Thank you Andrew, I will now describe my problem completly.

The Problem I have is with a Sun Fire x4450 with Solaris 10 X86 update 5, all 
recommended Patches where applied.
I have an iSCSI Device (Vendor: NetAPP) which has 2 Network interfaces for 
better availability and performance.
So I get these targets on my Solaris machine:
censhare01:~# iscsiadm list target -S
Target: iqn.1992-08.com.netapp:sn.101203508
Alias: NetAppToaster
TPGT: 1006
ISID: 4000002a0000
Connections: 1
LUN: 3
Vendor: NETAPP
Product: LUN
OS Device Name: /dev/rdsk/c2t3d0s2

Target: iqn.1992-08.com.netapp:sn.101203508
Alias: NetAppToaster
TPGT: 1005
ISID: 4000002a0000
Connections: 1
LUN: 3
Vendor: NETAPP
Product: LUN
OS Device Name: /dev/rdsk/c2t4d0s2

Now I want to activate multipathing, that these two devices become one. But the 
only thing I´ve found is this http://www.sun.com/blueprints/1205/819-3730.pdf
Which only "talks" about how it works and whatever, especially in this Document 
the "MPxIO and Multiple SCSI Target Portals IDs" is what I want!

I already did this, whats in the Device and Filesystem Administrator Guide 
stood:
http://dlc.sun.com/pdf/817-5093/817-5093.pdf

In /kernel/drv/iscsi.conf I got:
mpxio-disable="no";

I also added the storage in the scsi_vhci.conf:
device-type-scsi-options-list =
"NETAPP LUN", "f_sym";
symmetric-option = 0x1000000;

I used iscsiadm to configure booth IP addresses of my NetApp storage:
iscsiadm modify initiator-node -c 10.2.1.10,10.2.1.11
iscsiadm modify target-param -c 10.2.1.10,10.2.1.11 
iqn.1992-08.com.netapp:sn.101203508

If I list the initiator-node I just get this:
server:/kernel/drv# iscsiadm list initiator-node
Initiator node name: iqn.1986-03.com.sun:01:4a4a34efffff.489b0c47
Initiator node alias: -
Login Parameters (Default/Configured):
Header Digest: NONE/-
Data Digest: NONE/-
Authentication Type: NONE
RADIUS Server: NONE
RADIUS access: unknown
Configured Sessions: 10.2.1.10 10.2.1.11

server:/kernel/drv# iscsiadm list target-param -v 
iqn.1992-08.com.netapp:sn.101203508
Target: iqn.1992-08.com.netapp:sn.101203508
Alias: NetAppToaster
Bi-directional Authentication: disabled
Authentication Type: NONE
Login Parameters (Default/Configured):
Data Sequence In Order: yes/-
Data PDU In Order: yes/-
Default Time To Retain: 20/-
Default Time To Wait: 2/-
Error Recovery Level: 0/-
First Burst Length: 65536/-
Immediate Data: yes/-
Initial Ready To Transfer (R2T): yes/-
Max Burst Length: 262144/-
Max Outstanding R2T: 1/-
Max Receive Data Segment Length: 8192/-
Max Connections: 1/-
Header Digest: NONE/-
Data Digest: NONE/-
Configured Sessions: 10.2.1.10 10.2.1.11

But with mpathadm list lu I get nothing and with format I still see too many 
devices:
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <DEFAULT cyl 17747 alt 2 hd 255 sec 63>
/[EMAIL PROTECTED],0/pci8086,[EMAIL PROTECTED]/pci1000,[EMAIL PROTECTED]/[EMAIL 
PROTECTED],0
1. c0t2d0 <DEFAULT cyl 17846 alt 2 hd 255 sec 63>
/[EMAIL PROTECTED],0/pci8086,[EMAIL PROTECTED]/pci1000,[EMAIL PROTECTED]/[EMAIL 
PROTECTED],0
2. c2t3d0 <DEFAULT cyl 26106 alt 2 hd 255 sec 63>
/iscsi/[EMAIL PROTECTED],3
3. c2t4d0 <DEFAULT cyl 26106 alt 2 hd 255 sec 63>
/iscsi/[EMAIL PROTECTED],3
4. c2t6d0 <DEFAULT cyl 26106 alt 2 hd 255 sec 63>
/iscsi/[EMAIL PROTECTED],3
5. c2t7d0 <DEFAULT cyl 26106 alt 2 hd 255 sec 63>
/iscsi/[EMAIL PROTECTED],3 


I wrote to Andrew Rutz because I found in this Bug Report:
http://bugs.opensolaris.org/view_bug.do?bug_id=6617068
exactly that, what I wanted. I don´t have the Bug, but I also have a NetApp 
with iSCSI and want multipathing.

And I don´t understand why this guy has these long device names, which 
indicates mutipath capabilities. 

I would appreciate any help.
 
 
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