DHCP options can be specified in RADIUS or Local User Database (LUDB) and then appended to the options present in DHCP messages to the client:
from RADIUS, using the 26.6527.103 Alc-ToClient-Dhcp-Options and 26.6527.192 Alc-ToClient-Dhcp6-Options in an Access-Accept message
in LUDB, by configuring to-client-options:
config>subscr-mgmt>loc-user-db>ipoe>host
to-client-options
ipv4
option <option-number>
exit
ipv6
option <option-number>
exit
exit
config>subscr-mgmt>loc-user-db>ppp>host
to-client-options
ipv6
option <option-number>
exit
exit
When a DHCPv4 Domain Name Server Option (6), a DHCPv4 NetBIOS Name Server Option (44), or a DHCPv6 DNS Recursive Name Server option (23) is included using the described To Client Options methods, these options are appended in the outgoing DHCP message to the client, irrespective of whether DNS or NBNS options were already present. The name servers included in the DHCP options with the To Client Options method are not associated with the subscriber session as primary, secondary, or extended DNS servers.