Multiple lan segments with 2 nics and no vlans

[KoalaTNR]

Hello,

we've an network with 16 lan segments. I plan to install clustered pfsense firewall. I can't install 4 4-ports nics in the servers.
I can solve the problem by using vlan. but I don't like it.

Is it possible to implement with only two nics and no vlans? I think I can define the lan subnet in firewall rules… Is it possible and recommended?

Greetings
Thomas

[GruensFroeschli]

I assume you want multiple subnets on the same physical layer.
DO.NOT.DO.THAT (you WILL have major problems with that…)

Using VLANs or more NIC's is the recommended way.