Does this device (or RouterOS in general) supports single WAN port with multiple dhcp public IPs on different subnets? My search has shown many use cases include single WAN port with multiple static IPs on in the same range (i.e. 1.1.1.5, 1.1.1.6, 1.1.1.7, 1.1.1.8).
I get two dhcp IP's from my ISP. For the longest time I have used a mini switch to connect cable modem and two consumer routers to utilize two IP addresses (one for LAN/Home, the other for DMZ/ITLab). Trying to do without the mini switch, I have gotten a ubiquity ER Lite 3 port where eth0=LAN, eth1=DMZ, eth2=WAN.
eth2 has two pseudo-ethernet interfaces (peth20 and peth21).
For Internet access, I want LAN and DMZ each have their own public IP.
eth0-->peth20
eth1.251-->peth21
When ether one is enabled while the other is disabled, the enabled can access the Internet.
When both are enabled, LAN has sluggish connection while DMZ barely can access any website.
I posted on ubnt community forum.
EdgeRouter Lite 1 ISP with 2 dhcp IP addresses (not load balancing) - Ubiquiti Networks Community