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Date:      Tue, 09 Oct 2001 16:59:36 -0400
From:      Mike Tancsa <mike@sentex.net>
To:        Luigi Rizzo <rizzo@aciri.org>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: strange side effect of net.inet.ip.fastforwarding: 1
Message-ID:  <5.1.0.14.0.20011009165532.0368b110@marble.sentex.ca>
In-Reply-To: <200110092057.f99Kv5k94419@iguana.aciri.org>
References:  <5.1.0.14.0.20011009164757.036f5080@marble.sentex.ca>

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At 01:57 PM 10/9/01 -0700, Luigi Rizzo wrote:
> >
> > When enabling this, I found that my kernel logs were full of all sorts of
> >
> > arplookup xxx.yyy.zzz.aaa failed: host is not on local network.
> > Any idea why this would be the case ?  A bug ? An effect of a cache
> > lookup/miss?
>
>requests are being normally filtered by the firewall somehow ?
>(i know, arp is not ip, so they should get through anyways...)

This was on a box that had a regular set of OPEN rules.
i.e.
00100 allow ip from any to any via lo0
00200 deny ip from any to 127.0.0.0/8
65000 allow ip from any to any
65535 deny ip from any to any

Also, in terms of queue drops, the fastforwarding did make a small 
difference, but I still am seeing a series of drops somewhere between 5 and 
10min. If you think it would be useful to track down to see if it is 
exactly some interval, I can do so.

         ---Mike


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