> are you using comstar or the old iSCSI target (iscsitadm) to provision 
> targets?

I'm using zfs set shareiscsi=on to confugure the logical units and COMSTAR for 
the rest on the OpenSolaris side. The targets are initiated on Solaris 10 with 
iscsiadm.

This thing was humming right along and all of a sudden it stopped working after 
a few weeks. The connection is made via gigabit crossover cable using the 
e1000g driver on both ends. I get endless errors like this:

Apr 21 19:58:43 storage scsi: [ID 107833 kern.warning] WARNING: 
/p...@0,0/pci8086,3...@6/pci8086,3...@0/pci1028,1...@8 (mpt1):
Apr 21 19:58:43 storage         Disconnected command timeout for Target 27
Apr 21 19:58:45 storage scsi: [ID 365881 kern.info] 
/p...@0,0/pci8086,3...@6/pci8086,3...@0/pci1028,1...@8 (mpt1):
Apr 21 19:58:45 storage         Log info 0x31140000 received for target 27.
Apr 21 19:58:45 storage         scsi_status=0x0, ioc_status=0x8048, 
scsi_state=0xc
Apr 21 19:58:45 storage scsi: [ID 365881 kern.info] 
/p...@0,0/pci8086,3...@6/pci8086,3...@0/pci1028,1...@8 (mpt1):
Apr 21 19:58:45 storage         Log info 0x31140000 received for target 27.
Apr 21 19:58:45 storage         scsi_status=0x0, ioc_status=0x8048, 
scsi_state=0xc
Apr 21 19:58:45 storage scsi: [ID 365881 kern.info] 
/p...@0,0/pci8086,3...@6/pci8086,3...@0/pci1028,1...@8 (mpt1):
Apr 21 19:58:45 storage         Log info 0x31140000 received for target 27.
Apr 21 19:58:45 storage         scsi_status=0x0, ioc_status=0x8048, 
scsi_state=0xc

If anyone can suggest an optimal network setting for this, please chime in.
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