netdev - Re: "ip neigh show" not showing arp cache entries?

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Date:	Tue, 18 Dec 2007 00:51:36 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Chris Friesen <cfriesen@...tel.com>
CC:	yoshfuji@...ux-ipv6.org, dada1@...mosbay.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: "ip neigh show" not showing arp cache entries?

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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