Re: LU access through an iSCSI session

["Matt Wakeley" <matt_wakeley@agilent.com>]

Robert Snively wrote:

> >  LU numbers are identical across all of the TCP connections of a
> >  single iSCSI session.
>
> This is an intriguing concept.  At present, SCSI does not require
> logical units to have the same LUN if they are accessed through
> different NICs.  However, present SCSI is essentially one NIC per session.
>
> If you have an iSCSI session using NIC A and NIC B and a second session
> using NIC B and NIC C as physical paths, by this definition,
> NIC B could have two different LUNs for the same logical unit, one
> from each session.

>
> That should not be a problem, right?

Right.  And the reason is because NIC B by itself does not access the LUNs.
The iSCSI session running through NICs B and C has a view of LUNs that could
be different than the iSCSI session running through NICs A and B.  Remember,
the iSCSI session is simply using TCP connections through the NICs.  The TCP
connections by themselves know nothing about iSCSI or LUNs.

-Matt