2 LANs interfaces, behaviour

[heper]

i'm guessing upon LAN-disconnect, pfsense runs a script to remove the routes/rules/… for LAN
because your route for LAN & OPT1 is the same, it affects opt1 and makes your firewall unreacheable.

this is a guess, but i'm probably not incredibly far off target.
as others have pointed out, don't attempt this.... it'll probably be possible with some manual hacking, but why bother? There are plenty of other ways to accomplish your goal.

@Olman:

So … Gurus ....

Any one can explain why do operate on LAN Interface, such as disconnect cable, will affect other interfaces like OPT1 and OPT2.

BUT disconnection OPT1 or OPT2 do not affect other.....
Without empty chat, "it wrong", "outsmart" e.t.c. ; don't watering thread

I have tons of installation of pix, netsceen  some times, they behave out of logic,  but none of them just shut interface 1 and 2 when interface 1 got disconnected....

back to the business:
will check if such behavior exist on 2.0.3 later ...
and it remote network, i can operate within existing /16 network ... so any advise of separate nets, don't work