On Fri, May 6, 2022 at 7:18 AM Florian Obser <flor...@openbsd.org> wrote: > Also, dhcpd(8) does not even hand out option 3 when option 121 is > configured.
That doesn't seem like correct behavior (the ISC version certainly offers both). Both options should be sent if configured, it's up to the client to properly handle this. Clients that are rfc3442 compliant will install the option 121 routes, clients that are not rfc3442 compliant will ignore option 121 and install the gateway supplied by option 3. If dhcpd doesn't hand out option 3 when option 121 is configured then clients that are not rfc3442 compliant will not receive a gateway address.
