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I am looking for some sort of routing trickery to set a specific source IP:

Local machine has two IPs;

Eth1: 192.168.0.1

Eth1:2 192.168.0.2

Default gateway is 192.168.0.254 via Eth1

Remote subnet is 10.0.0.0/24

Any traffic that is sent to 10.0.0.x host, I want to leave via Eth1:2 so that it has IP 192.168.0.2 when it is received by the remote hosts, or some how force 192.168.0.2 to be my source IP when talking to 10.0.0.x hosts.

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2 Answers

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It was as simple as ip r a 10.0.0.0/24 via 192.168.0.254 dev eth1:2

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Both interfaces are on the same net, that doesn't make any kind of sense (unless they are connected to switch(es), and you bond them into a single interface). Why this bizarre setup? What are you trying to gain with it?

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Its one physical interface, with two IP addresses. There is policy based routing further up the line, traffic to/from 192.168.0.1 is routed over separate links to traffic to/from 192.168.0.2. I've fixed this now anyway. – javano Feb 11 at 10:23
Please answer your own question (giving any other relevant data) and accept it to close the issue. – vonbrand Feb 11 at 10:36

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