netdev - Re: tc action mirred packet lost

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Date:	Mon, 01 Nov 2010 12:15:55 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	adam.niescierowicz@...tnet.pl
CC:	netdev@...r.kernel.org
Subject: Re: tc action mirred packet lost

Nieścierowicz Adam wrote:
> Hello,
> recently there was a need to create 3-4 copies of the data sent to the
> router, I decided to use the tc action mirred.
> 
> 
> Ingress traficn on eth1 copies to eth1 eth2, eth3, eth4, eth5 using:
> ---
> tc qdisc add dev eth1 ingress
> 
> tc filter add dev eth1 parent ffff: protocol ip prio 10 u32 match ip src
> 0/0 flowid 1:1 action mirred egress mirror dev eth2 pipe action mirred
> egress mirror dev eth3 pipe action mirred egress mirror dev eth4 pipe
> action mirred egress mirror dev eth5
> -- 
> 
> 
> Unfortunately the number of packets seen on eth1 qdisc is different than
> the eth [2-5]

Hi,
Usually the reason for such differences is arp or other non-ip
protocols. Try a filter with "protocol all" to check this.

Jarek P.
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