LinuxQuestions.org - strange behavior with dhcpcd on 14.1

I noticed that on the Slackware 14.1 installations I'm using at work were not correctly picking up the reserved address on the dhcp server (Windows DHCP Server v6.1 ... but that wasn't mu choice). The issue seamed to be generated by 12 hex digit that the dhcpserver was prefixing the MAC address with. This did not happen on the 14.0 installations so the first thing I started looking for was differences in the dhcpcd.conf and it turns out that 14.1 had the duid option enabled.

I looked in the dhcpcd.conf man page and here's what is has to say about that option:

Code:

 duid        Generate an RFC 4361.  compliant clientid.  This requires persistent storage

            and not all DHCP servers work with it so it's not enabled by default.  The

            duid generated will be held in /etc/dhcpcd.duid and should not be copied to

            other hosts.

Yes definitely Windows DHCP Server v6.1 does not handle RFC 4361 compliant clientid correctly.

I commented the option and things started working as expected.

Hope this can save other people from going nuts on this.