i have a setup that uses multiple IP segments on the LAN interface. to 
have both segments work i added 1 IP the regular way and one in the 
<shellcmd> section of the <system> section of the config.xml
    <shellcmd>ifconfig vxn0 192.168.1.0 netmask 255.255.255.0 gateway 
192.168.1.254 alias</shellcmd>
and after adding a static route on the LAN pointing towards itself as 
gateway, it works like a charm.

but when something happens to the network stack, like a vpn connection 
or pptp or whatever, the secondary IP address is lost..

anybody know how to get this done to keep this working?