dhcpcd-discuss

Hi Mark

On 31/12/2019 15:40, Mark Gannon wrote:
> Hello,
>
> I'm trying to get my Ubuntu 18 box to connect directly to my ATT Uverse 
> account using dhcpcd.  dhcpcd --version returns:
>
> dhcpcd 6.11.5 Copyright (c) 2006-2016 Roy Marples Compiled in features: INET
> IPv4LL INET6 DHCPv6 AUTH

You should look into upgrading dhcpcd!

> Everything works fine for IPv4, but while I receive an IPv6 address, it 
> doesn't cross the router.  Per the instructions for Openbsd at https:// 
> jcs.org/2019/03/21/uverse, I need to specify a DUID.   I could use some 
> assistance configuring dhcpcd to replicate what a successful DHCP request
> from the actually router looks like.  A successful DHCP packet looks like the
> one depicted in this Wireshark screen capture: https://postimg.cc/LJ5NWbwY.
> What would example entries in dhcpcd.conf look like in order to recreate the
> same fields as shown in the image under Client Identifier and
> Vendor-specific Information?

man 8 dhcpcd

Should list where the DUID file is in the FILES section.

dhcpcd-definitions.conf has an example of how to use VI option:
##############################################################################
# Vendor-Identifying Vendor Options
# An example:
#vendopt 12345	encap			frobozzco
#encap 1	string			maze_location
#encap 2	byte			grue_probability

Good luck!

Roy