On Tue, Jul 7, 2009 at 11:36 PM, Michael Richardson <mcr@sandelman.ca> wrote:

 Maybe it matters less in the cloud where network interfaces are all
virtual, and so it's easy to have more than one... however, in the
physical world, you sometimes get subnets that are non-aggregatable
(usually because you got additional allocation from ARIN/ISP/etc.), and
you want to run things such that they all are on the same physical
network.
 In Linux-speak, this means you do something like:
    ip addr  add 3.4.5.6/24 dev eth0
    ip route add 1.2.3.0/24 dev eth0

Actually now that you mention it I did similar things in a former life as a sysadmin... I'd written a kernel module for network quotas and some of the sites had overlapping subnets for admin vs student machines.

So we'll leave it there for now in case someone wants to conduct similar (virtual) evil.

Sam

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