netdev - Re: Linux arp flux problem

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Message-ID: <Pine.LNX.4.58.1004131118290.2767@u.domain.uli>
Date:	Tue, 13 Apr 2010 11:26:32 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	Ming-Ching Tiew <mctiew@...oo.com>
cc:	Net Dev <netdev@...r.kernel.org>
Subject: Re: Linux arp flux problem


	Hello,

On Sun, 11 Apr 2010, Ming-Ching Tiew wrote:

> The following link explains the Linux arp flux problem pretty well, and I myself have been burnt badly by a life site where the "arp_filter" does not help at all.
> 
>          http://linux-ip.net/html/ether-arp.html
> 
> And I tested the kernel patch by Julian Anastasov, and it works 100% reliably :-
> 
>          http://www.ssi.bg/~ja/#hidden
> 
> My question is the patches has been around for many years, why has it not been included into the kernel ? Is it that Linux is supposed to have this "side effects" of arp linux on purpose ?

	The "hidden" flag is obsolete, kernel already has arp_ignore
and arp_announce vars, see Documentation/networking/ip-sysctl.txt
for more information. May be what you need is arp_announce=1/2
and (arp_ignore=1/2 or arp_filter=1 or rp_filter=1).

Regards

--
Julian Anastasov <ja@....bg>
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