Enable/Disable flow control in FreeBSD

[Pieper, Jeffrey E]

-----Original Message-----
From: owner-freebsd-net at freebsd.org [mailto:owner-freebsd-net at freebsd.org] On Behalf Of Nikolay Denev
Sent: Wednesday, July 25, 2012 6:04 AM
To: m s
Cc: freebsd-net at freebsd.org
Subject: Re: Enable/Disable flow control in FreeBSD

On Jul 25, 2012, at 11:47 AM, m s wrote:

> Hi all. I want to disbale flow control on network interfaces.I must do a
> test and I can't because flow control in enable.Is it enable as default?How
> I can disable it?
> Thanks
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>It depends on whether the driver supports it.
>The drivers that support it can control it with the ifconfig(8) media options.
>You can try "ifconfig -m $your_interface" to see if there are any mediaopts regarding flow control.

Intel devices use sysctl to enable/disable flow control:

#sysctl -a|grep fc

dev.em.X.fc:3
dev.igb.X.fc:3
dev.ix.X.fc:3

Hope this helps.