Add DHCP Server

/ip pool add name=dhcp_pool ranges=192.168.88.10-192.168.88.100

Configure DHCP Server

/ip dhcp-server add name=dhcp1 interface=ether2 address-pool=dhcp_pool disabled=no
/ip dhcp-server network add address=192.168.88.0/24 gateway=192.168.88.1 dns-server=8.8.8.8

# Keyword description
address-pool：Specify a DHCP address pool.
gateway：Default Gateway。
dns-server：Setting DNS Server Address

Verify configuration

DHCP Server

Client get ip address