can an alias address be routed through?

I have openBSD 3.8 box with 2 interfaces acting as a router between
two internal networks.

Inteface xl0 192.168.1.1 with a subnet mask of 255.255.0.0

The other interface sis0 has an address of 192.169.1.254 with a subnet
mask of 255.255.0.0

It seems to be routing successfully between these two networks. Now
one device on the 192.168 network is a legacy device and i cannot
change its subnet mask - it is 192.168.222.1 and subnet 255.255.255.0

I thought i would just add an alias to xl0 of 192.168.222.254 with
subnet of 255.255.255.0 and hey presto from the gateway BSD console i
can ping everything. BUT from the 192.169 network It still doesnt
repond to ping. If i add a route

route add 192.168.222.1 192.168.222.254

I cannot ping 192.168.222.1 from the BSD box console anymore and it
still doesnt route from the other network.

my question: Can BSD route to an alias address on an interface or
not? My next effort will be to add another network card with a
primary address of 192.168.222.254

.

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