# set all DHCP lease times to 1h
/ip dhcp-server set lease-time=1h [find name=culleoka]
/ip dhcp-server set lease-time=1h [find name=cpe]
/ip dhcp-server set lease-time=1h [find name=culleoka-tower]
/ip dhcp-server set lease-time=1h [find name=clayton]