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Operating Systems AIX How to configure iSCSI TOE w/ load balancing? Post 302750259 by cbrinker on Monday 31st of December 2012 09:29:05 AM
Old 12-31-2012
How to configure iSCSI TOE w/ load balancing?

Sorry guys but let me start off by saying I am an AIX noob! I am running AIX 6.1 and recently purchased two iSCSI TOE cards. The plan is to connect these two cards to a Dell EqualLogic SAN and that has two volumes configured for logs and data.

The point of the two cards is to do load balancing and fail over if one card does, obviously I am interested in making this reliable and always available.


What I have done so far is:

Configured the ics0 and ics1 to have
IP addresses on the iSCSI network with the SAN
discovery policy of file
Edited the /etc/iscsi/targetshw# to include the paths to both volumes that I have configured

Now, when I do lspv, I see four new hdisks, because each card has connected to each volume. So obviously I have duplicate connections.

What I want to do is have these two cards load balance the connection and failover if a card dies and that's where I am stuck. I have read a little on MPIO but not having much luck with iSCSI TOE.

Can anyone add any configuration advice, it would be much appreciated!!
 

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ISCSI_INITIATOR(4)					   BSD Kernel Interfaces Manual 					ISCSI_INITIATOR(4)

NAME
iscsi_initiator -- kernel driver for the iSCSI protocol SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device iscsi_initiator Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): iscsi_initiator_load="YES" DESCRIPTION
The iscsi_initiator implements the kernel side of the Internet SCSI (iSCSI) network protocol standard. The userland companion is iscontrol(8), and permits access to remote virtual SCSI devices via cam(4). SYSCTL VARIABLES
debug.iscsi_initiator set the debug-level, 0 means no debugging, 9 for maximum. net.iscsi.isid the initiator part of the Session Identifier. The following are informative only: net.iscsi.driver_version the current version of the driver. net.iscsi.sessions the number of current active sessions. net.iscsi.n.targetname the target name of session n. net.iscsi.n.targedaddress the IP address of the target of session n. net.iscsi.n.stats statistics for session net.iscsi.n.pid the process id of the userland side of session n, see iscontrol(8). FILES
The iscsi_initiator driver creates the following: /dev/iscsi used to create new sessions. /dev/iscsi%d for each new session. SEE ALSO
cam(4), camcontrol(8), iscontrol(8) STANDARDS
iSCSI RFC 3720 BUGS
The lun discovery method is old-fashioned. BSD
May 9, 2010 BSD
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