From: Luca Mollica before trying to configure the double ip connection, which one do you mean by "the first one" ? Mayb do you mean Riccardo Facchni's advice to add a virtual ethernet card with eth0:0 ?
Luca, I believe that he was referring to the method of creating virtual interfaces that I posted, where IP aliases are created in the ifcfg-eth0 file, not separate files. I have read else where (possibly on this group, try a search) that the other method has some problems and this is the preferred one. Sorry, I don't recall where. To me deprecated means that although it works (the eth0:0 method) a newer, preferred method has been implemented (the one I posted). Having said this you may prefer to use the method recommended by Riccardo Facchni as it will allow you to define all parameters to meet your needs, not just the IP of the new interface. I would try both and see which works best for you and bear in mind that deprecated (to me) means that there is the potential for the method to become unsupported (i.e. not work) in the future. Regards, Damon