I do Anycast for much much smaller. It's great to reboot one server and have the other take all of the load. 0 customer interruption, not even a single DNS query lost.
On Fri, Aug 8, 2025, 12:21 PM William Herrin via NANOG < [email protected]> wrote: > On Fri, Aug 8, 2025 at 2:17 AM Måns Nilsson via NANOG > <[email protected]> wrote: > > anycast unbound, preferably on something more mature than Linux, so like > > FreeBSD or OpenBSD. > > You don't need anycast DNS for 30k users. Stay away from anycast > unless you really, really, really know what you're doing. > > DNS is also TCP and no commodity DNS software environment implements > an anycast TCP stack, only the normal unicast stack. Route splitting > shows up in the most unexpected places and it won't just give you a > bad day, it'll give you a bad month with intractable and seemingly > (but not really) intermittent problems that are challenging to nail > down. > > Regards, > Bill Herrin > > > -- > William Herrin > [email protected] > https://bill.herrin.us/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/ZBFC32QZCJA6ZEYKJ5FG4RYWPY7V7SFO/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/4YM4QHEYBCY2DKEZZ3B7EVZVF25FOFDM/
