Hi. if you're a customer, using only my PA space, and multihomed: I'll do BGP with you -- you can be AS64512. I'll do strict uRPF with a fail-filter allowing all my PA space sourced by you. Is there a problem with that? Frank On 12/4/2025 7:23 AM, C. Jon Larsen via NANOG wrote:
strict urpf should only ever be enabled by providers when PA space is assigned, and typically thats on a static routed assignment, never a bgp session and typically never on a bgp session / peer with a customer that is multihomed, etc.
In other words I would tend to say Im not going to ever buy transit from you if you run strict uRPF on my ports.
+ Jon Larsen: CTO Richweb, Inc. + Richweb.com: Cloud/Route/Switch/MSP Experts since 1995 + GnuPG Public Key: http://jlarsen.richweb.com/jlarsen.gpg + Business: (804) 368-0421 x 101; Mobile: (804) 747-8592
_______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/ nanog@lists.nanog.org/message/HOLPB2PBSMHY57IQP6WGEVVYTNXVOFXU/