Strict vs. loose. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Mikael Abrahamsson" <swmike@swm.pp.se> To: "chris" <tknchris@gmail.com> Cc: "NANOG list" <nanog@nanog.org> Sent: Thursday, August 17, 2017 1:27:17 AM Subject: Re: Cogent BCP-38 On Thu, 17 Aug 2017, chris wrote:
Time for someone to bake them a bcp38 cake ....
I am all for people deploying BCP38, but from the original email this is definitely not a cause for celebration. BCP38 should be used against single homed customers only if you're doing it by using uRPF. Otherwise extreme care needs to be taken to make sure traffic isn't dropped because uRPF does the wrong thing (like it seems in this case). -- Mikael Abrahamsson email: swmike@swm.pp.se