netdev - Re: Ping Is Broken

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Message-ID: <4AD3A388.7020709@gmail.com>
Date:	Mon, 12 Oct 2009 23:45:44 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Brian Haley <brian.haley@...com>
CC:	Rob.Townley@...il.com, netdev@...r.kernel.org,
	Omaha Linux User Group <olug@...g.org>,
	CentOS mailing list <centos@...tos.org>
Subject: Re: Ping Is Broken

Brian Haley wrote, On 10/12/2009 10:36 PM:

> 
> In this case ping is doing an SO_BINDTODEVICE to eth0, so the kernel is going
> to force the packets out of it, even if it isn't the "correct" interface.  If
> you ran tcpdump you'd probably see an ARP resolution failure, or an ICMP from
> a gateway.

BTW, SO_BINDTODEVICE is used only to acquire a source address, not the real
connection (unless I miss something).

Jarek P.
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