[ipxe-devel] Infiniband GUID

[Michael Brown]

On 06/09/17 00:38, Allen, Benjamin S. wrote:
> I'm attempting to emulate what we're doing for ethernet clients in ISC-DHCP by passing the iPXE cfg path, eg 'filename "http://10.1.1.1/ipxe/cfg/${mac}";', where iPXE helpfully evaluates and fills in ${mac}.

The (local) eIPoIB MAC address is systematically derived from the GUID 
by just omitting the middle two bytes:

   http://git.ipxe.org/ipxe.git/blob/HEAD:/src/drivers/net/ipoib.c#l273

If you know the GUID, then you can trivially calculate the IPoIB MAC 
that will be used by iPXE (and exposed as ${netX/mac}).  Does this give 
you the functionality that you need?

Michael