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Re: Bug? ARP with wrong src IP address

To: "Carlos Velasco" <carlosev@xxxxxxxxxxxx>, "Julian Anastasov" <ja@xxxxxx>
Subject: Re: Bug? ARP with wrong src IP address
From: "Carlos Velasco" <carlosev@xxxxxxxxxxxx>
Date: Thu, 24 Jul 2003 20:11:42 +0200
Cc: "Bart De Schuymer" <bdschuym@xxxxxxxxxx>, netdev@xxxxxxxxxxx
In-reply-to: <200307241836060226.006FACEB@xxxxxxxxxxxxxx>
References: <Pine.LNX.4.44.0307241922270.10460-100000@l> <200307241836060226.006FACEB@xxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
On 24/07/2003 at 18:36 Carlos Velasco wrote:

>>      There are some exceptions for the src IP. Even Linux will
>>not reply if the src IP in incoming probe matches local IP. But
>>may be only Linux preserves the src IP in outgoing probes.

Tested these platforms:

Solaris 8 -> sends src IP address of INTERFACE
Cisco -> sends src IP address of INTERFACE
Windows 2000, XP -> sends src IP address of INTERFACE
Linux 2.6.0-pre1, 2.4.20, 2.4.21 -> sends src IP address of LOOPBACK

Question: ¿What would be the implications of applying my patch or similar to do 
linux behave like other OS?

>Will open a TAC case tomorrow. I'm interested on testing this in Solaris.

Same tests:

Solaris 8 -> replies the ARP request
Windows 2000, XP -> replies the ARP request
Linux 2.4.21 -> replies the ARP request
Cisco -> NOT replies the ARP request

I will contact Cisco to see why they don't do and if it can be fixed in future 
releases.

Regards,
Carlos Velasco




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