Questions about your dual Opteron packetfiltering tests

David S. Miller davem at
Fri Sep 10 23:29:25 CEST 2004

On Tue, 7 Sep 2004 10:41:51 +0200
Harald Welte <laforge at> wrote:

> > net/ipv4/conf/all/rp_filter=1
> never ever enable rp_filter, that makes a huge difference.  rp_filter is
> not even recommended as default, and probably Debian is the only
> distribution doing that mistake (read netdev archives on this).

Absolutely correct.  This setting causes routing lookups to be
2 to 3 times more expensive.

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