Hi, I don’t think mikrotik is RFC3021 compliant. So although you can beat a mikrotik into submission to get traffic to flow using a /31, I expect there are other bits to make it compliant that are missing. Not that I have actually read the RFC to know. Andrew From: Christopher Hawker <chris@thesysadmin.au> Sent: Monday, January 8, 2024 4:08 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Cc: Andrew Oakeley <andrew@oakeley.com.au> Subject: Re: [MT-AU Public] /31 Deployments for Point-to-Point links Hi Andrew, That's what I don't get - from a general technological perspective there's no reason why it shouldn't work. If anything, it's only giving me a reason to start steering away from Mikrotik for anything other than aggregation and end-user CPE. Regards, Christopher Hawker On Mon, 8 Jan 2024 at 18:43, Andrew Oakeley via Public <public@talk.mikrotik.com.au<mailto:public@talk.mikrotik.com.au>> wrote: Hi, Pretty sure I recall reading on the Mikrotik Forums where someone else was trying this and could not get a /31 to work with BGP on mikrotik. Andrew -----Original Message----- From: Public <public-bounces@talk.mikrotik.com.au<mailto:public-bounces@talk.mikrotik.com.au>> On Behalf Of Mike Everest via Public Sent: Monday, January 8, 2024 3:30 PM To: 'MikroTik Australia Public List' <public@talk.mikrotik.com.au<mailto:public@talk.mikrotik.com.au>> Cc: mike@duxtel.com<mailto:mike@duxtel.com> Subject: Re: [MT-AU Public] /31 Deployments for Point-to-Point links G'day! If the session doesn't establish, it won't have anything to do with the networks you are trying to advertise... Do routerOS logs give you any clues? If not, try adding bgp debug to system logging :) Cheers! Mike. ----Original Message----- From: Public <public-bounces@talk.mikrotik.com.au<mailto:public-bounces@talk.mikrotik.com.au>> On Behalf Of Christopher Hawker via Public Sent: Monday, 8 January 2024 5:33 PM To: public@talk.mikrotik.com.au<mailto:public@talk.mikrotik.com.au> Cc: Christopher Hawker <chris@thesysadmin.au<mailto:chris@thesysadmin.au>> Subject: [MT-AU Public] /31 Deployments for Point-to-Point links Hey all, Trying to stand-up a BGP session between a CCR2004-1G-12S+2XS and a CCR2004-16G-2S+ using a /31 for the link. I'm able to ping across the CCR2004-16G-2S+ link no problem, however, the BGP session doesn't establish. I'm attempting to move an existing session from a /30 where it works in order to conserve IP space. Is there some skullduggery going on, or is 7.13 just not RFC3021-compliant? Thanks, Christopher Hawker _______________________________________________ Public mailing list Public@talk.mikrotik.com.au<mailto:Public@talk.mikrotik.com.au> http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au<mailto:Public@talk.mikrotik.com.au> http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au<mailto:Public@talk.mikrotik.com.au> http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au