From: "David Schwartz" <davids@webmaster.com>
To: "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Subject: RE: UDP question.
Date: Fri, 15 Sep 2006 15:23:34 -0700
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> My two adapters has two different IP address, and I bind one IP
> on one socket,
> do you mean that I alloc two socket and bind different IP is not
> helpful?

	Correct. You are still sending all the packets *to* the same place.

> In fact, all the packet sent from two socket is go out by one
> network adapter?

	Yes, of course. Why would the kernel send traffic to a destination out an
interface that doesn't go to that destination?

	Suppose you have two interfaces, 1.2.3.4/8 and 10.2.3.4/8, if you are
sending a packet *to* 1.2.4.5, it will go out the first interface. This
applies whether the source address is 1.2.3.4 or 10.2.3.4.

	By default, the kernel routes traffic based on where it is going, not which
interface address it came from.

	DS


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