DHCP server works, but it reports a failure when restarting the service. That's in 1.3 Rolling.
```
vyos@vyos:~$
vyos@vyos:~$ restart dhcp server
Job for isc-dhcp-server.service failed because the control process exited with error code.
See "systemctl status isc-dhcp-server.service" and "journalctl -xe" for details.
vyos@vyos:~$
vyos@vyos:~$ systemctl status isc-dhcp-server.service
● isc-dhcp-server.service - LSB: DHCP server
Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
Active: failed (Result: exit-code) since Mon 2020-03-16 11:50:54 UTC; 18s ago
Docs: man:systemd-sysv-generator(8)
Process: 2891 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status
Mar 16 11:50:54 vyos systemd[1]: Starting LSB: DHCP server...
Mar 16 11:50:54 vyos isc-dhcp-server[2891]: Launching both IPv4 and IPv6 servers
Mar 16 11:50:54 vyos isc-dhcp-server[2891]: Starting ISC DHCPv4 server: dhcpddhc
Mar 16 11:50:54 vyos systemd[1]: isc-dhcp-server.service: Control process exited
Mar 16 11:50:54 vyos systemd[1]: isc-dhcp-server.service: Failed with result 'ex
Mar 16 11:50:54 vyos systemd[1]: Failed to start LSB: DHCP server.
vyos@vyos:~$
vyos@vyos:~$ journalctl -xe
Mar 16 11:50:54 vyos systemd[1]: isc-dhcp-server.service: Control process exited
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit isc-dhcp-server.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 1.
Mar 16 11:50:54 vyos systemd[1]: isc-dhcp-server.service: Failed with result 'ex
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit isc-dhcp-server.service has entered the 'failed' state with result '
Mar 16 11:50:54 vyos systemd[1]: Failed to start LSB: DHCP server.
-- Subject: A start job for unit isc-dhcp-server.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit isc-dhcp-server.service has finished with a failure.
--
-- The job identifier is 507 and the job result is failed.
Mar 16 11:50:54 vyos sudo[2888]: pam_unix(sudo:session): session closed for user
vyos@vyos:~$
```