[openib-general] Setting HCA LinkWidth

[Fabian Tillier]

Hi Amit,

On 10/3/06, Amit H Kumar <AHKumar at odu.edu> wrote:
>
> Hi OpenIB,
>
> I am not sure if this question belongs to this list or not. But if anyone
> can give me some lead it will be very helpful.
>
> One of the HCA card in our cluster is running at LinkWidth 1x: as opposed
> to 4x on all other nodes.
> I have been trying to set it to 4x using the iba_portconfig tool but
> nothing seems to work.
>
> Can anyone tell me what is the general approach in doing so.

If the port is coming up as 1x, it likely indicates a bad cable.  You
can check the port error counters to validate, or you can exchange two
cables (one of which you know was used in a 4x link) and see if the
problem follows the cable.

- Fab