how to completely makes an interface down?

[Adrian Chadd]

... we have flow-control in ifconfig, don't we?


On 14 May 2013 11:42, Olivier Cochard-Labbé <olivier at cochard.me> wrote:
> On Tue, May 14, 2013 at 2:02 PM, Eugene Grosbein <egrosbein at 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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