> Here is an issue I can't figure out. I've search to no avail.
> I have ISC DHCP running on one server (10.1.1.5) and a Cisco switch
> acting as a DHCP relay across VLANs.
> dhclient on Ubuntu 16.04 is reporting DHCPOFFER from 10.10.1.1
> rejected by rule 10.10.1.1 mask 255.255.255.255.
> Yet there is no reject command in the list. Where is this coming from
> and how do I fix?
This can be caused by issues with the dhcp client option request
config. See for example