[ofa-general] change mtu

[Michael Di Domenico]

Yes, I have a group of machines with 8131 and MT23108 cards.
Supposedly, based on the AMD errata i need to turn the cards MTU down
from 2048 to below 1500

No i'm not running OpenSM, i'd prefer to do this at the machine level
if possible rather then the fabric level.

On Mon, Aug 17, 2009 at 9:00 AM, Hal Rosenstock<hal.rosenstock at gmail.com> wrote:
>
>
> On Mon, Aug 17, 2009 at 8:52 AM, Michael Di Domenico
> <mdidomenico4 at gmail.com> wrote:
>>
>> Yes, for the IB card itself, not IPoIB
>
>
> The MTUCap of the card can affect the NeighborMTU which in turn can
> affect IPoIB MTU (for UD mode).
>
> -- Hal
>
>>
>> On Mon, Aug 17, 2009 at 8:48 AM, Dotan Barak<dotanba at gmail.com> wrote:
>> > Hi.
>> >
>> > Which MTU do you try to change?
>> > (of the IB link?)
>> >
>> > Dotan
>> >
>> > On Mon, Aug 17, 2009 at 3:16 PM, Michael Di
>> > Domenico<mdidomenico4 at gmail.com> wrote:
>> >> How do I change the MTU of an MT23108 card?  I have an AMD 8131
>> >> chipset server that needs this turned down below 1500, or atleast
>> >> that's what's suspected.
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>