[Techtalk] How to hard code the speed of a virtual interface (bond0)?

[Joana Botto]

Thank you Rudy!

Regards,
Joana

On Thu, May 7, 2009 at 11:03 AM, Rudy Zijlstra
<rudy at grumpydevil.homelinux.org> wrote:
> Hi Joana,
>
> Op donderdag 07-05-2009 om 10:48 uur [tijdzone +0100], schreef Joana
> Botto:
>> Hi,
>>
>> I configured two NICs with bonding, balance-alb. But now I would like
>> to hard code the bond0 interface speed to 1000Mb and full duplex.
>> Because bond0 it's a virtual interface, the ethtool output says the
>> interface doesn't exist.
>
> fixing speed on a gigabit is pretty much against the spec, and i suspect
> that is why this is failing. auto-negotiation on Gigabit is a mandatory
> part of the gigabit spec. Also, with gigabit please always use cables
> with 8 wires, and not the cheaper 4 wire cables that could work with
> 100Mbit or lower NIC's.
>
> Cheers,
>
> Rudy
>
>>
>> In /etc/rc.local I've put
>> ethtool -s eth0 duplex full speed 1000 autoneg off
>> ethtool -s eth1 duplex full speed 1000 autoneg off
>>
>> But ethtool still says that autoneg is on.
>>
>> I didn't found anything relevant in google.
>>
>> Does anyone have an idea how to do it? Thank you.
>>
>>
>> Regards,
>> Joana Botto
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>
>