[AusNOG] Filtering of downstream transit customer routes via RPF

[Mark Newton]

On 16 Jun 2015, at 5:35 pm, Andy Davidson <andy at nosignal.org> wrote:
> 
> Singled homed customers buying Internet Access circuits (no BGP) from you, on a single link, can and should be strict mode forwarded.  Thank you for doing that if you are. :-)

Unless your single homed customer who is buying internet access circuits (no BGP) from you, on a single link, happens to be receiving simplex downstream from someone else, and only wants to use you to provide the upstream.

Not as common these days, but those of us who remember Ku-band satellite internet access will have memories of horrifying outages caused by people turning on strict RPF without thinking about it first.  :-)

    - mark