Unable to get IPV4 with dhcpcd on Alpine in a dual stack setup

Question

After installing dhcpcd, the machine is unable to get IPv4 from DHCP, but generate IPv6 as expected and get DHCPv6 options (like DNS, domain, etc.); the config in /etc/networking/interfaces is

auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp

in /etc/dhcpcd.conf I have:

hostname
duid
persistent
vendorclassid
option interface_mtu
option host_name
option ntp_servers
option rapid_commit
require dhcp_server_identifier
slaac private

The version fo Alpine is 3.18 and the version of dhcpcd is 10.0.1

Answer 1

The problem is that the DHCP server doesn't support the use of DUID as ClientID so the solution is to disable the option duid