We did similar at a previous gig, though the switches did not support BGP unnumbered so there was an initial DHCP bootstrap to hit a couple of microservices to retrieve identity info (upsert local server's ASN; retrieve switch peer ASNs), but then turned up peering and off you go.
But I digress: It would be fantastic if BIRD could support interface-specified unnumbered BGP over IPv6 LL with an RA bootstrap and 5549-based 4-over-6. On Thu, Jul 14, 2022 at 2:42 PM Douglas Fischer <[email protected]> wrote: > This thread reminded me of something I saw these days about using BGP > unnumbered in Hypervisors for EVPN/VXLAN. > > I confess that I was completely stunned to see how beautiful it was! > > - The 4 ports of each Server became a CLOS L3 topology. > - The complexities of Multichassis-LAG no longer exist. > - The establishment of neighborhoods was almost automatic. > - And the ToR switches became only simple L3 routers, without even knowing > of the existence of Overlay. Which made them much cheaper and simpler to > operate. > > Em qui., 14 de jul. de 2022 às 12:40, Marco d'Itri <[email protected]> escreveu: > >> On Jul 14, Ondrej Zajicek <[email protected]> wrote: >> >> > > RFC 8950 is what has been implemented in Cumulus. >> > Not sure how that is relevant, RFC 8950 is just IPv6 next hop for IPv4 >> > routes, it does not handle BGP neighbor discovery. >> Discovery is just looking at Router Advertisements for the link, then >> you need RFC 8950. >> >> >> https://www.theasciiconstruct.com/post/cumulus-basics-part-v-bgp-unnumbered/ >> <https://isolate-menlo.menlosecurity.com/0/eJwNzDkOhDAMAMC_uMZYFDT5TWIiiEQO-SDFav8O84D5gcsNAS6zoYFozrnalaNyKdybmjjbyr3S6GrEXv12xRS1sOKIYvhgOgd6a15TlnwQLCAdwraAleO7tx3-L-LkJKs> >> >> https://www.theasciiconstruct.com/post/junos-bgp-and-bgp-unnumbered/#bgp-unnumbered-bgp-auto-discovered-neighbors >> <https://isolate-menlo.menlosecurity.com/0/eJxVjrsOgzAMRf_FXQkRQ5f8DXmIGIEdxXYzVP13Kjp1ujpHZ7hvsH5AgKraJHg_xpi1llUSYmIS7ZZ0Tnz6xqJ-N2JxcWtupXyvEdkZSy_ZP_75l5myyyiJX7ejgluN3AUm6AxhmUAxfw8sT_hciJ4ytg> >> >> -- >> ciao, >> Marco >> > > > -- > Douglas Fernando Fischer > Engº de Controle e Automação >
