Re: iSCSI: multiple sessions b/n a pair of WWUIs.

[Santosh Rao <santoshr@cup.hp.com>]

Jim,

Agreed on the ISID issue. One additional comment below.

Regards,
Santosh

Jim Hafner wrote:

> The spec might make a note that says that multiple sessions
> handlers within a given iSCSI Node sharing a common iSCSI Name should
> coordinate their use of ISIDs (carve the name space between them) to avoid
> rejected login by one session handler because it reused an ISID already in
> use by another session handler. 


As I've brought up before, login rejection when a target receives a
second session login from the same (iSCSI Initiator Name, ISID) when the
first session login is still active may not be a good option.

This scenario can typically occur when the host rebooted without having
done a logout and then attempts to re-login. The host must be allowed to
maintain persistence of its ISID without being rejected in its login
attempt.

I'd suggest something along the following lines :
" When the target receives a second session login while one is already
active for a given
(iSCSI Initiator Name, ISID), it MUST treat this as an implicit logout
of the prior session and then accept the second login". [provided the
login authentication was successful].

I believe this is also what Spteh Bailey had in mind when writing up
algorithms for ERT (?). Do you see any issues with such an approach. (?)
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