Re: Change ip address -

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On 10/06/2015 05:24 AM, Robert Nichols wrote:

      ip route add to 1.1.1.1 dev enp0s25

That's all there is to it. Your system now knows that address 1.1.1.1
can be reached directly (no gateway) on that interface.

And how does that destination respond?

It's not as simple as you suggest. The Buffalo device probably has no (reachable) gateway, so it will only be able to route outgoing packets of its own if the destination is within the broadcast network corresponding to its address and netmask.

The right way to do this was always to add 1.1.1.2 to Bob's interface. Either, as was suggested, using the older (deprecated) ifconfig command:
    ifconfig eth0:0 1.1.1.2 netmask 255.255.255.0
or using ip:
    ip addr add 1.1.1.2/24 dev eth0


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