Message-ID: <47670B88.4010906@trash.net>
Date: Tue, 18 Dec 2007 00:51:36 +0100
From: Patrick McHardy <kaber@trash.net>
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To: Chris Friesen <cfriesen@nortel.com>
CC: yoshfuji@linux-ipv6.org, dada1@cosmosbay.com, netdev@vger.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: "ip neigh show" not showing arp cache entries?
References: <4760279E.1080203@nortel.com>	<47602DD0.8070402@cosmosbay.com> <47605934.2060604@nortel.com> <20071213.070641.20411400.yoshfuji@linux-ipv6.org> <476696A5.1010101@nortel.com> <4766B99D.8060408@trash.net> <4766D261.1020005@nortel.com>
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Chris Friesen wrote:
> Patrick McHardy wrote:
> 
>>  From a kernel perspective there are only complete dumps, the
>> filtering is done by iproute. So the fact that it shows them
>> when querying specifically implies there is a bug in the
>> iproute neighbour filter. Does it work if you omit "all"
>> from the ip neigh show command?
> 
> Omitting "all" gives identical results.  It is still missing entries 
> when compared with the output of "arp".


In that case the easiest way to debug this is probably if you
add some debugging to ip/ipneigh.c:print_neigh() since I'm
unable to reproduce this problem. A printf for all the filter
conditions (=> return 0) at the top should do.

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