Solution:

For example : One LAN port is for DHCP server And the other port is a fixed IP. Please use two different domain name. Like: DHCP port : IP address : 172.18.2.100 SubMask : 255.255.255.0 or 255.255.0.0 Gateway : Don't type Fixed IP port : IP address : 192.168.2.200 SubMask : 255.255.255.0 or 255.255.0.0 Gateway : Don't type In the way, the two ports can work well.