Re: iSCSI: Clarification requested

[Mark Bakke <mbakke@cisco.com>]

We implemented a similar thing early last year, which allowed
multiple targets to be accessed on a session, but only one session
on the connection.  There's no session ID in the PDU headers, so
multiple sessions on a connection could probably not be done
anyway.  We later decided that multiplexing targets on a session
was just not worth doing.

I think that if it hasn't been clearly stated already, the iSCSI
spec should say:

  1 initiator-target pair per session
  1 session per connection

The MIB reflects this model.

--
Mark

Stephen Bailey wrote:
> 
> Prasenjit,
> 
> > Can multiple iSCSI sessions share a TCP/IP connection?
> 
> Huh?  My knee jerk is, absolutely not!  How could that work?  How are
> the PDUs for different sessions distinguished?
> 
> Independently of that, the login process doesn't allow it.  There's
> only one SID pair exchanged, with a Login/Login Response and then the
> connection is in full feature mode (at which point, you couldn't
> exchange more SIDs).
> 
> > (We came across an implementation that does this).
> 
> So, I'll bite, how DOES said implementation do this?
> 
> Wow.
> 
> Thanks,
>   Steph

-- 
Mark A. Bakke
Cisco Systems
mbakke@cisco.com
763.398.1054