netdev - Re: [PATCH net-next-2.6] ipv4: add LINUX_MIB

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Message-Id: <20100603.031943.00479383.davem@davemloft.net>
Date:	Thu, 03 Jun 2010 03:19:43 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	cl@...ux-foundation.org, netdev@...r.kernel.org,
	shemminger@...tta.com
Subject: Re: [PATCH net-next-2.6] ipv4: add LINUX_MIB_IPRPFILTER snmp
 counter

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 03 Jun 2010 00:05:27 +0200

> [PATCH net-next-2.6] ipv4: add LINUX_MIB_IPRPFILTER snmp counter
> 
> Christoph Lameter mentioned that packets could be dropped in input path
> because of rp_filter settings, without any SNMP counter being
> incremented. System administrator can have a hard time to track the
> problem.
> 
> This patch introduces a new counter, LINUX_MIB_IPRPFILTER, incremented
> each time we drop a packet because Reverse Path Filter triggers.
> 
> (We receive an IPv4 datagram on a given interface, and find the route to
> send an answer would use another interface)
> 
> netstat -s | grep IPReversePathFilter
>     IPReversePathFilter: 21714
> 
> Reported-by: Christoph Lameter <cl@...ux-foundation.org>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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