nanog mailing list archives
Re: BGP prefix filter list
From: Karsten Elfenbein <karsten.elfenbein () gmail com>
Date: Wed, 15 May 2019 18:23:26 +0200
Hi, did you find https://labs.ripe.net/Members/emileaben/768k-day-will-it-happen-did-it-happen ? It has further links at the end as well. If you hit the 768k issue for IPv4 you might look at IPv6 as well as there might be a 64k limit on some tcam profiles. If there is no IPv6 in use (very sad face) there might be the option to switch to a 1m IPv4 route profile. Using a default route might influence Reverse Path Forwarding on the device. But you can apply outbound ACL on upstream ports as well. The weekly routing table report has lists of worst offenders when it comes to de aggregation or https://www.cidr-report.org/as2.0/ Karsten Am Mi., 15. Mai 2019 um 13:45 Uhr schrieb Baldur Norddahl <baldur.norddahl () gmail com>:
Hello This morning we apparently had a problem with our routers not handling the full table. So I am looking into culling the least useful prefixes from our tables. I can hardly be the first one to take on that kind of project, and I am wondering if there is a ready made prefix list or similar? Or maybe we have a list of worst offenders? I am looking for ASN that announces a lot of unnecessary /24 prefixes and which happens to be far away from us? I would filter those to something like /20 and then just have a default route to catch all. Thanks, Baldur
Current thread:
- Re: BGP prefix filter list, (continued)
- Re: BGP prefix filter list Hansen, Christoffer (May 15)
- Re: BGP prefix filter list Brielle Bruns (May 15)
- Re: BGP prefix filter list Ross Tajvar (May 15)
- Re: BGP prefix filter list Baldur Norddahl (May 15)
- Re: BGP prefix filter list mike . lyon (May 15)
- Re: BGP prefix filter list Baldur Norddahl (May 15)
- Re: BGP prefix filter list Mike Hammett (May 15)
- Re: BGP prefix filter list Ahad Aboss (May 16)
- Re: BGP prefix filter list Karsten Elfenbein (May 17)
- Re: BGP prefix filter list Amir Herzberg (May 18)
- Re: BGP prefix filter list Alejandro Acosta (May 18)
- Re: BGP prefix filter list Blake Hudson (May 20)
- RE: BGP prefix filter list adamv0025 (May 22)
- Re: BGP prefix filter list Blake Hudson (May 22)
- Re: BGP prefix filter list Jörg Kost (May 17)