[ofa-general] SystemImageGUID?

[Dotan Barak]

keshetti mahesh wrote:
> Hi all,
>
> Can anyone explain me what is the intended use of SystemImageGUID? I
> f there any existing examples demonstrating the use of SystemImageGUID
>  please give me the pointers to those.
>
The idea of the SystemImageGUID is that you will have an indicators of 
several nodes that exists in the same entity.

It is the same idea about NodeGUID and PortGUID:
All of the IB ports of the same device has the same NodeGUID but every 
port has a different PortGUID.

If you have a big system (for example: a big switching system which 
internally has several switch chips)
every node in the system will has a different NodeGUID but all of the 
nodes in the system will have the same SystemImageGUID.

This helps the SM in the routing decisions.

Dotan