Version 1

show system service dhcp

edit system service dhcp

port Port1
start-address 10.2.86.50
end-address 10.2.86.150
dns-servers 172.16.0.11-172.18.192.10
gateway 10.2.86.254
subnet 255.255.255.0
domain-name wates.co.uk
lease-time 43200
status unchanged

commit

Version 2

edit system service dhcp

enable
dns-primary         172.18.192.10
dns-secondary    172.16.0.11
domain-name      wates.co.uk
end-address         10.2.53.150
gateway                 10.2.53.254
lan                            lan1
lease-time             43200
port                          !
start-address        10.2.53.50
subnet                     10.2.53.0/24
wins-primary       172.18.192.10
wins-secondary   172.16.0.11
status                     success

commit
enable system service dhcp