[openib-general] IPoIB and lid change

[Tziporet Koren]

Eitan Zahavi wrote:
> Hi 
>
> The issue with IPoIB address change is not just LID change but also QP
> change.
> (IPoIB define the MAC to be QP,GID) .
>
> Anytime you do ifconfig down/up you might get a new QP and thus you need
> to refresh the ARP...
>
> I second Mike K. and propose we use gratuitous ARP reply whenever an
> IPoIB interface is brought up.
>  
>   
Note that currently ifconfig down/up keeps the QP number since it only 
reset the QP and not destroy it. A QP number will be changed only if the 
IPoIB module is downloaded.

Tziporet