Re: iSCSI behavior

["Ye, Ting" <ting.ye@intel.com>]

Hi Naveen,

For 1), if you configure two attempts with iSCSI Mode "Enabled", you will receive an warning that you have configured two attempts using same NIC. 
If you configure two attempts with iSCSI Mode "Enabled for MPIO", it is valid, and if the first attempt failed, the second attempt will be tried.

For 2), Enabled for MPIO means you have enabled multi path I/O in iSCSI for supporting failover.

For 3 and 4), iSCSI does not allow configuring one new IPv6 address using iSCSI menu so Attempt #1 does not show initiator address.
Instead, iSCSI driver will let IPv6 driver to perform source address selection according to the configured iSCSI target IP address. You need assign IPv6 source address using ifconfig6 or autoconfiguration before using iSCSI on IPv6 stack.

Thanks,
Ting Ye


-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Santhapur Naveen
Sent: Tuesday, August 29, 2017 2:46 PM
To: edk2-devel@lists.01.org
Subject: [edk2] iSCSI behavior

Hello all,

I've some questions regarding iSCSI. Please help me out.


1.       If I have added two attempts and are enabled for the same MAC, if the first attempt fails to connect, will the second attempt be tried?

2.       If answer to the above is YES, then what's the difference between ISCSI Modes 'Enabled' and 'Enable for MPIO'?

3.       In our observation, we've found that the behavior is not same when two attempts are added for IPv4 and IPv6.

4.       Are there any standard set of test procedures for ISCSI behavior?

The following is the conflict
Case 1:
Attempt#1------Enabled for MPIO------IPv6-----DHCP Attempt#2------Enabled for MPIO------IPv6-----DHCP

Actual behavior: Attempt#2 doesn't show any initiator IPv6 address.

Case 2:
Attempt 1------Enabled for MPIO------IPv4-----DHCP Attempt 2------Enabled for MPIO------IPv4-----DHCP

Actual behavior: Attempt#2 shows Initiator IPv4 address.

Please provide your suggestions.

Thank you
Naveen
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