Date: Fri, 19 Nov 2010 18:18:00 +0000 From: Holger Rauch <Holger.Rauch@empic.de> To: Chris Buechler <cbuechler@gmail.com> Cc: "freebsd-pf@FreeBSD.org" <freebsd-pf@freebsd.org> Subject: RE: PF from OpenBSD 4.5 available as patch for 8.1-STABLE? Message-ID: <1989F0C06F24544989EB233736143E7C01F7A854@MX1.heitec.net> In-Reply-To: <AANLkTikj9q543N01nU4-nbUeh5ts391YUh7Qtkcbjs5B@mail.gmail.com> References: <1989F0C06F24544989EB233736143E7C01F7A6CC@MX1.heitec.net>, <AANLkTikj9q543N01nU4-nbUeh5ts391YUh7Qtkcbjs5B@mail.gmail.com>
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Hi Chris,
thanks for mentioning this. Unfortunately I forgot to mention that the pr=
oblem doesn't occur when both hosts are on the same subnet (i.e. no firew=
all in between, only HP ProCurve switches).
But I will follow your suggestion and try to disable HW checksum offloadi=
ng.
Greetings,
Holger
________________________________________
From: Chris Buechler [cbuechler@gmail.com]
Sent: Friday, November 19, 2010 19:08
To: Holger Rauch
Cc: freebsd-pf@FreeBSD.org
Subject: Re: PF from OpenBSD 4.5 available as patch for 8.1-STABLE?
On Fri, Nov 19, 2010 at 10:21 AM, Holger Rauch <Holger.Rauch@empic.de> wr=
ote:
> Hi,
>
> is there such a patch? The reason why I ask for it is:
>
> I'm currently experiencing saturated network interfaces when using giga=
bit networking in conjunction with certain Linux driver<->NIC combos for =
Broadcom chips against the PF version shipped with FreeBSD 8.1 stable run=
ning on a HP ProLiant DL 180 G5 server.
>
> The problem only occurs with high throughputs (at least 30 MBytes/sec) =
caused by scp/rsync. Up to now, I've come accross this issue with
>
> Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (re=
v 02) (tg3 driver in Linux)
>
> and
>
> Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
> (bnx2 driver in Linux; this is used in various HP ProLiant servers)
>
> But it doesn't occur with Intel chips and also not with this chip
>
You're trying to fix a NIC driver-related issue by messing with your
firewall, you're most likely looking in the wrong place. May have more
luck posting to freebsd-net. One thing to try is disabling hardware
checksum offloading (rxcsum, txcsum) to see if that makes any
difference, with some NICs it causes issues.
THE standard software for Aviation Authorities
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