We
were looking for something like that for a cluster that we are building.
The closest thing that I found was the IP Aliasing module. This allows for
multiple (upto 255) IP's per NIC. Also, be able to respond to them
depending on destination IP using IP Chains. For some types of
applications, this seems to work well. If you are looking for something to
the effect that you have a virtual interface to several NICS, then the closest
that I've seen is ARP Aliasing, although that isn't really what it was designed
for, that may work.
-Shannon
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