Except it turns out that getting IPv4 address via DHCP takes long enough that my NFS mounts then don't come up.

I ended up writing an exit-hook, documented here: https://github.com/NetworkConfiguration/dhcpcd/issues/100#issuecomment-2429121515

It works, but still feels a little fragile. Perhaps I should attempt converting `/etc/network/if-up.d/nfsmounts` to systemd paradigms....

#debian #linux #dhcp #dhcpcd #isc

So, the #Mikrotik DHCP server accepts multiple leases with the same MAC address, if they send different ClientIDs.

At some point since the last reboot, the config of #dhcpcd changed and used a different algorithm to pick a ClientID, so the machine wasn't receiving the correct address.

Amusingly, #IPv6 saved my ass because SLAAC did pick the correct address.

OK, this post from the link I originally shared got it right: https://forums.FreeBSD.org/threads/is-there-a-working-dhcpv6-client-for-freebsd.60168/post-453562

The trick to a working #DHCPv6 client in #FreeBSD seems to be to install #dhcpcd and then add the following lines to /etc/rc.conf:
```
rtsold_enable="YES"
dhcpcd_enable="YES"
```
*Avoid* having an ifconfig_<interface>_ipv6 line in addition to that, and all seems to work well.