We need to make sure that we're talking about the same thing.  There is
MPIO, which absolutely you can do with Open-iSCSI (OiS).

I.e.  Here's one of my targets.  There are two connections to that volume
going to different GbE ports on the iSCSI array.  

Target:
iqn.2001-05.com.equallogic:6-8a0900-8d1cb3401-c2f0002decc46730-dw-open-iscsi
-backup
        Current Portal: 172.23.10.242:3260,1
        Persistent Portal: 172.23.10.240:3260,1
                **********
                Interface:
                **********
                Iface Name: iface.eth0
                Iface Transport: tcp
                Iface Initiatorname: iqn.2005-03.org.open-iscsi:2009610cb1b
                Iface IPaddress: 172.23.49.170
                Iface HWaddress: 00:04:23:C7:E1:5A
                Iface Netdev: default
                SID: 3
                iSCSI Connection State: LOGGED IN
                iSCSI Session State: Unknown
                Internal iscsid Session State: NO CHANGE
        Current Portal: 172.23.10.246:3260,1
        Persistent Portal: 172.23.10.240:3260,1
                **********
                Interface:
                **********
                Iface Name: iface.eth1
                Iface Transport: tcp
                Iface Initiatorname: iqn.2005-03.org.open-iscsi:2009610cb1b
                Iface IPaddress: 172.23.49.171
                Iface HWaddress: 00:04:23:C7:E1:5B
                Iface Netdev: default
                SID: 4
                iSCSI Connection State: LOGGED IN
                iSCSI Session State: Unknown
                Internal iscsid Session State: NO CHANGE

 And here's the multipath view of the devices. 

#multipath -ll
dw-open-iscsi-vol0 (30690a0284060efffe05b746ecd3ac236) dm-1 EQLOGIC ,100E-00
[size=250G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 6:0:0:0 sdd 8:48  [active][ready]
 \_ 7:0:0:0 sde 8:64  [active][ready]
backup-vol (30690a01840b31c8d3067c4ec2d00f0c2) dm-0 EQLOGIC ,100E-00
[size=200G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 9:0:0:0 sdb 8:16  [active][ready]
 \_ 8:0:0:0 sdc 8:32  [active][ready]

So I can lose a path and still function, and the IO load is split across
both paths when they're running. 


Then there's MC/S.  Mutlitple Connections in the same Session.  Which I
don't believe is supported.  

 Basically, the steps are define the egress ports, discover the and login to
the targets.  

 Configure multipath using the /etc/multipath.conf file and you're done.  I
also create persistent device names I.e. 'backup-vol' is
/dev/mapper/backup-vol-par1 for consistency and easier admin. 



 Regards,

 Don 



-----Original Message-----
From: open-iscsi@googlegroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Tuesday, July 22, 2008 2:43 AM
To: open-iscsi@googlegroups.com
Subject: RE: Multi-Path Connecitons


 
> If you are asking about iscsi's multiple connection sessions then you
will not find anything, because we do not support it.

Is that because it is not implemented or there are other design
considerations inhibiting the support/implementation?

Thanks,
Shyam



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