Date: Tue, 14 May 2013 20:42:45 +0200 From: =?ISO-8859-1?Q?Olivier_Cochard=2DLabb=E9?= <olivier@cochard.me> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: h bagade <bagadeh@gmail.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>, Jack Vogel <jfvogel@gmail.com> Subject: Re: how to completely makes an interface down? Message-ID: <CA%2Bq%2BTcof57JMtUgo%2BBDgW-TS5fyYe5nJx4wYx_oHnmOywN3=MA@mail.gmail.com> In-Reply-To: <519227E2.2090801@rdtc.ru> References: <CAARSjE0-pFR0yf7xbycPkjrZCvokGp=r7Ls=HeP83t60nhGVVg@mail.gmail.com> <20130124195056.GB1410@funkthat.com> <CAARSjE1qZcn0AiMiU5L8Bd0SVFM=f0VvKxMgor56naNFt46hug@mail.gmail.com> <519227E2.2090801@rdtc.ru>
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On Tue, May 14, 2013 at 2:02 PM, Eugene Grosbein <egrosbein@rdtc.ru> wrote: > > I've needed this feature several years ago so I made a patch for igb(4) and em(4) drivers. > The patch introduces new per-interface sysctls with default zero values: > > dev.em.X.down_disables_link > dev.igb.X.down.disables_link > > With this patch, sysctl dev.em.0.down_disables_link=1 makes "ifconfig em0 down" bring link down. > For LACP mode this feature is very useful as it makes LACP peer reconfigure itself quickly. > Great ! but what about adding a generic ifconfig mediaopt option in place of adding another new sysctl ? Something like "poweroff", "linkdown" or your "disablelink" as example. Because with this kind of sysctl values we can imagine a non-homogeneous future: We have already this problem with flow-control on em(4). The sysctl option for configuring flowcontrol on em(4) (no idea how to configure it with other drivers) are: - dev.em.0.fc (if chipset depends of if_em.c) - dev.em.0.flow_control (if chipset depends of if_lem.c) => By using ifconfig like "ifconfig INTERFACE mediaopt flowcontrol off|rx|tx|full" we could prevent different sysctl names between all NIC drivers. Regards, Olivier
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