Confirmed broken on AWS w/ ena(4) as well. On Tue, 15 Oct 2019, Jun Ebihara wrote:
NetBSD-9.99.17-evbarm-earmv6hf-201910131330Z dhcpcd can't get IPv4 address, NetBSD-9.99.15-evbarm-earmv6hf-201910071930Z dhcpcd can get IPv4 address. check dhcpcd update during 201910071930Z to 201910131330Z. -- Jun Ebihara