, and make the AS number one in stats. [image: image.png] Maybe someone knows bgp.tools, they also run route collectors but rejected AS Number which joined LL-IX . (This

Re: What's going on with AS147028?

Just to name few others with the same issue. AS140731 AS141011 AS141237 Best regards August Yang > On Jul 12, 2022, at 6:20 PM, Mike Leber via NANOG wrote: > > This kind of thing is a problem from time to time with the data we get from > route collectors. > > When we see it we have to add the

Re: What's going on with AS147028?

This kind of thing is a problem from time to time with the data we get from route collectors. When we see it we have to add the culprit ASN to a filter list we keep in bgp.he.net. It tends to be a repeat problem with some collectors and some ASNs. We haven't really figured out why people sen

Re: What's going on with AS147028?

Indeed the network feeds some of the major route collectors. One known cause is LL-IX which operates in a topology that partially transits routes from physical exchanges to its participants and strips their ASN in path. > Possibility to peer with a large number o