[Kea-users] Specifying a netmask different for listening and client assignment

[Francis Dupont]

In Kea the subnet-mask (1) option is explicitely NOT in the list of
standard DHCPv4 options configurable by an administrator so trying to
set a value in an option-data entry does not work.

So you have to use the flex option hook library to supersede the option
value before responses are sent. I am afraid that it is the most common
usage of this tool but it was reported to do the job by all persons
who asked this question about how to change the netmask in this list...

Regards

Francis Dupont <fdupont at isc.org>

PS: there is a KB article about this but if you believe this should be
added as an example in the ARM open a ticket in Kea gitlab.