Re: iSCSI: NOPs on discovery session

[Mark Bakke <mbakke@cisco.com>]

Mark-

This is true, but in cases where iSCSI is run through firewalls,
it may be easier to just allow the iSCSI port through the
firewall, and not allow the discovery protocols.  This makes
SendTargets the only way to do discovering in this situation,
and to use an async message for discovery as targets become
available requires the session to be kept around.

Keep in mind that this may not be the normal, everyday way to
use a discovery session, so not all discovery sessions will
have to be long-lived.  I think that this is a necessary option
to provide for the firewall situation.

--
Mark

"Mark S. Edwards" wrote:
> 
> At 09:08 AM 12/6/2001 -0600, Ayman Ghanem wrote:
> >If the initiator choose to keep the discovery session up, the target could
> >use it to inform the initiator of new targets or LUNs it can access.
> >
> >-Ayman
> 
> SLP and iSNS will already do this and since SLP is mandatory to implement,
> this feature already exists.
> 
> Discovery sessions should be short lived, they tie up network
> resources.  Can you imagine 1000 initiators with long lived discovery
> sessions on a target ?  Any sensible target will probably implement a timer
> on a discovery session anyway.
> 
> Mark.